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Conserved domains on  [gi|2330017|gb|AAC51672|]
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telomerase reverse transcriptase [Homo sapiens]

Protein Classification

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
Telomerase_RBD pfam12009
Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organizms are ...
 460-592 1.41e-61

Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organizms are comprised of tandem simple sequence repeats. The total length of telomeric repeat sequence at each chromosome end is determined in a balance of sequence loss and sequence addition. One major influence on telomere length is the enzyme telomerase. It is a reverse transcriptase that adds these simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. The RNA binding domain of telomerase - TRBD - is made up of twelve alpha helices and two short beta sheets. How telomerase and associated regulatory factors physically interact and function with each other to maintain appropriate telomere length is poorly understood. It is known however that TRBD is involved in formation of the holoenzyme (which performs the telomere extension) in addition to recognition and binding of RNA.


:

Pssm-ID: 463428  Cd Length: 133  Bit Score: 205.81  E-value: 1.41e-61
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017     460 QVYGFVRACLRRLVPPGLWGSRHNERRFLRNTKKFISLGKHAKLSLQELTWKMSVRDCAWLRRSPGVGCVPAAEHRLREE 539
Cdd:pfam12009    1 QVSAFLRAVLRKLIPLELWGSKHNKRVLLKNVDRFIRLRRFESLSLHELMQGLKVSDFPWLGLPTKNSKLSLSDFEKRQE 80

                           90       100       110       120       130
                   ....*....|....*....|....*....|....*....|....*....|...
gi 2330017     540 ILAKFLHWLMSVYVVELLRSFFYVTETTFQKNRLFFYRKSVWSKLQSIGIRQH 592
Cdd:pfam12009   81 LLAEFIYWLFDSLLIPLIRSFFYVTESSTHRNRLFYFRHDVWRKLSEPFLRKL 133
TERT cd01648
TERT: Telomerase reverse transcriptase (TERT). Telomerase is a ribonucleoprotein (RNP) that ...
 825-936 4.90e-41

TERT: Telomerase reverse transcriptase (TERT). Telomerase is a ribonucleoprotein (RNP) that synthesizes telomeric DNA repeats. The telomerase RNA subunit provides the template for synthesis of these repeats. The catalytic subunit of RNP is known as telomerase reverse transcriptase (TERT). The reverse transcriptase (RT) domain is located in the C-terminal region of the TERT polypeptide. Single amino acid substitutions in this region lead to telomere shortening and senescence. Telomerase is an enzyme that, in certain cells, maintains the physical ends of chromosomes (telomeres) during replication. In somatic cells, replication of the lagging strand requires the continual presence of an RNA primer approximately 200 nucleotides upstream, which is complementary to the template strand. Since there is a region of DNA less than 200 base pairs from the end of the chromosome where this is not possible, the chromosome is continually shortened. However, a surplus of repetitive DNA at the chromosome ends protects against the erosion of gene-encoding DNA. Telomerase is not normally expressed in somatic cells. It has been suggested that exogenous TERT may extend the lifespan of, or even immortalize, the cell. However, recent studies have shown that telomerase activity can be induced by a number of oncogenes. Conversely, the oncogene c-myc can be activated in human TERT immortalized cells. Sequence comparisons place the telomerase proteins in the RT family but reveal hallmarks that distinguish them from retroviral and retrotransposon relatives.


:

Pssm-ID: 238826  Cd Length: 119  Bit Score: 146.64  E-value: 4.90e-41
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   825 YVQCQGIPQGSILSTLLCSLCYGDMENKLFAG---IRRDGLLLRLVDDFLLVTPHLTHAKTFLRTLVRG-VPEYGCVVNL 900
Cdd:cd01648   14 YRQKVGIPQGSPLSSLLCSLYYADLENKYLSFldvIDKDSLLLRLVDDFLLITTSLDKAIKFLNLLLRGfINQYKTFVNF 93

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 2330017   901 RKTVVNFPvedealggtaFVQMPAHGLFPWCGLLLD 936
Cdd:cd01648   94 DKTQINFS----------FAQLDSSDLIPWCGLLIN 119
PksD super family cl43841
Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites ...
 22-482 7.06e-03

Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites biosynthesis, transport and catabolism];


The actual alignment was detected with superfamily member COG3321:

Pssm-ID: 442550 [Multi-domain]  Cd Length: 1386  Bit Score: 40.63  E-value: 7.06e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017    22 LPLATFVRR-LGPQGWRLVQRGDPAAFRALVAQCLVCVPWDARPPPAAPSFRQVSCLKELVARVLQRLCERGAKNVLAFG 100
Cdd:COG3321  863 LPTYPFQREdAAAALLAAALAAALAAAAALGALLLAALAAALAAALLALAAAAAAALALAAAALAALLALVALAAAAAAL 942

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   101 FALLDGARGGPPEAFTTSVRSYLPNTVTDALRGSGAWGLLLRRVGDDVLVHLLARCALFVLVAPSCAYQVCGPPLYQLGA 180
Cdd:COG3321  943 LALAAAAAAAAAALAAAEAGALLLLAAAAAAAAAAAAAAAAAAAAAAAAAAAALAAAAALALLAAAALLLAAAAAAAALL 1022

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   181 ATQARPPPHASGPRRRLGCERAWNHSVREAGVPLGLPAPGARRRGGSASRSLPLPKRPRRGAAPEPERTPVGQGSWAHPG 260
Cdd:COG3321 1023 ALAALLAAAAAALAAAAAAAAAAAALAALAAAAAAAAALALALAALLLLAALAELALAAAALALAAALAAAALALALAAL 1102

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   261 RTRGPSDRGFCVVSPARPAEEATSLEGALSGTRHSHPSVGRQHHAGPPSTSRPPRPWDTPCPPVYAETKHFLYSSGDKEQ 340
Cdd:COG3321 1103 AAALLLLALLAALALAAAAAALLALAALLAAAAAAAALAAAAAAAAALALAAAAAALAAALAAALLAAAALLLALALALA 1182

                        330       340       350       360       370       380       390       400
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   341 LRPSFLLSSLRPSLTGARRLVETIFLGSRPWMPGTPRRLPRLPQRYWQMRPLFLELLGNHAQCPYGVLLKTHCPLRAAVT 420
Cdd:COG3321 1183 AALAAALAGLAALLLAALLAALLAALLALALAALAAAAAALLAAAAAAAALALLALAAAAAAVAALAAAAAALLAALAAL 1262

                        410       420       430       440       450       460
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2330017   421 PAAGVCAREKPQGSVAAPEEEDTDPRRLVQLLRQHSSPWQVYGFVRACLRRLVPPGLWGSRH 482
Cdd:COG3321 1263 ALLAAAAGLAALAAAAAAAAAALALAAAAAAAAAALAALLAAAAAAAAAAAAAAAAAALAAA 1324
ps-ssRNAv_RdRp-like super family cl40470
conserved catalytic core domain of RNA-dependent RNA polymerase (RdRp) from the positive-sense ...
 618-729 7.11e-03

conserved catalytic core domain of RNA-dependent RNA polymerase (RdRp) from the positive-sense single-stranded RNA [(+)ssRNA] viruses and closely related viruses; This family contains the catalytic core domain of RdRp of RNA viruses which belong to Group IV of the Baltimore classification system, and are a group of related viruses that have positive-sense (+), single-stranded (ss) genomes made of ribonucleic acid (RNA). RdRp (also known as RNA replicase) catalyzes the replication of RNA from an RNA template; specifically, it catalyzes the synthesis of the RNA strand complementary to a given RNA template. The Baltimore Classification is divided into 7 classes, 3 of which include RNA viruses: Group IV (+) RNA viruses, Group III double-stranded (ds) RNA viruses, and Group V negative-sense (-) RNA viruses. Baltimore groups of viruses differ with respect to the nature of their genome (i.e., the nucleic acid form that is packaged into virions) and correspond to distinct strategies of genome replication and expression. (+) viral RNA is similar to mRNA and thus can be immediately translated by the host cell. (+)ssRNA viruses can also produce (+) copies of the genome from (-) strands of an intermediate dsRNA genome. This acts as both a transcription and a replication process since the replicated RNA is also mRNA. RdRps belong to the expansive class of polymerases containing so-called palm catalytic domains along with the accessory fingers and thumb domains. All RdRps also have six conserved structural motifs (A-F), located in its majority in the palm subdomain (A-E motifs) and the F motif is located on the finger subdomain. All these motifs have been shown to be implicated in RdRp fidelity such as processes of correct incorporation and reorganization of nucleotides. In addition to Group IV viruses, this model also includes Picobirnaviruses (PBVs), members of the family Picobirnaviridae of dsRNA viruses (Baltimore classification Group III), which are bi-segmented dsRNA viruses. The phylogenetic tree of the RdRps of RNA viruses (realm Riboviria) showed that picobirnaviruses are embedded in the branch of diverse (+)RNA viruses; sometimes they are collectively referred to as the picornavirus supergroup. RdRps of members of the family Permutatetraviridae, a distinct group of RNA viruses that encompass a circular permutation within the RdRp palm domain, are not included in this model.


The actual alignment was detected with superfamily member cd01650:

Pssm-ID: 477363 [Multi-domain]  Cd Length: 220  Bit Score: 39.20  E-value: 7.11e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   618 TSRLRFIPKPDGL------RPI--VNMDYVVGARTfrrekraerLTSRVKALFSVLNYE--RARRPGllgASVLglDDIH 687
Cdd:cd01650    1 KARIILIPKKGKPsdpknyRPIslLSVLYKLLEKI---------LANRLRPVLEENILPnqFGFRPG---RSTT--DAIL 66

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 2330017   688 RAWRtfvLRVRAQDPPPELYFVKVDVTGAYDTIPQDRLTEVI 729
Cdd:cd01650   67 LLRE---VIEKAKEKKKSLVLVFLDFEKAFDSVDHEFLLKAL 105
 
Name Accession Description Interval E-value
Telomerase_RBD pfam12009
Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organizms are ...
 460-592 1.41e-61

Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organizms are comprised of tandem simple sequence repeats. The total length of telomeric repeat sequence at each chromosome end is determined in a balance of sequence loss and sequence addition. One major influence on telomere length is the enzyme telomerase. It is a reverse transcriptase that adds these simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. The RNA binding domain of telomerase - TRBD - is made up of twelve alpha helices and two short beta sheets. How telomerase and associated regulatory factors physically interact and function with each other to maintain appropriate telomere length is poorly understood. It is known however that TRBD is involved in formation of the holoenzyme (which performs the telomere extension) in addition to recognition and binding of RNA.


Pssm-ID: 463428  Cd Length: 133  Bit Score: 205.81  E-value: 1.41e-61
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017     460 QVYGFVRACLRRLVPPGLWGSRHNERRFLRNTKKFISLGKHAKLSLQELTWKMSVRDCAWLRRSPGVGCVPAAEHRLREE 539
Cdd:pfam12009    1 QVSAFLRAVLRKLIPLELWGSKHNKRVLLKNVDRFIRLRRFESLSLHELMQGLKVSDFPWLGLPTKNSKLSLSDFEKRQE 80

                           90       100       110       120       130
                   ....*....|....*....|....*....|....*....|....*....|...
gi 2330017     540 ILAKFLHWLMSVYVVELLRSFFYVTETTFQKNRLFFYRKSVWSKLQSIGIRQH 592
Cdd:pfam12009   81 LLAEFIYWLFDSLLIPLIRSFFYVTESSTHRNRLFYFRHDVWRKLSEPFLRKL 133
Telomerase_RBD smart00975
Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organisms are ...
 460-594 1.06e-59

Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organisms are comprised of tandem simple sequence repeats. The total length of telomeric repeat sequence at each chromosome end is determined in a balance of sequence loss and sequence addition. One major influence on telomere length is the enzyme telomerase. It is a reverse transcriptase that adds these simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. The RNA binding domain of telomerase - TRBD - is made up of twelve alpha helices and two short beta sheets. How telomerase and associated regulatory factors physically interact and function with each other to maintain appropriate telomere length is poorly understood. It is known however that TRBD is involved in formation of the holoenzyme (which performs the telomere extension) in addition to recognition and binding of RNA.


Pssm-ID: 214948  Cd Length: 136  Bit Score: 200.56  E-value: 1.06e-59
                            10        20        30        40        50        60        70        80
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017      460 QVYGFVRACLRRLVPPGLWGSRHNERRFLRNTKKFISLGKHAKLSLQELTWKMSVRDCAWLRRSPGVG-CVPAAEHRLRE 538
Cdd:smart00975    1 QVVSFLRAILRKLFPLSLWGSRHNKRVFLKNLRRFLSLGRNEKFSLQELMWGIRVSDIPWLAGSKTTTqRVSKSEHEKRQ 80

                            90       100       110       120       130
                    ....*....|....*....|....*....|....*....|....*....|....*.
gi 2330017      539 EILAKFLHWLMSVYVVELLRSFFYVTETTFQKNRLFFYRKSVWSKLQSIGIRQHLK 594
Cdd:smart00975   81 ELLAQFVYWLFDCLVPPLLRSFFYVTESSGQKNKLLYFRHDVWKKLTRPALRRYLE 136
TERT cd01648
TERT: Telomerase reverse transcriptase (TERT). Telomerase is a ribonucleoprotein (RNP) that ...
 825-936 4.90e-41

TERT: Telomerase reverse transcriptase (TERT). Telomerase is a ribonucleoprotein (RNP) that synthesizes telomeric DNA repeats. The telomerase RNA subunit provides the template for synthesis of these repeats. The catalytic subunit of RNP is known as telomerase reverse transcriptase (TERT). The reverse transcriptase (RT) domain is located in the C-terminal region of the TERT polypeptide. Single amino acid substitutions in this region lead to telomere shortening and senescence. Telomerase is an enzyme that, in certain cells, maintains the physical ends of chromosomes (telomeres) during replication. In somatic cells, replication of the lagging strand requires the continual presence of an RNA primer approximately 200 nucleotides upstream, which is complementary to the template strand. Since there is a region of DNA less than 200 base pairs from the end of the chromosome where this is not possible, the chromosome is continually shortened. However, a surplus of repetitive DNA at the chromosome ends protects against the erosion of gene-encoding DNA. Telomerase is not normally expressed in somatic cells. It has been suggested that exogenous TERT may extend the lifespan of, or even immortalize, the cell. However, recent studies have shown that telomerase activity can be induced by a number of oncogenes. Conversely, the oncogene c-myc can be activated in human TERT immortalized cells. Sequence comparisons place the telomerase proteins in the RT family but reveal hallmarks that distinguish them from retroviral and retrotransposon relatives.


Pssm-ID: 238826  Cd Length: 119  Bit Score: 146.64  E-value: 4.90e-41
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   825 YVQCQGIPQGSILSTLLCSLCYGDMENKLFAG---IRRDGLLLRLVDDFLLVTPHLTHAKTFLRTLVRG-VPEYGCVVNL 900
Cdd:cd01648   14 YRQKVGIPQGSPLSSLLCSLYYADLENKYLSFldvIDKDSLLLRLVDDFLLITTSLDKAIKFLNLLLRGfINQYKTFVNF 93

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 2330017   901 RKTVVNFPvedealggtaFVQMPAHGLFPWCGLLLD 936
Cdd:cd01648   94 DKTQINFS----------FAQLDSSDLIPWCGLLIN 119
RVT_1 pfam00078
Reverse transcriptase (RNA-dependent DNA polymerase); A reverse transcriptase gene is usually ...
 798-905 4.64e-07

Reverse transcriptase (RNA-dependent DNA polymerase); A reverse transcriptase gene is usually indicative of a mobile element such as a retrotransposon or retrovirus. Reverse transcriptases occur in a variety of mobile elements, including retrotransposons, retroviruses, group II introns, bacterial msDNAs, hepadnaviruses, and caulimoviruses.


Pssm-ID: 395031 [Multi-domain]  Cd Length: 189  Bit Score: 51.53  E-value: 4.64e-07
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017     798 LNEASSGLFDVFLRFMCHHAVRIRGKSYVQCQGIPQGSILSTLLCSLCygdMeNKLFAGIR-RDGL-LLRLVDDFLLVTP 875
Cdd:pfam00078   70 LDELDRKLTAFTTPPININWNGELSGGRYEWKGLPQGLVLSPALFQLF---M-NELLRPLRkRAGLtLVRYADDILIFSK 145

                           90       100       110
                   ....*....|....*....|....*....|
gi 2330017     876 HLTHAKTFLRTLVRGVPEYGCVVNLRKTVV 905
Cdd:pfam00078  146 SEEEHQEALEEVLEWLKESGLKINPEKTQF 175
PksD COG3321
Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites ...
 22-482 7.06e-03

Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites biosynthesis, transport and catabolism];


Pssm-ID: 442550 [Multi-domain]  Cd Length: 1386  Bit Score: 40.63  E-value: 7.06e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017    22 LPLATFVRR-LGPQGWRLVQRGDPAAFRALVAQCLVCVPWDARPPPAAPSFRQVSCLKELVARVLQRLCERGAKNVLAFG 100
Cdd:COG3321  863 LPTYPFQREdAAAALLAAALAAALAAAAALGALLLAALAAALAAALLALAAAAAAALALAAAALAALLALVALAAAAAAL 942

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   101 FALLDGARGGPPEAFTTSVRSYLPNTVTDALRGSGAWGLLLRRVGDDVLVHLLARCALFVLVAPSCAYQVCGPPLYQLGA 180
Cdd:COG3321  943 LALAAAAAAAAAALAAAEAGALLLLAAAAAAAAAAAAAAAAAAAAAAAAAAAALAAAAALALLAAAALLLAAAAAAAALL 1022

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   181 ATQARPPPHASGPRRRLGCERAWNHSVREAGVPLGLPAPGARRRGGSASRSLPLPKRPRRGAAPEPERTPVGQGSWAHPG 260
Cdd:COG3321 1023 ALAALLAAAAAALAAAAAAAAAAAALAALAAAAAAAAALALALAALLLLAALAELALAAAALALAAALAAAALALALAAL 1102

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   261 RTRGPSDRGFCVVSPARPAEEATSLEGALSGTRHSHPSVGRQHHAGPPSTSRPPRPWDTPCPPVYAETKHFLYSSGDKEQ 340
Cdd:COG3321 1103 AAALLLLALLAALALAAAAAALLALAALLAAAAAAAALAAAAAAAAALALAAAAAALAAALAAALLAAAALLLALALALA 1182

                        330       340       350       360       370       380       390       400
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   341 LRPSFLLSSLRPSLTGARRLVETIFLGSRPWMPGTPRRLPRLPQRYWQMRPLFLELLGNHAQCPYGVLLKTHCPLRAAVT 420
Cdd:COG3321 1183 AALAAALAGLAALLLAALLAALLAALLALALAALAAAAAALLAAAAAAAALALLALAAAAAAVAALAAAAAALLAALAAL 1262

                        410       420       430       440       450       460
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2330017   421 PAAGVCAREKPQGSVAAPEEEDTDPRRLVQLLRQHSSPWQVYGFVRACLRRLVPPGLWGSRH 482
Cdd:COG3321 1263 ALLAAAAGLAALAAAAAAAAAALALAAAAAAAAAALAALLAAAAAAAAAAAAAAAAAALAAA 1324
RT_nLTR_like cd01650
RT_nLTR: Non-LTR (long terminal repeat) retrotransposon and non-LTR retrovirus reverse ...
 618-729 7.11e-03

RT_nLTR: Non-LTR (long terminal repeat) retrotransposon and non-LTR retrovirus reverse transcriptase (RT). This subfamily contains both non-LTR retrotransposons and non-LTR retrovirus RTs. RTs catalyze the conversion of single-stranded RNA into double-stranded DNA for integration into host chromosomes. RT is a multifunctional enzyme with RNA-directed DNA polymerase, DNA directed DNA polymerase and ribonuclease hybrid (RNase H) activities.


Pssm-ID: 238827 [Multi-domain]  Cd Length: 220  Bit Score: 39.20  E-value: 7.11e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   618 TSRLRFIPKPDGL------RPI--VNMDYVVGARTfrrekraerLTSRVKALFSVLNYE--RARRPGllgASVLglDDIH 687
Cdd:cd01650    1 KARIILIPKKGKPsdpknyRPIslLSVLYKLLEKI---------LANRLRPVLEENILPnqFGFRPG---RSTT--DAIL 66

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 2330017   688 RAWRtfvLRVRAQDPPPELYFVKVDVTGAYDTIPQDRLTEVI 729
Cdd:cd01650   67 LLRE---VIEKAKEKKKSLVLVFLDFEKAFDSVDHEFLLKAL 105
 
Name Accession Description Interval E-value
Telomerase_RBD pfam12009
Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organizms are ...
 460-592 1.41e-61

Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organizms are comprised of tandem simple sequence repeats. The total length of telomeric repeat sequence at each chromosome end is determined in a balance of sequence loss and sequence addition. One major influence on telomere length is the enzyme telomerase. It is a reverse transcriptase that adds these simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. The RNA binding domain of telomerase - TRBD - is made up of twelve alpha helices and two short beta sheets. How telomerase and associated regulatory factors physically interact and function with each other to maintain appropriate telomere length is poorly understood. It is known however that TRBD is involved in formation of the holoenzyme (which performs the telomere extension) in addition to recognition and binding of RNA.


Pssm-ID: 463428  Cd Length: 133  Bit Score: 205.81  E-value: 1.41e-61
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017     460 QVYGFVRACLRRLVPPGLWGSRHNERRFLRNTKKFISLGKHAKLSLQELTWKMSVRDCAWLRRSPGVGCVPAAEHRLREE 539
Cdd:pfam12009    1 QVSAFLRAVLRKLIPLELWGSKHNKRVLLKNVDRFIRLRRFESLSLHELMQGLKVSDFPWLGLPTKNSKLSLSDFEKRQE 80

                           90       100       110       120       130
                   ....*....|....*....|....*....|....*....|....*....|...
gi 2330017     540 ILAKFLHWLMSVYVVELLRSFFYVTETTFQKNRLFFYRKSVWSKLQSIGIRQH 592
Cdd:pfam12009   81 LLAEFIYWLFDSLLIPLIRSFFYVTESSTHRNRLFYFRHDVWRKLSEPFLRKL 133
Telomerase_RBD smart00975
Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organisms are ...
 460-594 1.06e-59

Telomerase ribonucleoprotein complex - RNA binding domain; Telomeres in most organisms are comprised of tandem simple sequence repeats. The total length of telomeric repeat sequence at each chromosome end is determined in a balance of sequence loss and sequence addition. One major influence on telomere length is the enzyme telomerase. It is a reverse transcriptase that adds these simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. The RNA binding domain of telomerase - TRBD - is made up of twelve alpha helices and two short beta sheets. How telomerase and associated regulatory factors physically interact and function with each other to maintain appropriate telomere length is poorly understood. It is known however that TRBD is involved in formation of the holoenzyme (which performs the telomere extension) in addition to recognition and binding of RNA.


Pssm-ID: 214948  Cd Length: 136  Bit Score: 200.56  E-value: 1.06e-59
                            10        20        30        40        50        60        70        80
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017      460 QVYGFVRACLRRLVPPGLWGSRHNERRFLRNTKKFISLGKHAKLSLQELTWKMSVRDCAWLRRSPGVG-CVPAAEHRLRE 538
Cdd:smart00975    1 QVVSFLRAILRKLFPLSLWGSRHNKRVFLKNLRRFLSLGRNEKFSLQELMWGIRVSDIPWLAGSKTTTqRVSKSEHEKRQ 80

                            90       100       110       120       130
                    ....*....|....*....|....*....|....*....|....*....|....*.
gi 2330017      539 EILAKFLHWLMSVYVVELLRSFFYVTETTFQKNRLFFYRKSVWSKLQSIGIRQHLK 594
Cdd:smart00975   81 ELLAQFVYWLFDCLVPPLLRSFFYVTESSGQKNKLLYFRHDVWKKLTRPALRRYLE 136
TERT cd01648
TERT: Telomerase reverse transcriptase (TERT). Telomerase is a ribonucleoprotein (RNP) that ...
 825-936 4.90e-41

TERT: Telomerase reverse transcriptase (TERT). Telomerase is a ribonucleoprotein (RNP) that synthesizes telomeric DNA repeats. The telomerase RNA subunit provides the template for synthesis of these repeats. The catalytic subunit of RNP is known as telomerase reverse transcriptase (TERT). The reverse transcriptase (RT) domain is located in the C-terminal region of the TERT polypeptide. Single amino acid substitutions in this region lead to telomere shortening and senescence. Telomerase is an enzyme that, in certain cells, maintains the physical ends of chromosomes (telomeres) during replication. In somatic cells, replication of the lagging strand requires the continual presence of an RNA primer approximately 200 nucleotides upstream, which is complementary to the template strand. Since there is a region of DNA less than 200 base pairs from the end of the chromosome where this is not possible, the chromosome is continually shortened. However, a surplus of repetitive DNA at the chromosome ends protects against the erosion of gene-encoding DNA. Telomerase is not normally expressed in somatic cells. It has been suggested that exogenous TERT may extend the lifespan of, or even immortalize, the cell. However, recent studies have shown that telomerase activity can be induced by a number of oncogenes. Conversely, the oncogene c-myc can be activated in human TERT immortalized cells. Sequence comparisons place the telomerase proteins in the RT family but reveal hallmarks that distinguish them from retroviral and retrotransposon relatives.


Pssm-ID: 238826  Cd Length: 119  Bit Score: 146.64  E-value: 4.90e-41
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   825 YVQCQGIPQGSILSTLLCSLCYGDMENKLFAG---IRRDGLLLRLVDDFLLVTPHLTHAKTFLRTLVRG-VPEYGCVVNL 900
Cdd:cd01648   14 YRQKVGIPQGSPLSSLLCSLYYADLENKYLSFldvIDKDSLLLRLVDDFLLITTSLDKAIKFLNLLLRGfINQYKTFVNF 93

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 2330017   901 RKTVVNFPvedealggtaFVQMPAHGLFPWCGLLLD 936
Cdd:cd01648   94 DKTQINFS----------FAQLDSSDLIPWCGLLIN 119
RVT_1 pfam00078
Reverse transcriptase (RNA-dependent DNA polymerase); A reverse transcriptase gene is usually ...
 798-905 4.64e-07

Reverse transcriptase (RNA-dependent DNA polymerase); A reverse transcriptase gene is usually indicative of a mobile element such as a retrotransposon or retrovirus. Reverse transcriptases occur in a variety of mobile elements, including retrotransposons, retroviruses, group II introns, bacterial msDNAs, hepadnaviruses, and caulimoviruses.


Pssm-ID: 395031 [Multi-domain]  Cd Length: 189  Bit Score: 51.53  E-value: 4.64e-07
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017     798 LNEASSGLFDVFLRFMCHHAVRIRGKSYVQCQGIPQGSILSTLLCSLCygdMeNKLFAGIR-RDGL-LLRLVDDFLLVTP 875
Cdd:pfam00078   70 LDELDRKLTAFTTPPININWNGELSGGRYEWKGLPQGLVLSPALFQLF---M-NELLRPLRkRAGLtLVRYADDILIFSK 145

                           90       100       110
                   ....*....|....*....|....*....|
gi 2330017     876 HLTHAKTFLRTLVRGVPEYGCVVNLRKTVV 905
Cdd:pfam00078  146 SEEEHQEALEEVLEWLKESGLKINPEKTQF 175
RT_G2_intron cd01651
RT_G2_intron: Reverse transcriptases (RTs) with group II intron origin. RT transcribes DNA ...
 830-910 1.69e-03

RT_G2_intron: Reverse transcriptases (RTs) with group II intron origin. RT transcribes DNA using RNA as template. Proteins in this subfamily are found in bacterial and mitochondrial group II introns. Their most probable ancestor was a retrotransposable element with both gag-like and pol-like genes. This subfamily of proteins appears to have captured the RT sequences from transposable elements, which lack long terminal repeats (LTRs).


Pssm-ID: 238828 [Multi-domain]  Cd Length: 226  Bit Score: 41.42  E-value: 1.69e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   830 GIPQGSILSTLLCSLCYGDMENKLFAGIR----------RDGLLLRLVDDFLLVTPHLTHAKTFLRTLVRGVPEYGCVVN 899
Cdd:cd01651  126 GTPQGGVISPLLANIYLHELDKFVEEKLKeyydtsdpkfRRLRYVRYADDFVIGVRGPKEAEEIKELIREFLEELGLELN 205

                         90
                 ....*....|..
gi 2330017   900 LRKT-VVNFPVE 910
Cdd:cd01651  206 PEKTrITHFKSE 217
RT_Bac_retron_I cd01646
RT_Bac_retron_I: Reverse transcriptases (RTs) in bacterial retrotransposons or retrons. The ...
 830-908 1.86e-03

RT_Bac_retron_I: Reverse transcriptases (RTs) in bacterial retrotransposons or retrons. The polymerase reaction of this enzyme leads to the production of a unique RNA-DNA complex called msDNA (multicopy single-stranded (ss)DNA) in which a small ssDNA branches out from a small ssRNA molecule via a 2'-5'phosphodiester linkage. Bacterial retron RTs produce cDNA corresponding to only a small portion of the retron genome.


Pssm-ID: 238824 [Multi-domain]  Cd Length: 158  Bit Score: 40.01  E-value: 1.86e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   830 GIPQGSILSTLLC--SLCYGD--MENKLfagirRDGLLLRLVDDFLLVTPHLTHAKTFLRTLVRGVPEYGCVVNLRKT-V 904
Cdd:cd01646   53 GLPIGPLTSRFLAniYLNDVDheLKSKL-----KGVDYVRYVDDIRIFADSKEEAEEILEELKEFLAELGLSLNLSKTeI 127


                 ....
gi 2330017   905 VNFP 908
Cdd:cd01646  128 LPLP 131
PksD COG3321
Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites ...
 22-482 7.06e-03

Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites biosynthesis, transport and catabolism];


Pssm-ID: 442550 [Multi-domain]  Cd Length: 1386  Bit Score: 40.63  E-value: 7.06e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017    22 LPLATFVRR-LGPQGWRLVQRGDPAAFRALVAQCLVCVPWDARPPPAAPSFRQVSCLKELVARVLQRLCERGAKNVLAFG 100
Cdd:COG3321  863 LPTYPFQREdAAAALLAAALAAALAAAAALGALLLAALAAALAAALLALAAAAAAALALAAAALAALLALVALAAAAAAL 942

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   101 FALLDGARGGPPEAFTTSVRSYLPNTVTDALRGSGAWGLLLRRVGDDVLVHLLARCALFVLVAPSCAYQVCGPPLYQLGA 180
Cdd:COG3321  943 LALAAAAAAAAAALAAAEAGALLLLAAAAAAAAAAAAAAAAAAAAAAAAAAAALAAAAALALLAAAALLLAAAAAAAALL 1022

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   181 ATQARPPPHASGPRRRLGCERAWNHSVREAGVPLGLPAPGARRRGGSASRSLPLPKRPRRGAAPEPERTPVGQGSWAHPG 260
Cdd:COG3321 1023 ALAALLAAAAAALAAAAAAAAAAAALAALAAAAAAAAALALALAALLLLAALAELALAAAALALAAALAAAALALALAAL 1102

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   261 RTRGPSDRGFCVVSPARPAEEATSLEGALSGTRHSHPSVGRQHHAGPPSTSRPPRPWDTPCPPVYAETKHFLYSSGDKEQ 340
Cdd:COG3321 1103 AAALLLLALLAALALAAAAAALLALAALLAAAAAAAALAAAAAAAAALALAAAAAALAAALAAALLAAAALLLALALALA 1182

                        330       340       350       360       370       380       390       400
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   341 LRPSFLLSSLRPSLTGARRLVETIFLGSRPWMPGTPRRLPRLPQRYWQMRPLFLELLGNHAQCPYGVLLKTHCPLRAAVT 420
Cdd:COG3321 1183 AALAAALAGLAALLLAALLAALLAALLALALAALAAAAAALLAAAAAAAALALLALAAAAAAVAALAAAAAALLAALAAL 1262

                        410       420       430       440       450       460
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2330017   421 PAAGVCAREKPQGSVAAPEEEDTDPRRLVQLLRQHSSPWQVYGFVRACLRRLVPPGLWGSRH 482
Cdd:COG3321 1263 ALLAAAAGLAALAAAAAAAAAALALAAAAAAAAAALAALLAAAAAAAAAAAAAAAAAALAAA 1324
RT_nLTR_like cd01650
RT_nLTR: Non-LTR (long terminal repeat) retrotransposon and non-LTR retrovirus reverse ...
 618-729 7.11e-03

RT_nLTR: Non-LTR (long terminal repeat) retrotransposon and non-LTR retrovirus reverse transcriptase (RT). This subfamily contains both non-LTR retrotransposons and non-LTR retrovirus RTs. RTs catalyze the conversion of single-stranded RNA into double-stranded DNA for integration into host chromosomes. RT is a multifunctional enzyme with RNA-directed DNA polymerase, DNA directed DNA polymerase and ribonuclease hybrid (RNase H) activities.


Pssm-ID: 238827 [Multi-domain]  Cd Length: 220  Bit Score: 39.20  E-value: 7.11e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2330017   618 TSRLRFIPKPDGL------RPI--VNMDYVVGARTfrrekraerLTSRVKALFSVLNYE--RARRPGllgASVLglDDIH 687
Cdd:cd01650    1 KARIILIPKKGKPsdpknyRPIslLSVLYKLLEKI---------LANRLRPVLEENILPnqFGFRPG---RSTT--DAIL 66

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 2330017   688 RAWRtfvLRVRAQDPPPELYFVKVDVTGAYDTIPQDRLTEVI 729
Cdd:cd01650   67 LLRE---VIEKAKEKKKSLVLVFLDFEKAFDSVDHEFLLKAL 105
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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