tRNA sulfurtransferase catalyzes the ATP-dependent transfer of sulfur to tRNA to produce 4-thiouridine, which is important for tRNA stability, as well as to sulfur carrier protein ThiS, forming ThiS-thiocarboxylate, as part of thiamine biosynthesis
Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) [Coenzyme ...
3-385
0e+00
Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) [Coenzyme transport and metabolism, Translation, ribosomal structure and biogenesis]; Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) is part of the Pathway/BioSystem: Thiamine biosynthesis
:
Pssm-ID: 440070 [Multi-domain] Cd Length: 382 Bit Score: 576.65 E-value: 0e+00
Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) [Coenzyme ...
3-385
0e+00
Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) [Coenzyme transport and metabolism, Translation, ribosomal structure and biogenesis]; Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) is part of the Pathway/BioSystem: Thiamine biosynthesis
Pssm-ID: 440070 [Multi-domain] Cd Length: 382 Bit Score: 576.65 E-value: 0e+00
tRNA sulfurtransferase ThiI; Members of this protein family are "ThiI", a sulfurtransferase ...
6-371
6.09e-126
tRNA sulfurtransferase ThiI; Members of this protein family are "ThiI", a sulfurtransferase involved in 4-thiouridine modification of tRNA. This protein often is bifunctional, with genetically separable activities, where the C-terminal rhodanese-like domain (residues 385 to 482 in E. coli ThiI), a domain not included in this model, is sufficient to synthesize the thiazole moiety of thiamine (see TIGR04271). Note that ThiI, because of its role in tRNA modification, may occur in species (such as Mycoplasma genitalium) that lack de novo thiamine biosynthesis. [Biosynthesis of cofactors, prosthetic groups, and carriers, Thiamine, Protein synthesis, tRNA and rRNA base modification]
Pssm-ID: 273025 [Multi-domain] Cd Length: 371 Bit Score: 368.27 E-value: 6.09e-126
pyrophosphatase domain of thiamine biosynthesis protein ThiI; ThiI is required for thiazole ...
175-358
7.84e-91
pyrophosphatase domain of thiamine biosynthesis protein ThiI; ThiI is required for thiazole synthesis in the thiamine biosynthesis pathway. ThiI is also responsible for the 4-thiouridine (S4U) modification at position 8 in some prokaryotic tRNAs. ThiI contains a PP-loop pyrophosphatase domain which binds ATP and activates tRNA by adenylation. The PP-loop pyrophosphatase catalytic domain of ThiI proteins is always accompanied by a THUMP domain towards the N terminus. THUMP domains are predicted to bind RNA and are widespread in bacteria, archaea, and eukaryotes. The acronym was derived from the names of RNA-modifying enzymes in which this domain is found, namely, thiouridine synthases (ThiI), methylases, and archaeal pseudouridine synthases. ThiI proteins from gamma-proteobacteria and from archaea of the genus Thermoplasma also contain a C-terminal extension of approximately 100 amino acid residues which accepts sulfur in the form of a persulfide on a cysteine residue. This persulfide is responsible for a nucleophilic attack of the adenylated tRNA substrate, completing the sulfur insertion forming a disulfide-bridge between the rhodanese-like domain and a second cysteine residue located in the PP-loop domain. The reaction releases AMP and modified tRNA, and leaves the enzyme in an oxidized state. The disulfide is then reductively cleaved to complete the enzymatic cycle. The pyrophosphatase domain of ThiI belongs to the adenine nucleotide hydrolase (AANH) superfamily and it binds to adenosine nucleotide.
Pssm-ID: 467485 [Multi-domain] Cd Length: 185 Bit Score: 271.73 E-value: 7.84e-91
The THUMP domain is named after after thiouridine synthases, methylases and PSUSs; The THUMP ...
84-165
6.94e-18
The THUMP domain is named after after thiouridine synthases, methylases and PSUSs; The THUMP domain consists of about 110 amino acid residues. The structure of ThiI reveals that the THUMP has a fold unlike that of previously characterised RNA-binding domains. It is predicted that this domain is an RNA-binding domain The THUMP domain probably functions by delivering a variety of RNA modification enzymes to their targets.
Pssm-ID: 214952 [Multi-domain] Cd Length: 83 Bit Score: 77.70 E-value: 6.94e-18
Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) [Coenzyme ...
3-385
0e+00
Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) [Coenzyme transport and metabolism, Translation, ribosomal structure and biogenesis]; Adenylyl- and sulfurtransferase ThiI (thiamine and tRNA 4-thiouridine biosynthesis) is part of the Pathway/BioSystem: Thiamine biosynthesis
Pssm-ID: 440070 [Multi-domain] Cd Length: 382 Bit Score: 576.65 E-value: 0e+00
tRNA sulfurtransferase ThiI; Members of this protein family are "ThiI", a sulfurtransferase ...
6-371
6.09e-126
tRNA sulfurtransferase ThiI; Members of this protein family are "ThiI", a sulfurtransferase involved in 4-thiouridine modification of tRNA. This protein often is bifunctional, with genetically separable activities, where the C-terminal rhodanese-like domain (residues 385 to 482 in E. coli ThiI), a domain not included in this model, is sufficient to synthesize the thiazole moiety of thiamine (see TIGR04271). Note that ThiI, because of its role in tRNA modification, may occur in species (such as Mycoplasma genitalium) that lack de novo thiamine biosynthesis. [Biosynthesis of cofactors, prosthetic groups, and carriers, Thiamine, Protein synthesis, tRNA and rRNA base modification]
Pssm-ID: 273025 [Multi-domain] Cd Length: 371 Bit Score: 368.27 E-value: 6.09e-126
pyrophosphatase domain of thiamine biosynthesis protein ThiI; ThiI is required for thiazole ...
175-358
7.84e-91
pyrophosphatase domain of thiamine biosynthesis protein ThiI; ThiI is required for thiazole synthesis in the thiamine biosynthesis pathway. ThiI is also responsible for the 4-thiouridine (S4U) modification at position 8 in some prokaryotic tRNAs. ThiI contains a PP-loop pyrophosphatase domain which binds ATP and activates tRNA by adenylation. The PP-loop pyrophosphatase catalytic domain of ThiI proteins is always accompanied by a THUMP domain towards the N terminus. THUMP domains are predicted to bind RNA and are widespread in bacteria, archaea, and eukaryotes. The acronym was derived from the names of RNA-modifying enzymes in which this domain is found, namely, thiouridine synthases (ThiI), methylases, and archaeal pseudouridine synthases. ThiI proteins from gamma-proteobacteria and from archaea of the genus Thermoplasma also contain a C-terminal extension of approximately 100 amino acid residues which accepts sulfur in the form of a persulfide on a cysteine residue. This persulfide is responsible for a nucleophilic attack of the adenylated tRNA substrate, completing the sulfur insertion forming a disulfide-bridge between the rhodanese-like domain and a second cysteine residue located in the PP-loop domain. The reaction releases AMP and modified tRNA, and leaves the enzyme in an oxidized state. The disulfide is then reductively cleaved to complete the enzymatic cycle. The pyrophosphatase domain of ThiI belongs to the adenine nucleotide hydrolase (AANH) superfamily and it binds to adenosine nucleotide.
Pssm-ID: 467485 [Multi-domain] Cd Length: 185 Bit Score: 271.73 E-value: 7.84e-91
THUMP domain of thiamine biosynthesis protein ThiI; ThiI is an enzyme responsible for the ...
6-171
2.32e-72
THUMP domain of thiamine biosynthesis protein ThiI; ThiI is an enzyme responsible for the formation of the modified base S(4)U (4-thiouridine) found at position 8 in some prokaryotic tRNAs. This modification acts as a signal for UV exposure, triggering a response that provides protection against its damaging effects. ThiI consists of an N-terminal THUMP domain, followed by an NFLD domain, and a C-terminal PP-loop pyrophosphatase domain. The N-terminal THUMP domain has been implicated in the recognition of the acceptor-stem region. The THUMP domain is named after thiouridine synthases, methylases and PSUSs. The domain consists of about 110 amino acid residues. It is predicted to be an RNA-binding domain and probably functions by delivering a variety of RNA modification enzymes to their targets.
Pssm-ID: 212585 Cd Length: 166 Bit Score: 223.86 E-value: 2.32e-72
The THUMP domain is named after after thiouridine synthases, methylases and PSUSs; The THUMP ...
84-165
6.94e-18
The THUMP domain is named after after thiouridine synthases, methylases and PSUSs; The THUMP domain consists of about 110 amino acid residues. The structure of ThiI reveals that the THUMP has a fold unlike that of previously characterised RNA-binding domains. It is predicted that this domain is an RNA-binding domain The THUMP domain probably functions by delivering a variety of RNA modification enzymes to their targets.
Pssm-ID: 214952 [Multi-domain] Cd Length: 83 Bit Score: 77.70 E-value: 6.94e-18
THUMP domain; The THUMP domain is named after after thiouridine synthases, methylases and ...
30-166
1.32e-16
THUMP domain; The THUMP domain is named after after thiouridine synthases, methylases and PSUSs. The THUMP domain consists of about 110 amino acid residues. The structure of ThiI reveals that the THUMP has a fold unlike that of previously characterized RNA-binding domains. It is predicted that this domain is an RNA-binding domain The THUMP domain probably functions by delivering a variety of RNA modification enzymes to their targets.
Pssm-ID: 460749 Cd Length: 143 Bit Score: 76.32 E-value: 1.32e-16
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.
of the residues that compose this conserved feature have been mapped to the query sequence.
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