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HAMAP rule MF_01323

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General rule information [?]

Accession MF_01323
Dates 6-JAN-2004 (Created)
1-JUN-2023 (Last updated, Version 36)
Name RNApol_bact_RpoC1
Scope(s) Bacteria
Cyanobacteriota
Plastid
Template(s) P22704 (RPOC1_NOSS1); P11705 (RPOC1_SPIOL); [ Recover all ]
Triggered by HAMAP; MF_01323 (Get profile general information and statistics)

Propagated annotation [?]

Identifier, protein and gene names [?]

Identifier RPOC1
case not <OG:Chloroplast>
Protein name RecName: Full=DNA-directed RNA polymerase subunit gamma;
                 Short=RNAP subunit gamma;
                 EC=2.7.7.6;
AltName: Full=RNA polymerase subunit gamma;
AltName: Full=Transcriptase subunit gamma;
else case <OG:Chloroplast>
Protein name RecName: Full=DNA-directed RNA polymerase subunit beta';
                 EC=2.7.7.6;
AltName: Full=PEP;
AltName: Full=Plastid-encoded RNA polymerase subunit beta';
                 Short=RNA polymerase subunit beta';
end case
Gene name Name=rpoC1;

Comments [?]

FUNCTIONDNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.
CATALYTIC ACTIVITY Reaction=a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate + RNA(n+1); Xref=Rhea:RHEA:21248, Rhea:RHEA-COMP:14527, Rhea:RHEA- COMP:17342, ChEBI:CHEBI:33019, ChEBI:CHEBI:61557, ChEBI:CHEBI:140395; EC=2.7.7.6;
case <FTGroup:2>
COFACTOR Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Note=Binds 1 Mg(2+) ion per subunit.;
end case
case <FTGroup:1>
COFACTOR Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Note=Binds 1 Zn(2+) ion per subunit.;
end case
case <OC:Cyanobacteriota>
SUBUNITIn cyanobacteria the RNAP catalytic core is composed of 2 alpha, 1 beta, 1 beta', 1 gamma and 1 omega subunit. When a sigma factor is associated with the core the holoenzyme is formed, which can initiate transcription.
else case <OG:Chloroplast>
SUBUNITIn plastids the minimal PEP RNA polymerase catalytic core is composed of four subunits: alpha, beta, beta', and beta''. When a (nuclear-encoded) sigma factor is associated with the core the holoenzyme is formed, which can initiate transcription.
SUBCELLULAR LOCATIONPlastid, chloroplast.
end case
SIMILARITYBelongs to the RNA polymerase beta' chain family. RpoC1 subfamily.

Keywords [?]

case <FTGroup:1> or <FTGroup:2>
Metal-binding
end case
case <FTGroup:2>
Magnesium
end case
Transcription
Transferase
Nucleotidyltransferase
DNA-directed RNA polymerase
case <FTGroup:1>
Zinc
end case

Gene Ontology [?]

GO:0003677; Molecular function:DNA binding
GO:0003899; Molecular function:DNA-directed 5'-3' RNA polymerase activity
GO:0006351; Biological process:DNA-templated transcription
case <FTGroup:2>
GO:0000287; Molecular function:magnesium ion binding
end case
case <FTGroup:1>
GO:0008270; Molecular function:zinc ion binding
end case
case <OG:Chloroplast>
GO:0009507; Cellular component:chloroplast
end case

Cross-references [?]

Pfam PF04997; RNA_pol_Rpb1_1; 1;
Pfam PF00623; RNA_pol_Rpb1_2; 1-2;
Pfam PF04983; RNA_pol_Rpb1_3; 0-1;
NCBIfam TIGR02387; rpoC1_cyan; 1;

Features [?]

From: RPOC1_NOSS1 (P22704)
Key From To Description Tag Condition FTGroup
BINDING 71 71 /ligand="Zn(2+)"
/ligand_id="ChEBI:CHEBI:29105"
C 1
BINDING 73 73 /ligand="Zn(2+)"
/ligand_id="ChEBI:CHEBI:29105"
C 1
BINDING 86 86 /ligand="Zn(2+)"
/ligand_id="ChEBI:CHEBI:29105"
C 1
BINDING 89 89 /ligand="Zn(2+)"
/ligand_id="ChEBI:CHEBI:29105"
C 1
BINDING 467 467 /ligand="Mg(2+)"
/ligand_id="ChEBI:CHEBI:18420"
D 2
BINDING 469 469 /ligand="Mg(2+)"
/ligand_id="ChEBI:CHEBI:18420"
D 2
BINDING 471 471 /ligand="Mg(2+)"
/ligand_id="ChEBI:CHEBI:18420"
D 2

Additional information [?]

Size range 575-760 amino acids
Related rules MF_01322
Fusion Nter: None Cter: MF_01324 (rpoC2)
Comments In cyanobacteria and plastids, there are two ORFs (this one, rpoC1, MF_01323 and rpoC2, MF_01324) that together are equivalent to the beta' subunit found in all other bacteria (rpoC, MF_01322). However,in the red algae CYAM1 the rpoC1 and rpoC2 genes are fused into one ORF. This seems to be the result of evolution acting to reduce protein size rather than horizontal transfer from a bacteria. Some algal proteins with inserts and C.reinhardtii (where this protein is split in 2) are considered to be atypical.



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