RP22_VAR67
ID RP22_VAR67 Reviewed; 185 AA.
AC P33054;
DT 01-OCT-1993, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-1993, sequence version 1.
DT 03-AUG-2022, entry version 75.
DE RecName: Full=DNA-directed RNA polymerase 22 kDa subunit;
DE EC=2.7.7.6;
GN Name=RPO22; ORFNames=J4R;
OS Variola virus (isolate Human/India/Ind3/1967) (VARV) (Smallpox virus).
OC Viruses; Varidnaviria; Bamfordvirae; Nucleocytoviricota; Pokkesviricetes;
OC Chitovirales; Poxviridae; Chordopoxvirinae; Orthopoxvirus.
OX NCBI_TaxID=587200;
OH NCBI_TaxID=9606; Homo sapiens (Human).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=8383392; DOI=10.1016/0168-1702(93)90110-9;
RA Shchelkunov S.N., Blinov V.M., Totmenin A.V., Marennikova S.S.,
RA Kolykhalov A.A., Frolov I.V., Chizhikov V.E., Gytorov V.V., Gashikov P.V.,
RA Belanov E.F., Belavin P.A., Resenchuk S.M., Andzhaparidze O.G.,
RA Sandakhchiev L.S.;
RT "Nucleotide sequence analysis of variola virus HindIII M, L, I genome
RT fragments.";
RL Virus Res. 27:25-35(1993).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=8384129; DOI=10.1016/0014-5793(93)80041-r;
RA Shchelkunov S.N., Blinov V.M., Sandakhchiev L.S.;
RT "Genes of variola and vaccinia viruses necessary to overcome the host
RT protective mechanisms.";
RL FEBS Lett. 319:80-83(1993).
CC -!- FUNCTION: Part of the DNA-dependent RNA polymerase which catalyzes the
CC transcription of viral DNA into RNA using the four ribonucleoside
CC triphosphates as substrates. Responsible for the transcription of
CC early, intermediate and late genes. DNA-dependent RNA polymerase
CC associates with the early transcription factor (ETF) thereby allowing
CC the early genes transcription. Late transcription, and probably also
CC intermediate transcription, require newly synthesized RNA polymerase
CC (By similarity). {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate +
CC RNA(n+1); Xref=Rhea:RHEA:21248, Rhea:RHEA-COMP:14527, Rhea:RHEA-
CC COMP:17342, ChEBI:CHEBI:33019, ChEBI:CHEBI:61557, ChEBI:CHEBI:140395;
CC EC=2.7.7.6;
CC -!- SUBUNIT: The DNA-dependent RNA polymerase used for intermediate and
CC late genes expression consists of eight subunits 147 kDa, 133 kDa, 35
CC kDa, 30 kDa, 22 kDa, 19 kDa, 18 kDa and 7 kDa totalling more than 500
CC kDa in mass. The same holoenzyme, with the addition of the
CC transcription-specificity factor RAP94, is used for early gene
CC expression (By similarity). {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Virion {ECO:0000305}. Note=All the enzymes and
CC other proteins required to synthesize early mRNAs are packaged within
CC the virion core along with the DNA genome. This is necessary because
CC viral early mRNAs are synthesized within minutes after virus entry into
CC the cell and are extruded through pores in the core particle (By
CC similarity). {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the poxviridae DNA-directed RNA polymerase 22
CC kDa subunit family. {ECO:0000305}.
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DR EMBL; X67119; CAA47580.1; -; Genomic_DNA.
DR EMBL; S55844; AAB24677.1; -; Genomic_DNA.
DR EMBL; X69198; CAA49022.1; -; Genomic_DNA.
DR PIR; F36845; F36845.
DR RefSeq; NP_042125.1; NC_001611.1.
DR SMR; P33054; -.
DR PRIDE; P33054; -.
DR GeneID; 1486467; -.
DR KEGG; vg:1486467; -.
DR Proteomes; UP000002060; Genome.
DR GO; GO:0000428; C:DNA-directed RNA polymerase complex; IEA:UniProtKB-KW.
DR GO; GO:0003677; F:DNA binding; IEA:InterPro.
DR GO; GO:0003899; F:DNA-directed 5'-3' RNA polymerase activity; IEA:UniProtKB-EC.
DR GO; GO:0019083; P:viral transcription; IEA:InterPro.
DR InterPro; IPR007937; RNA_Pol_22kDa_poxvir.
DR Pfam; PF05273; Pox_RNA_Pol_22; 1.
DR PIRSF; PIRSF000744; RPO22; 1.
PE 3: Inferred from homology;
KW DNA-directed RNA polymerase; Nucleotidyltransferase; Reference proteome;
KW Transcription; Transferase; Virion.
FT CHAIN 1..185
FT /note="DNA-directed RNA polymerase 22 kDa subunit"
FT /id="PRO_0000099141"
SQ SEQUENCE 185 AA; 21354 MW; 2556A64CF315B8AD CRC64;
MNQYNVKYLA KILCIKTEIA RDPYAVINRN VLLRYTTDIQ YNDLVTLITV RHKIDSMKTV
FQVFNESSIN YTPVDDDYGE PIIITSYLQK GHNKFPVNFL YIDVVISDLF PSFVRLNTTE
TNIVNSVLQT GDGKKTLRLP KMLETEIVVK ILYRPNIPLK IVRFFRNNMI TGVEIADRSV
ISVAD