Hbs1p [Saccharomyces cerevisiae YJM689]
Protein Classification
translation factor GTPase family protein( domain architecture ID 12097944)
translation factor GTPase family protein, such as yeast translation factor Hbs1p that is a GTPase with similarity to translation release factors and which together with DOM34, functions in recognizing the stalled ribosome and triggering endonucleolytic cleavage
List of domain hits
| Name | Accession | Description | Interval | E-value | |||||||
| EF1_alpha | cd01883 | Elongation Factor 1-alpha (EF1-alpha) protein family; EF1 is responsible for the GTP-dependent ... |
169-383 | 3.02e-119 | |||||||
Elongation Factor 1-alpha (EF1-alpha) protein family; EF1 is responsible for the GTP-dependent binding of aminoacyl-tRNAs to the ribosomes. EF1 is composed of four subunits: the alpha chain which binds GTP and aminoacyl-tRNAs, the gamma chain that probably plays a role in anchoring the complex to other cellular components and the beta and delta (or beta') chains. This subfamily is the alpha subunit, and represents the counterpart of bacterial EF-Tu for the archaea (aEF1-alpha) and eukaryotes (eEF1-alpha). eEF1-alpha interacts with the actin of the eukaryotic cytoskeleton and may thereby play a role in cellular transformation and apoptosis. EF-Tu can have no such role in bacteria. In humans, the isoform eEF1A2 is overexpressed in 2/3 of breast cancers and has been identified as a putative oncogene. This subfamily also includes Hbs1, a G protein known to be important for efficient growth and protein synthesis under conditions of limiting translation initiation in yeast, and to associate with Dom34. It has been speculated that yeast Hbs1 and Dom34 proteins may function as part of a complex with a role in gene expression. : Pssm-ID: 206670 [Multi-domain] Cd Length: 219 Bit Score: 352.56 E-value: 3.02e-119
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| TEF1 super family | cl34957 | Translation elongation factor EF-1alpha (GTPase) [Translation, ribosomal structure and ... |
166-611 | 2.37e-94 | |||||||
Translation elongation factor EF-1alpha (GTPase) [Translation, ribosomal structure and biogenesis]; Translation elongation factor EF-1alpha (GTPase) is part of the Pathway/BioSystem: Translation factors The actual alignment was detected with superfamily member COG5256: Pssm-ID: 444074 [Multi-domain] Cd Length: 423 Bit Score: 296.07 E-value: 2.37e-94
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| HBS1_N | pfam08938 | HBS1 N-terminus; This domain is found at the N-terminus of HBS1 proteins. It interacts with ... |
5-73 | 2.80e-11 | |||||||
HBS1 N-terminus; This domain is found at the N-terminus of HBS1 proteins. It interacts with the ribosomal protein rpS3 at the mRNA entry site. : Pssm-ID: 462642 Cd Length: 76 Bit Score: 59.52 E-value: 2.80e-11
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| Name | Accession | Description | Interval | E-value | |||||||
| EF1_alpha | cd01883 | Elongation Factor 1-alpha (EF1-alpha) protein family; EF1 is responsible for the GTP-dependent ... |
169-383 | 3.02e-119 | |||||||
Elongation Factor 1-alpha (EF1-alpha) protein family; EF1 is responsible for the GTP-dependent binding of aminoacyl-tRNAs to the ribosomes. EF1 is composed of four subunits: the alpha chain which binds GTP and aminoacyl-tRNAs, the gamma chain that probably plays a role in anchoring the complex to other cellular components and the beta and delta (or beta') chains. This subfamily is the alpha subunit, and represents the counterpart of bacterial EF-Tu for the archaea (aEF1-alpha) and eukaryotes (eEF1-alpha). eEF1-alpha interacts with the actin of the eukaryotic cytoskeleton and may thereby play a role in cellular transformation and apoptosis. EF-Tu can have no such role in bacteria. In humans, the isoform eEF1A2 is overexpressed in 2/3 of breast cancers and has been identified as a putative oncogene. This subfamily also includes Hbs1, a G protein known to be important for efficient growth and protein synthesis under conditions of limiting translation initiation in yeast, and to associate with Dom34. It has been speculated that yeast Hbs1 and Dom34 proteins may function as part of a complex with a role in gene expression. Pssm-ID: 206670 [Multi-domain] Cd Length: 219 Bit Score: 352.56 E-value: 3.02e-119
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| TEF1 | COG5256 | Translation elongation factor EF-1alpha (GTPase) [Translation, ribosomal structure and ... |
166-611 | 2.37e-94 | |||||||
Translation elongation factor EF-1alpha (GTPase) [Translation, ribosomal structure and biogenesis]; Translation elongation factor EF-1alpha (GTPase) is part of the Pathway/BioSystem: Translation factors Pssm-ID: 444074 [Multi-domain] Cd Length: 423 Bit Score: 296.07 E-value: 2.37e-94
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| PRK12317 | PRK12317 | elongation factor 1-alpha; Reviewed |
166-611 | 4.25e-92 | |||||||
elongation factor 1-alpha; Reviewed Pssm-ID: 237055 [Multi-domain] Cd Length: 425 Bit Score: 290.29 E-value: 4.25e-92
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| PTZ00141 | PTZ00141 | elongation factor 1- alpha; Provisional |
167-493 | 1.61e-83 | |||||||
elongation factor 1- alpha; Provisional Pssm-ID: 185474 [Multi-domain] Cd Length: 446 Bit Score: 268.92 E-value: 1.61e-83
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| EF-1_alpha | TIGR00483 | translation elongation factor EF-1 alpha; This model represents the counterpart of bacterial ... |
166-610 | 7.15e-78 | |||||||
translation elongation factor EF-1 alpha; This model represents the counterpart of bacterial EF-Tu for the Archaea (aEF-1 alpha) and Eukaryotes (eEF-1 alpha). The trusted cutoff is set fairly high so that incomplete sequences will score between suggested and trusted cutoff levels. [Protein synthesis, Translation factors] Pssm-ID: 129574 [Multi-domain] Cd Length: 426 Bit Score: 253.25 E-value: 7.15e-78
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| CysN | TIGR02034 | sulfate adenylyltransferase, large subunit; Metabolic assimilation of sulfur from inorganic ... |
168-606 | 1.81e-62 | |||||||
sulfate adenylyltransferase, large subunit; Metabolic assimilation of sulfur from inorganic sulfate, requires sulfate activation by coupling to a nucleoside, for the production of high-energy nucleoside phosphosulfates. This pathway appears to be similar in all prokaryotic organisms. Activation is first achieved through sulfation of sulfate with ATP by sulfate adenylyltransferase (ATP sulfurylase) to produce 5'-phosphosulfate (APS), coupled by GTP hydrolysis. Subsequently, APS is phosphorylated by an APS kinase to produce 3'-phosphoadenosine-5'-phosphosulfate (PAPS). In Escherichia coli, ATP sulfurylase is a heterodimer composed of two subunits encoded by cysD and cysN, with APS kinase encoded by cysC. These genes are located in a unidirectionally transcribed gene cluster, and have been shown to be required for the synthesis of sulfur-containing amino acids. Homologous to this E.coli activation pathway are nodPQH gene products found among members of the Rhizobiaceae family. These gene products have been shown to exhibit ATP sulfurase and APS kinase activity, yet are involved in Nod factor sulfation, and sulfation of other macromolecules. With members of the Rhizobiaceae family, nodQ often appears as a fusion of cysN (large subunit of ATP sulfurase) and cysC (APS kinase). [Central intermediary metabolism, Sulfur metabolism] Pssm-ID: 213679 [Multi-domain] Cd Length: 406 Bit Score: 211.85 E-value: 1.81e-62
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| GTP_EFTU | pfam00009 | Elongation factor Tu GTP binding domain; This domain contains a P-loop motif, also found in ... |
166-362 | 6.30e-57 | |||||||
Elongation factor Tu GTP binding domain; This domain contains a P-loop motif, also found in several other families such as pfam00071, pfam00025 and pfam00063. Elongation factor Tu consists of three structural domains, this plus two C-terminal beta barrel domains. Pssm-ID: 425418 [Multi-domain] Cd Length: 187 Bit Score: 190.04 E-value: 6.30e-57
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| HBS1_C_III | cd04093 | C-terminal domain of Hsp70 subfamily B suppressor 1 (HBS1); This model represents the ... |
506-609 | 4.73e-41 | |||||||
C-terminal domain of Hsp70 subfamily B suppressor 1 (HBS1); This model represents the C-terminal domain of Hsp70 subfamily B suppressor 1 (HBS1), which is homologous to the domain III of EF-1alpha. This group contains proteins similar to yeast Hbs1, which together with Dom34, promotes the No-go decay (NGD) of mRNA. The NGD targets mRNAs whose elongation stalled for degradation initiated by endonucleolytic cleavage in the vicinity of the stalled ribosome. Pssm-ID: 294008 [Multi-domain] Cd Length: 109 Bit Score: 144.22 E-value: 4.73e-41
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| TufA | COG0050 | Translation elongation factor EF-Tu, a GTPase [Translation, ribosomal structure and biogenesis] ... |
159-489 | 9.95e-23 | |||||||
Translation elongation factor EF-Tu, a GTPase [Translation, ribosomal structure and biogenesis]; Translation elongation factor EF-Tu, a GTPase is part of the Pathway/BioSystem: Translation factors Pssm-ID: 439820 [Multi-domain] Cd Length: 396 Bit Score: 100.61 E-value: 9.95e-23
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| HBS1_N | pfam08938 | HBS1 N-terminus; This domain is found at the N-terminus of HBS1 proteins. It interacts with ... |
5-73 | 2.80e-11 | |||||||
HBS1 N-terminus; This domain is found at the N-terminus of HBS1 proteins. It interacts with the ribosomal protein rpS3 at the mRNA entry site. Pssm-ID: 462642 Cd Length: 76 Bit Score: 59.52 E-value: 2.80e-11
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| GTP_EFTU_D3 | pfam03143 | Elongation factor Tu C-terminal domain; Elongation factor Tu consists of three structural ... |
503-609 | 3.64e-03 | |||||||
Elongation factor Tu C-terminal domain; Elongation factor Tu consists of three structural domains, this is the third domain. This domain adopts a beta barrel structure. This the third domain is involved in binding to both charged tRNA and binding to EF-Ts pfam00889. Pssm-ID: 397314 [Multi-domain] Cd Length: 105 Bit Score: 37.24 E-value: 3.64e-03
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| Name | Accession | Description | Interval | E-value | |||||||
| EF1_alpha | cd01883 | Elongation Factor 1-alpha (EF1-alpha) protein family; EF1 is responsible for the GTP-dependent ... |
169-383 | 3.02e-119 | |||||||
Elongation Factor 1-alpha (EF1-alpha) protein family; EF1 is responsible for the GTP-dependent binding of aminoacyl-tRNAs to the ribosomes. EF1 is composed of four subunits: the alpha chain which binds GTP and aminoacyl-tRNAs, the gamma chain that probably plays a role in anchoring the complex to other cellular components and the beta and delta (or beta') chains. This subfamily is the alpha subunit, and represents the counterpart of bacterial EF-Tu for the archaea (aEF1-alpha) and eukaryotes (eEF1-alpha). eEF1-alpha interacts with the actin of the eukaryotic cytoskeleton and may thereby play a role in cellular transformation and apoptosis. EF-Tu can have no such role in bacteria. In humans, the isoform eEF1A2 is overexpressed in 2/3 of breast cancers and has been identified as a putative oncogene. This subfamily also includes Hbs1, a G protein known to be important for efficient growth and protein synthesis under conditions of limiting translation initiation in yeast, and to associate with Dom34. It has been speculated that yeast Hbs1 and Dom34 proteins may function as part of a complex with a role in gene expression. Pssm-ID: 206670 [Multi-domain] Cd Length: 219 Bit Score: 352.56 E-value: 3.02e-119
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| TEF1 | COG5256 | Translation elongation factor EF-1alpha (GTPase) [Translation, ribosomal structure and ... |
166-611 | 2.37e-94 | |||||||
Translation elongation factor EF-1alpha (GTPase) [Translation, ribosomal structure and biogenesis]; Translation elongation factor EF-1alpha (GTPase) is part of the Pathway/BioSystem: Translation factors Pssm-ID: 444074 [Multi-domain] Cd Length: 423 Bit Score: 296.07 E-value: 2.37e-94
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| PRK12317 | PRK12317 | elongation factor 1-alpha; Reviewed |
166-611 | 4.25e-92 | |||||||
elongation factor 1-alpha; Reviewed Pssm-ID: 237055 [Multi-domain] Cd Length: 425 Bit Score: 290.29 E-value: 4.25e-92
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| PTZ00141 | PTZ00141 | elongation factor 1- alpha; Provisional |
167-493 | 1.61e-83 | |||||||
elongation factor 1- alpha; Provisional Pssm-ID: 185474 [Multi-domain] Cd Length: 446 Bit Score: 268.92 E-value: 1.61e-83
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| EF-1_alpha | TIGR00483 | translation elongation factor EF-1 alpha; This model represents the counterpart of bacterial ... |
166-610 | 7.15e-78 | |||||||
translation elongation factor EF-1 alpha; This model represents the counterpart of bacterial EF-Tu for the Archaea (aEF-1 alpha) and Eukaryotes (eEF-1 alpha). The trusted cutoff is set fairly high so that incomplete sequences will score between suggested and trusted cutoff levels. [Protein synthesis, Translation factors] Pssm-ID: 129574 [Multi-domain] Cd Length: 426 Bit Score: 253.25 E-value: 7.15e-78
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| CysN | COG2895 | Sulfate adenylyltransferase subunit 1, EFTu-like GTPase family [Inorganic ion transport and ... |
168-608 | 4.16e-68 | |||||||
Sulfate adenylyltransferase subunit 1, EFTu-like GTPase family [Inorganic ion transport and metabolism]; Sulfate adenylyltransferase subunit 1, EFTu-like GTPase family is part of the Pathway/BioSystem: Cysteine biosynthesis Pssm-ID: 442140 [Multi-domain] Cd Length: 430 Bit Score: 227.66 E-value: 4.16e-68
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| PLN00043 | PLN00043 | elongation factor 1-alpha; Provisional |
167-611 | 1.04e-66 | |||||||
elongation factor 1-alpha; Provisional Pssm-ID: 165621 [Multi-domain] Cd Length: 447 Bit Score: 224.58 E-value: 1.04e-66
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| CysN | TIGR02034 | sulfate adenylyltransferase, large subunit; Metabolic assimilation of sulfur from inorganic ... |
168-606 | 1.81e-62 | |||||||
sulfate adenylyltransferase, large subunit; Metabolic assimilation of sulfur from inorganic sulfate, requires sulfate activation by coupling to a nucleoside, for the production of high-energy nucleoside phosphosulfates. This pathway appears to be similar in all prokaryotic organisms. Activation is first achieved through sulfation of sulfate with ATP by sulfate adenylyltransferase (ATP sulfurylase) to produce 5'-phosphosulfate (APS), coupled by GTP hydrolysis. Subsequently, APS is phosphorylated by an APS kinase to produce 3'-phosphoadenosine-5'-phosphosulfate (PAPS). In Escherichia coli, ATP sulfurylase is a heterodimer composed of two subunits encoded by cysD and cysN, with APS kinase encoded by cysC. These genes are located in a unidirectionally transcribed gene cluster, and have been shown to be required for the synthesis of sulfur-containing amino acids. Homologous to this E.coli activation pathway are nodPQH gene products found among members of the Rhizobiaceae family. These gene products have been shown to exhibit ATP sulfurase and APS kinase activity, yet are involved in Nod factor sulfation, and sulfation of other macromolecules. With members of the Rhizobiaceae family, nodQ often appears as a fusion of cysN (large subunit of ATP sulfurase) and cysC (APS kinase). [Central intermediary metabolism, Sulfur metabolism] Pssm-ID: 213679 [Multi-domain] Cd Length: 406 Bit Score: 211.85 E-value: 1.81e-62
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| GTP_EFTU | pfam00009 | Elongation factor Tu GTP binding domain; This domain contains a P-loop motif, also found in ... |
166-362 | 6.30e-57 | |||||||
Elongation factor Tu GTP binding domain; This domain contains a P-loop motif, also found in several other families such as pfam00071, pfam00025 and pfam00063. Elongation factor Tu consists of three structural domains, this plus two C-terminal beta barrel domains. Pssm-ID: 425418 [Multi-domain] Cd Length: 187 Bit Score: 190.04 E-value: 6.30e-57
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| PRK05506 | PRK05506 | bifunctional sulfate adenylyltransferase subunit 1/adenylylsulfate kinase protein; Provisional |
154-607 | 1.50e-53 | |||||||
bifunctional sulfate adenylyltransferase subunit 1/adenylylsulfate kinase protein; Provisional Pssm-ID: 180120 [Multi-domain] Cd Length: 632 Bit Score: 193.22 E-value: 1.50e-53
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| CysN_ATPS | cd04166 | CysN, together with protein CysD, forms the ATP sulfurylase (ATPS) complex; CysN_ATPS ... |
170-383 | 3.25e-52 | |||||||
CysN, together with protein CysD, forms the ATP sulfurylase (ATPS) complex; CysN_ATPS subfamily. CysN, together with protein CysD, form the ATP sulfurylase (ATPS) complex in some bacteria and lower eukaryotes. ATPS catalyzes the production of ATP sulfurylase (APS) and pyrophosphate (PPi) from ATP and sulfate. CysD, which catalyzes ATP hydrolysis, is a member of the ATP pyrophosphatase (ATP PPase) family. CysN hydrolysis of GTP is required for CysD hydrolysis of ATP; however, CysN hydrolysis of GTP is not dependent on CysD hydrolysis of ATP. CysN is an example of lateral gene transfer followed by acquisition of new function. In many organisms, an ATPS exists which is not GTP-dependent and shares no sequence or structural similarity to CysN. Pssm-ID: 206729 [Multi-domain] Cd Length: 209 Bit Score: 178.15 E-value: 3.25e-52
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| cysN | PRK05124 | sulfate adenylyltransferase subunit 1; Provisional |
168-573 | 1.35e-51 | |||||||
sulfate adenylyltransferase subunit 1; Provisional Pssm-ID: 235349 [Multi-domain] Cd Length: 474 Bit Score: 184.73 E-value: 1.35e-51
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| HBS1_C_III | cd04093 | C-terminal domain of Hsp70 subfamily B suppressor 1 (HBS1); This model represents the ... |
506-609 | 4.73e-41 | |||||||
C-terminal domain of Hsp70 subfamily B suppressor 1 (HBS1); This model represents the C-terminal domain of Hsp70 subfamily B suppressor 1 (HBS1), which is homologous to the domain III of EF-1alpha. This group contains proteins similar to yeast Hbs1, which together with Dom34, promotes the No-go decay (NGD) of mRNA. The NGD targets mRNAs whose elongation stalled for degradation initiated by endonucleolytic cleavage in the vicinity of the stalled ribosome. Pssm-ID: 294008 [Multi-domain] Cd Length: 109 Bit Score: 144.22 E-value: 4.73e-41
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| GTP_translation_factor | cd00881 | GTP translation factor family primarily contains translation initiation, elongation and ... |
170-363 | 1.95e-35 | |||||||
GTP translation factor family primarily contains translation initiation, elongation and release factors; The GTP translation factor family consists primarily of translation initiation, elongation, and release factors, which play specific roles in protein translation. In addition, the family includes Snu114p, a component of the U5 small nuclear riboprotein particle which is a component of the spliceosome and is involved in excision of introns, TetM, a tetracycline resistance gene that protects the ribosome from tetracycline binding, and the unusual subfamily CysN/ATPS, which has an unrelated function (ATP sulfurylase) acquired through lateral transfer of the EF1-alpha gene and development of a new function. Pssm-ID: 206647 [Multi-domain] Cd Length: 183 Bit Score: 131.65 E-value: 1.95e-35
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| eRF3_II_like | cd03698 | Domain II of the eukaryotic class II release factor-like proteins; This model represents the ... |
400-494 | 8.24e-33 | |||||||
Domain II of the eukaryotic class II release factor-like proteins; This model represents the domain similar to domain II of the eukaryotic class II release factor (eRF3). In eukaryotes, translation termination is mediated by two interacting release factors, eRF1 and eRF3, which act as class I and II factors, respectively. eRF1 functions as an omnipotent release factor, decoding all three stop codons and triggering the release of the nascent peptide catalyzed by the ribosome. eRF3 is a GTPase, which enhances termination efficiency by stimulating eRF1 activity in a GTP-dependent manner. Sequence comparison of class II release factors with elongation factors shows that eRF3 is more similar to eEF-1alpha whereas prokaryote RF3 is more similar to EF-G, implying that their precise function may differ. Only eukaryote RF3s are found in this group. Saccharomyces cerevisiae eRF3 (Sup35p) is a translation termination factor which is divided into three regions N, M and a C-terminal eEF1a-like region essential for translation termination. Sup35NM is a non-pathogenic prion-like protein with the property of aggregating into polymer-like fibrils. This group also contains proteins similar to S. cerevisiae Hbs1, a G protein known to be important for efficient growth and protein synthesis under conditions of limiting translation initiation and to associate with Dom34. It has been speculated that yeast Hbs1 and Dom34 proteins may function as part of a complex with a role in gene expression. Pssm-ID: 293899 [Multi-domain] Cd Length: 84 Bit Score: 120.68 E-value: 8.24e-33
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| SelB | COG3276 | Selenocysteine-specific translation elongation factor SelB [Translation, ribosomal structure ... |
174-606 | 9.29e-31 | |||||||
Selenocysteine-specific translation elongation factor SelB [Translation, ribosomal structure and biogenesis]; Selenocysteine-specific translation elongation factor SelB is part of the Pathway/BioSystem: Translation factors Pssm-ID: 442507 [Multi-domain] Cd Length: 630 Bit Score: 127.34 E-value: 9.29e-31
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| Translation_factor_III | cd01513 | Domain III of Elongation factor (EF) Tu (EF-TU) and related proteins; Elongation factor (EF) ... |
501-606 | 2.74e-29 | |||||||
Domain III of Elongation factor (EF) Tu (EF-TU) and related proteins; Elongation factor (EF) EF-Tu participates in the elongation phase during protein biosynthesis on the ribosome. Its functional cycles depend on GTP binding and its hydrolysis. The EF-Tu complexed with GTP and aminoacyl-tRNA delivers tRNA to the ribosome, whereas EF-G stimulates translocation, a process in which tRNA and mRNA movements occur in the ribosome. Experimental findings indicate an essential contribution of domain III to activation of GTP hydrolysis. This domain III, which is distinct from the domain III in EFG and related elongation factors, is found in several eukaryotic translation factors, like peptide chain release factors RF3, elongation factor 1, selenocysteine (Sec)-specific elongation factor, and in GT-1 family of GTPase (GTPBP1). Pssm-ID: 275447 [Multi-domain] Cd Length: 102 Bit Score: 111.72 E-value: 2.74e-29
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| PLN03126 | PLN03126 | Elongation factor Tu; Provisional |
166-611 | 8.10e-29 | |||||||
Elongation factor Tu; Provisional Pssm-ID: 215592 [Multi-domain] Cd Length: 478 Bit Score: 120.11 E-value: 8.10e-29
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| tufA | CHL00071 | elongation factor Tu |
166-609 | 4.53e-26 | |||||||
elongation factor Tu Pssm-ID: 177010 [Multi-domain] Cd Length: 409 Bit Score: 110.82 E-value: 4.53e-26
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| selB | TIGR00475 | selenocysteine-specific elongation factor SelB; In prokaryotes, the incorporation of ... |
170-548 | 2.08e-25 | |||||||
selenocysteine-specific elongation factor SelB; In prokaryotes, the incorporation of selenocysteine as the 21st amino acid, encoded by TGA, requires several elements: SelC is the tRNA itself, SelD acts as a donor of reduced selenium, SelA modifies a serine residue on SelC into selenocysteine, and SelB is a selenocysteine-specific translation elongation factor. 3-prime or 5-prime non-coding elements of mRNA have been found as probable structures for directing selenocysteine incorporation. This model describes the elongation factor SelB, a close homolog rf EF-Tu. It may function by replacing EF-Tu. A C-terminal domain not found in EF-Tu is in all SelB sequences in the seed alignment except that from Methanococcus jannaschii. This model does not find an equivalent protein for eukaryotes. [Protein synthesis, Translation factors] Pssm-ID: 129567 [Multi-domain] Cd Length: 581 Bit Score: 110.73 E-value: 2.08e-25
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| EF_Tu | cd01884 | Elongation Factor Tu (EF-Tu) GTP-binding proteins; EF-Tu subfamily. This subfamily includes ... |
166-319 | 1.18e-24 | |||||||
Elongation Factor Tu (EF-Tu) GTP-binding proteins; EF-Tu subfamily. This subfamily includes orthologs of translation elongation factor EF-Tu in bacteria, mitochondria, and chloroplasts. It is one of several GTP-binding translation factors found in the larger family of GTP-binding elongation factors. The eukaryotic counterpart, eukaryotic translation elongation factor 1 (eEF-1 alpha), is excluded from this family. EF-Tu is one of the most abundant proteins in bacteria, as well as, one of the most highly conserved, and in a number of species the gene is duplicated with identical function. When bound to GTP, EF-Tu can form a complex with any (correctly) aminoacylated tRNA except those for initiation and for selenocysteine, in which case EF-Tu is replaced by other factors. Transfer RNA is carried to the ribosome in these complexes for protein translation. Pssm-ID: 206671 [Multi-domain] Cd Length: 195 Bit Score: 101.51 E-value: 1.18e-24
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| PLN03127 | PLN03127 | Elongation factor Tu; Provisional |
166-489 | 1.07e-23 | |||||||
Elongation factor Tu; Provisional Pssm-ID: 178673 [Multi-domain] Cd Length: 447 Bit Score: 104.14 E-value: 1.07e-23
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| PRK00049 | PRK00049 | elongation factor Tu; Reviewed |
166-489 | 3.41e-23 | |||||||
elongation factor Tu; Reviewed Pssm-ID: 234596 [Multi-domain] Cd Length: 396 Bit Score: 102.19 E-value: 3.41e-23
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| PRK12736 | PRK12736 | elongation factor Tu; Reviewed |
166-493 | 5.07e-23 | |||||||
elongation factor Tu; Reviewed Pssm-ID: 237184 [Multi-domain] Cd Length: 394 Bit Score: 101.56 E-value: 5.07e-23
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| TufA | COG0050 | Translation elongation factor EF-Tu, a GTPase [Translation, ribosomal structure and biogenesis] ... |
159-489 | 9.95e-23 | |||||||
Translation elongation factor EF-Tu, a GTPase [Translation, ribosomal structure and biogenesis]; Translation elongation factor EF-Tu, a GTPase is part of the Pathway/BioSystem: Translation factors Pssm-ID: 439820 [Multi-domain] Cd Length: 396 Bit Score: 100.61 E-value: 9.95e-23
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| HBS1-like_II | cd16267 | Domain II of Hbs1-like proteins; S. cerevisiae Hbs1 is closely related to the eukaryotic class ... |
400-494 | 2.38e-22 | |||||||
Domain II of Hbs1-like proteins; S. cerevisiae Hbs1 is closely related to the eukaryotic class II release factor (eRF3). Hbs1, together with Dom34 (pelota), plays an important role in termination and recycling, but in contrast to eRF3/eRF1, Hbs1, together with Dom34 (pelota), functions on mRNA-bound ribosomes in a codon-independent manner and promotes subunit splitting on completely empty ribosomes. Pssm-ID: 293912 [Multi-domain] Cd Length: 84 Bit Score: 91.42 E-value: 2.38e-22
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| SelB | cd04171 | SelB, the dedicated elongation factor for delivery of selenocysteinyl-tRNA to the ribosome; ... |
174-359 | 1.71e-19 | |||||||
SelB, the dedicated elongation factor for delivery of selenocysteinyl-tRNA to the ribosome; SelB is an elongation factor needed for the co-translational incorporation of selenocysteine. Selenocysteine is coded by a UGA stop codon in combination with a specific downstream mRNA hairpin. In bacteria, the C-terminal part of SelB recognizes this hairpin, while the N-terminal part binds GTP and tRNA in analogy with elongation factor Tu (EF-Tu). It specifically recognizes the selenocysteine charged tRNAsec, which has a UCA anticodon, in an EF-Tu like manner. This allows insertion of selenocysteine at in-frame UGA stop codons. In E. coli SelB binds GTP, selenocysteyl-tRNAsec, and a stem-loop structure immediately downstream of the UGA codon (the SECIS sequence). The absence of active SelB prevents the participation of selenocysteyl-tRNAsec in translation. Archaeal and animal mechanisms of selenocysteine incorporation are more complex. Although the SECIS elements have different secondary structures and conserved elements between archaea and eukaryotes, they do share a common feature. Unlike in E. coli, these SECIS elements are located in the 3' UTRs. This group contains bacterial SelBs, as well as, one from archaea. Pssm-ID: 206734 [Multi-domain] Cd Length: 170 Bit Score: 86.12 E-value: 1.71e-19
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| SelB_euk | cd01889 | SelB, the dedicated elongation factor for delivery of selenocysteinyl-tRNA to the ribosome; ... |
172-358 | 8.34e-16 | |||||||
SelB, the dedicated elongation factor for delivery of selenocysteinyl-tRNA to the ribosome; SelB is an elongation factor needed for the co-translational incorporation of selenocysteine. Selenocysteine is coded by a UGA stop codon in combination with a specific downstream mRNA hairpin. In bacteria, the C-terminal part of SelB recognizes this hairpin, while the N-terminal part binds GTP and tRNA in analogy with elongation factor Tu (EF-Tu). It specifically recognizes the selenocysteine charged tRNAsec, which has a UCA anticodon, in an EF-Tu like manner. This allows insertion of selenocysteine at in-frame UGA stop codons. In E. coli SelB binds GTP, selenocysteyl-tRNAsec and a stem-loop structure immediately downstream of the UGA codon (the SECIS sequence). The absence of active SelB prevents the participation of selenocysteyl-tRNAsec in translation. Archaeal and animal mechanisms of selenocysteine incorporation are more complex. Although the SECIS elements have different secondary structures and conserved elements between archaea and eukaryotes, they do share a common feature. Unlike in E. coli, these SECIS elements are located in the 3' UTRs. This group contains eukaryotic SelBs and some from archaea. Pssm-ID: 206676 [Multi-domain] Cd Length: 192 Bit Score: 75.87 E-value: 8.34e-16
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| TetM_like | cd04168 | Tet(M)-like family includes Tet(M), Tet(O), Tet(W), and OtrA, containing tetracycline ... |
172-412 | 7.22e-15 | |||||||
Tet(M)-like family includes Tet(M), Tet(O), Tet(W), and OtrA, containing tetracycline resistant proteins; Tet(M), Tet(O), Tet(W), and OtrA are tetracycline resistance genes found in Gram-positive and Gram-negative bacteria. Tetracyclines inhibit protein synthesis by preventing aminoacyl-tRNA from binding to the ribosomal acceptor site. This subfamily contains tetracycline resistance proteins that function through ribosomal protection and are typically found on mobile genetic elements, such as transposons or plasmids, and are often conjugative. Ribosomal protection proteins are homologous to the elongation factors EF-Tu and EF-G. EF-G and Tet(M) compete for binding on the ribosomes. Tet(M) has a higher affinity than EF-G, suggesting these two proteins may have overlapping binding sites and that Tet(M) must be released before EF-G can bind. Tet(M) and Tet(O) have been shown to have ribosome-dependent GTPase activity. These proteins are part of the GTP translation factor family, which includes EF-G, EF-Tu, EF2, LepA, and SelB. Pssm-ID: 206731 [Multi-domain] Cd Length: 237 Bit Score: 74.58 E-value: 7.22e-15
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| TypA_BipA | cd01891 | Tyrosine phosphorylated protein A (TypA)/BipA family belongs to ribosome-binding GTPases; BipA ... |
172-344 | 1.47e-12 | |||||||
Tyrosine phosphorylated protein A (TypA)/BipA family belongs to ribosome-binding GTPases; BipA is a protein belonging to the ribosome-binding family of GTPases and is widely distributed in bacteria and plants. BipA was originally described as a protein that is induced in Salmonella typhimurium after exposure to bactericidal/permeability-inducing protein (a cationic antimicrobial protein produced by neutrophils), and has since been identified in E. coli as well. The properties thus far described for BipA are related to its role in the process of pathogenesis by enteropathogenic E. coli. It appears to be involved in the regulation of several processes important for infection, including rearrangements of the cytoskeleton of the host, bacterial resistance to host defense peptides, flagellum-mediated cell motility, and expression of K5 capsular genes. It has been proposed that BipA may utilize a novel mechanism to regulate the expression of target genes. In addition, BipA from enteropathogenic E. coli has been shown to be phosphorylated on a tyrosine residue, while BipA from Salmonella and from E. coli K12 strains is not phosphorylated under the conditions assayed. The phosphorylation apparently modifies the rate of nucleotide hydrolysis, with the phosphorylated form showing greatly increased GTPase activity. Pssm-ID: 206678 [Multi-domain] Cd Length: 194 Bit Score: 66.46 E-value: 1.47e-12
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| eRF3_C_III | cd03704 | C-terminal domain of eRF3; This model represents the eEF1alpha-like C-terminal region of eRF3, ... |
501-609 | 4.52e-12 | |||||||
C-terminal domain of eRF3; This model represents the eEF1alpha-like C-terminal region of eRF3, which is homologous to the domain III of EF-Tu. eRF3 is a GTPase which enhances termination efficiency by stimulating eRF1 activity in a GTP-dependent manner. The C-terminal region is responsible for translation termination activity and is essential for viability. Saccharomyces cerevisiae eRF3 (Sup35p) is a translation termination factor which is divided into three regions: N, M and a C-terminal eEF1a-like region essential for translation termination. Sup35NM is a non-pathogenic prion-like protein with the property of aggregating into polymer-like fibrils. Pssm-ID: 294003 [Multi-domain] Cd Length: 108 Bit Score: 62.96 E-value: 4.52e-12
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| HBS1_N | pfam08938 | HBS1 N-terminus; This domain is found at the N-terminus of HBS1 proteins. It interacts with ... |
5-73 | 2.80e-11 | |||||||
HBS1 N-terminus; This domain is found at the N-terminus of HBS1 proteins. It interacts with the ribosomal protein rpS3 at the mRNA entry site. Pssm-ID: 462642 Cd Length: 76 Bit Score: 59.52 E-value: 2.80e-11
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| PRK12740 | PRK12740 | elongation factor G-like protein EF-G2; |
173-316 | 1.84e-10 | |||||||
elongation factor G-like protein EF-G2; Pssm-ID: 237186 [Multi-domain] Cd Length: 668 Bit Score: 63.99 E-value: 1.84e-10
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| eRF3_II | cd04089 | Domain II of the eukaryotic class II release factor; In eukaryotes, translation termination is ... |
421-489 | 3.46e-10 | |||||||
Domain II of the eukaryotic class II release factor; In eukaryotes, translation termination is mediated by two interacting release factors, eRF1 and eRF3, which act as class I and II factors, respectively. eRF1 functions as an omnipotent release factor, decoding all three stop codons and triggering the release of the nascent peptide catalyzed by the ribosome. eRF3 is a GTPase, which enhances termination efficiency by stimulating eRF1 activity in a GTP-dependent manner. Sequence comparison of class II release factors with elongation factors shows that eRF3 is more similar to eEF-1alpha whereas prokaryote RF3 is more similar to EF-G, implying that their precise function may differ. Only eukaryote RF3s are found in this group. Saccharomyces cerevisiae eRF3 (Sup35p) is a translation termination factor which is divided into three regions N, M and a C-terminal eEF1a-like region essential for translation termination. Sup35NM is a non-pathogenic prion-like protein with the property of aggregating into polymer-like fibrils. Pssm-ID: 293906 [Multi-domain] Cd Length: 82 Bit Score: 56.72 E-value: 3.46e-10
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| PRK13351 | PRK13351 | elongation factor G-like protein; |
172-318 | 5.90e-10 | |||||||
elongation factor G-like protein; Pssm-ID: 237358 [Multi-domain] Cd Length: 687 Bit Score: 62.28 E-value: 5.90e-10
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| PRK10512 | PRK10512 | selenocysteinyl-tRNA-specific translation factor; Provisional |
174-359 | 1.51e-09 | |||||||
selenocysteinyl-tRNA-specific translation factor; Provisional Pssm-ID: 182508 [Multi-domain] Cd Length: 614 Bit Score: 60.83 E-value: 1.51e-09
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| LepA | cd01890 | LepA also known as Elongation Factor 4 (EF4); LepA (also known as elongation factor 4, EF4) ... |
170-362 | 1.80e-09 | |||||||
LepA also known as Elongation Factor 4 (EF4); LepA (also known as elongation factor 4, EF4) belongs to the GTPase family and exhibits significant homology to the translation factors EF-G and EF-Tu, indicating its possible involvement in translation and association with the ribosome. LepA is ubiquitous in bacteria and eukaryota (e.g. yeast GUF1p), but is missing from archaea. This pattern of phyletic distribution suggests that LepA evolved through a duplication of the EF-G gene in bacteria, followed by early transfer into the eukaryotic lineage, most likely from the promitochondrial endosymbiont. Yeast GUF1p is not essential and mutant cells did not reveal any marked phenotype. Pssm-ID: 206677 [Multi-domain] Cd Length: 179 Bit Score: 57.16 E-value: 1.80e-09
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| IF2_eIF5B | cd01887 | Initiation Factor 2 (IF2)/ eukaryotic Initiation Factor 5B (eIF5B) family; IF2/eIF5B ... |
172-359 | 4.87e-09 | |||||||
Initiation Factor 2 (IF2)/ eukaryotic Initiation Factor 5B (eIF5B) family; IF2/eIF5B contribute to ribosomal subunit joining and function as GTPases that are maximally activated by the presence of both ribosomal subunits. As seen in other GTPases, IF2/IF5B undergoes conformational changes between its GTP- and GDP-bound states. Eukaryotic IF2/eIF5Bs possess three characteristic segments, including a divergent N-terminal region followed by conserved central and C-terminal segments. This core region is conserved among all known eukaryotic and archaeal IF2/eIF5Bs and eubacterial IF2s. Pssm-ID: 206674 [Multi-domain] Cd Length: 169 Bit Score: 55.94 E-value: 4.87e-09
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| EF-G_bact | cd04170 | Elongation factor G (EF-G) family; Translocation is mediated by EF-G (also called translocase). ... |
169-340 | 9.97e-09 | |||||||
Elongation factor G (EF-G) family; Translocation is mediated by EF-G (also called translocase). The structure of EF-G closely resembles that of the complex between EF-Tu and tRNA. This is an example of molecular mimicry; a protein domain evolved so that it mimics the shape of a tRNA molecule. EF-G in the GTP form binds to the ribosome, primarily through the interaction of its EF-Tu-like domain with the 50S subunit. The binding of EF-G to the ribosome in this manner stimulates the GTPase activity of EF-G. On GTP hydrolysis, EF-G undergoes a conformational change that forces its arm deeper into the A site on the 30S subunit. To accommodate this domain, the peptidyl-tRNA in the A site moves to the P site, carrying the mRNA and the deacylated tRNA with it. The ribosome may be prepared for these rearrangements by the initial binding of EF-G as well. The dissociation of EF-G leaves the ribosome ready to accept the next aminoacyl-tRNA into the A site. This group contains only bacterial members. Pssm-ID: 206733 [Multi-domain] Cd Length: 268 Bit Score: 56.83 E-value: 9.97e-09
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| FusA | COG0480 | Translation elongation factor EF-G, a GTPase [Translation, ribosomal structure and biogenesis]; ... |
170-277 | 1.42e-08 | |||||||
Translation elongation factor EF-G, a GTPase [Translation, ribosomal structure and biogenesis]; Translation elongation factor EF-G, a GTPase is part of the Pathway/BioSystem: Translation factors Pssm-ID: 440248 [Multi-domain] Cd Length: 693 Bit Score: 57.75 E-value: 1.42e-08
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| PRK10218 | PRK10218 | translational GTPase TypA; |
169-476 | 3.41e-08 | |||||||
translational GTPase TypA; Pssm-ID: 104396 [Multi-domain] Cd Length: 607 Bit Score: 56.64 E-value: 3.41e-08
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| Ras_like_GTPase | cd00882 | Rat sarcoma (Ras)-like superfamily of small guanosine triphosphatases (GTPases); Ras-like ... |
171-371 | 3.53e-08 | |||||||
Rat sarcoma (Ras)-like superfamily of small guanosine triphosphatases (GTPases); Ras-like GTPase superfamily. The Ras-like superfamily of small GTPases consists of several families with an extremely high degree of structural and functional similarity. The Ras superfamily is divided into at least four families in eukaryotes: the Ras, Rho, Rab, and Sar1/Arf families. This superfamily also includes proteins like the GTP translation factors, Era-like GTPases, and G-alpha chain of the heterotrimeric G proteins. Members of the Ras superfamily regulate a wide variety of cellular functions: the Ras family regulates gene expression, the Rho family regulates cytoskeletal reorganization and gene expression, the Rab and Sar1/Arf families regulate vesicle trafficking, and the Ran family regulates nucleocytoplasmic transport and microtubule organization. The GTP translation factor family regulates initiation, elongation, termination, and release in translation, and the Era-like GTPase family regulates cell division, sporulation, and DNA replication. Members of the Ras superfamily are identified by the GTP binding site, which is made up of five characteristic sequence motifs, and the switch I and switch II regions. Pssm-ID: 206648 [Multi-domain] Cd Length: 161 Bit Score: 53.23 E-value: 3.53e-08
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| Snu114p | cd04167 | Snu114p, a spliceosome protein, is a GTPase; Snu114p subfamily. Snu114p is one of several ... |
172-278 | 4.07e-08 | |||||||
Snu114p, a spliceosome protein, is a GTPase; Snu114p subfamily. Snu114p is one of several proteins that make up the U5 small nuclear ribonucleoprotein (snRNP) particle. U5 is a component of the spliceosome, which catalyzes the splicing of pre-mRNA to remove introns. Snu114p is homologous to EF-2, but typically contains an additional N-terminal domain not found in Ef-2. This protein is part of the GTP translation factor family and the Ras superfamily, characterized by five G-box motifs. Pssm-ID: 206730 [Multi-domain] Cd Length: 213 Bit Score: 54.20 E-value: 4.07e-08
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| eIF2_gamma | cd01888 | Gamma subunit of initiation factor 2 (eIF2 gamma); eIF2 is a heterotrimeric translation ... |
173-330 | 1.00e-07 | |||||||
Gamma subunit of initiation factor 2 (eIF2 gamma); eIF2 is a heterotrimeric translation initiation factor that consists of alpha, beta, and gamma subunits. The GTP-bound gamma subunit also binds initiator methionyl-tRNA and delivers it to the 40S ribosomal subunit. Following hydrolysis of GTP to GDP, eIF2:GDP is released from the ribosome. The gamma subunit has no intrinsic GTPase activity, but is stimulated by the GTPase activating protein (GAP) eIF5, and GDP/GTP exchange is stimulated by the guanine nucleotide exchange factor (GEF) eIF2B. eIF2B is a heteropentamer, and the epsilon chain binds eIF2. Both eIF5 and eIF2B-epsilon are known to bind strongly to eIF2-beta, but have also been shown to bind directly to eIF2-gamma. It is possible that eIF2-beta serves simply as a high-affinity docking site for eIF5 and eIF2B-epsilon, or that eIF2-beta serves a regulatory role. eIF2-gamma is found only in eukaryotes and archaea. It is closely related to SelB, the selenocysteine-specific elongation factor from eubacteria. The translational factor components of the ternary complex, IF2 in eubacteria and eIF2 in eukaryotes are not the same protein (despite their unfortunately similar names). Both factors are GTPases; however, eubacterial IF-2 is a single polypeptide, while eIF2 is heterotrimeric. eIF2-gamma is a member of the same family as eubacterial IF2, but the two proteins are only distantly related. This family includes translation initiation, elongation, and release factors. Pssm-ID: 206675 [Multi-domain] Cd Length: 197 Bit Score: 52.66 E-value: 1.00e-07
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| PRK04000 | PRK04000 | translation initiation factor IF-2 subunit gamma; Validated |
172-329 | 1.34e-07 | |||||||
translation initiation factor IF-2 subunit gamma; Validated Pssm-ID: 235194 [Multi-domain] Cd Length: 411 Bit Score: 54.09 E-value: 1.34e-07
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| TypA | COG1217 | Predicted membrane GTPase TypA/BipA involved in stress response [Signal transduction ... |
175-316 | 3.75e-07 | |||||||
Predicted membrane GTPase TypA/BipA involved in stress response [Signal transduction mechanisms]; Pssm-ID: 440830 [Multi-domain] Cd Length: 606 Bit Score: 53.10 E-value: 3.75e-07
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| EF-G | cd01886 | Elongation factor G (EF-G) family involved in both the elongation and ribosome recycling ... |
175-258 | 1.60e-06 | |||||||
Elongation factor G (EF-G) family involved in both the elongation and ribosome recycling phases of protein synthesis; Translocation is mediated by EF-G (also called translocase). The structure of EF-G closely resembles that of the complex between EF-Tu and tRNA. This is an example of molecular mimicry; a protein domain evolved so that it mimics the shape of a tRNA molecule. EF-G in the GTP form binds to the ribosome, primarily through the interaction of its EF-Tu-like domain with the 50S subunit. The binding of EF-G to the ribosome in this manner stimulates the GTPase activity of EF-G. On GTP hydrolysis, EF-G undergoes a conformational change that forces its arm deeper into the A site on the 30S subunit. To accommodate this domain, the peptidyl-tRNA in the A site moves to the P site, carrying the mRNA and the deacylated tRNA with it. The ribosome may be prepared for these rearrangements by the initial binding of EF-G as well. The dissociation of EF-G leaves the ribosome ready to accept the next aminoacyl-tRNA into the A site. This group contains both eukaryotic and bacterial members. Pssm-ID: 206673 [Multi-domain] Cd Length: 270 Bit Score: 49.80 E-value: 1.60e-06
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| PRK04004 | PRK04004 | translation initiation factor IF-2; Validated |
171-359 | 1.93e-05 | |||||||
translation initiation factor IF-2; Validated Pssm-ID: 235195 [Multi-domain] Cd Length: 586 Bit Score: 47.48 E-value: 1.93e-05
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| SelB_II | cd03696 | Domain II of elongation factor SelB; This subfamily represents the domain of elongation factor ... |
421-491 | 2.41e-05 | |||||||
Domain II of elongation factor SelB; This subfamily represents the domain of elongation factor SelB that is homologous to domain II of EF-Tu. SelB may function by replacing EF-Tu. In prokaryotes, the incorporation of selenocysteine as the 21st amino acid, encoded by TGA, requires several elements: SelC is the tRNA itself, SelD acts as a donor of reduced selenium, SelA modifies a serine residue on SelC into selenocysteine, and SelB is a selenocysteine-specific translation elongation factor. 3' or 5' non-coding elements of mRNA have been found as probable structures for directing selenocysteine incorporation. Pssm-ID: 293897 [Multi-domain] Cd Length: 83 Bit Score: 42.90 E-value: 2.41e-05
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| small_GTP | TIGR00231 | small GTP-binding protein domain; Proteins with a small GTP-binding domain recognized by this ... |
171-335 | 2.45e-05 | |||||||
small GTP-binding protein domain; Proteins with a small GTP-binding domain recognized by this model include Ras, RhoA, Rab11, translation elongation factor G, translation initiation factor IF-2, tetratcycline resistance protein TetM, CDC42, Era, ADP-ribosylation factors, tdhF, and many others. In some proteins the domain occurs more than once.This model recognizes a large number of small GTP-binding proteins and related domains in larger proteins. Note that the alpha chains of heterotrimeric G proteins are larger proteins in which the NKXD motif is separated from the GxxxxGK[ST] motif (P-loop) by a long insert and are not easily detected by this model. [Unknown function, General] Pssm-ID: 272973 [Multi-domain] Cd Length: 162 Bit Score: 45.06 E-value: 2.45e-05
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| CysN_NodQ_II | cd03695 | Domain II of the large subunit of ATP sulfurylase; This subfamily represents domain II of the ... |
421-494 | 4.78e-05 | |||||||
Domain II of the large subunit of ATP sulfurylase; This subfamily represents domain II of the large subunit of ATP sulfurylase (ATPS): CysN or the N-terminal portion of NodQ, found mainly in proteobacteria and homologous to the domain II of EF-Tu. Escherichia coli ATPS consists of CysN and a smaller subunit CysD. ATPS produces adenosine-5'-phosphosulfate (APS) from ATP and sulfate, coupled with GTP hydrolysis. In the subsequent reaction, APS is phosphorylated by an APS kinase (CysC), to produce 3'-phosphoadenosine-5'-phosphosulfate (PAPS) for use in amino acid (aa) biosynthesis. The Rhizobiaceae group (alpha-proteobacteria) appears to carry out the same chemistry for the sulfation of a nodulation factor. In Rhizobium meliloti, the heterodimeric complex comprised of NodP and NodQ appears to possess both ATPS and APS kinase activities. The N and C termini of NodQ correspond to CysN and CysC, respectively. Other eubacteria, archaea, and eukaryotes use a different ATP sulfurylase, which shows no amino acid sequence similarity to CysN or NodQ. CysN and the N-terminal portion of NodQ show similarity to GTPases involved in translation, in particular, EF-Tu and EF-1alpha. Pssm-ID: 293896 [Multi-domain] Cd Length: 81 Bit Score: 42.17 E-value: 4.78e-05
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| PTZ00416 | PTZ00416 | elongation factor 2; Provisional |
172-278 | 1.65e-04 | |||||||
elongation factor 2; Provisional Pssm-ID: 240409 [Multi-domain] Cd Length: 836 Bit Score: 44.65 E-value: 1.65e-04
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| EF2 | cd01885 | Elongation Factor 2 (EF2) in archaea and eukarya; Translocation requires hydrolysis of a ... |
172-278 | 8.55e-04 | |||||||
Elongation Factor 2 (EF2) in archaea and eukarya; Translocation requires hydrolysis of a molecule of GTP and is mediated by EF-G in bacteria and by eEF2 in eukaryotes. The eukaryotic elongation factor eEF2 is a GTPase involved in the translocation of the peptidyl-tRNA from the A site to the P site on the ribosome. The 95-kDa protein is highly conserved, with 60% amino acid sequence identity between the human and yeast proteins. Two major mechanisms are known to regulate protein elongation and both involve eEF2. First, eEF2 can be modulated by reversible phosphorylation. Increased levels of phosphorylated eEF2 reduce elongation rates presumably because phosphorylated eEF2 fails to bind the ribosomes. Treatment of mammalian cells with agents that raise the cytoplasmic Ca2+ and cAMP levels reduce elongation rates by activating the kinase responsible for phosphorylating eEF2. In contrast, treatment of cells with insulin increases elongation rates by promoting eEF2 dephosphorylation. Second, the protein can be post-translationally modified by ADP-ribosylation. Various bacterial toxins perform this reaction after modification of a specific histidine residue to diphthamide, but there is evidence for endogenous ADP ribosylase activity. Similar to the bacterial toxins, it is presumed that modification by the endogenous enzyme also inhibits eEF2 activity. Pssm-ID: 206672 [Multi-domain] Cd Length: 218 Bit Score: 41.06 E-value: 8.55e-04
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| EngA2 | cd01895 | EngA2 GTPase contains the second domain of EngA; This EngA2 subfamily CD represents the second ... |
170-362 | 3.51e-03 | |||||||
EngA2 GTPase contains the second domain of EngA; This EngA2 subfamily CD represents the second GTPase domain of EngA and its orthologs, which are composed of two adjacent GTPase domains. Since the sequences of the two domains are more similar to each other than to other GTPases, it is likely that an ancient gene duplication, rather than a fusion of evolutionarily distinct GTPases, gave rise to this family. Although the exact function of these proteins has not been elucidated, studies have revealed that the E. coli EngA homolog, Der, and Neisseria gonorrhoeae EngA are essential for cell viability. A recent report suggests that E. coli Der functions in ribosome assembly and stability. Pssm-ID: 206682 [Multi-domain] Cd Length: 174 Bit Score: 38.57 E-value: 3.51e-03
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| GTP_EFTU_D3 | pfam03143 | Elongation factor Tu C-terminal domain; Elongation factor Tu consists of three structural ... |
503-609 | 3.64e-03 | |||||||
Elongation factor Tu C-terminal domain; Elongation factor Tu consists of three structural domains, this is the third domain. This domain adopts a beta barrel structure. This the third domain is involved in binding to both charged tRNA and binding to EF-Ts pfam00889. Pssm-ID: 397314 [Multi-domain] Cd Length: 105 Bit Score: 37.24 E-value: 3.64e-03
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