ID   RP19_VAR67              Reviewed;         164 AA.
AC   P33813;
DT   01-FEB-1994, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1994, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=DNA-directed RNA polymerase 19 kDa subunit;
DE            EC=2.7.7.6;
GN   Name=RPO19; ORFNames=A5R;
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=1666548;
RA   Shchelkunov S.N., Marennikova S.S., Totmenin A.V., Blinov V.M.,
RA   Chizhikov V.E., Gutorov V.V., Safronov P.F., Pozdnyakov S.G.,
RA   Shelukhina E.M., Gashnikov P.V., Anjaparidze O.G., Sandakhchiev L.S.;
RT   "Creation of a clone library of fragments from the natural variola virus
RT   and study of the structural and functional organization of viral genes from
RT   a circle of hosts.";
RL   Dokl. Akad. Nauk SSSR 321:402-406(1991).
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   -!- INDUCTION: Expressed in the early phase of the viral replicative cycle.
CC       Expression seems to continue throughout virus infection.
CC   -!- SIMILARITY: Belongs to the poxviridae DNA-directed RNA polymerase 19
CC       kDa subunit family. {ECO:0000305}.
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DR   EMBL; X69198; CAA49050.1; -; Genomic_DNA.
DR   EMBL; X67116; CAA47518.1; -; Genomic_DNA.
DR   PIR; F36848; F36848.
DR   RefSeq; NP_042153.1; NC_001611.1.
DR   SMR; P33813; -.
DR   GeneID; 1486535; -.
DR   KEGG; vg:1486535; -.
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:0006351; P:transcription, DNA-templated; IEA:InterPro.
DR   Gene3D; 3.90.940.10; -; 1.
DR   InterPro; IPR007984; DNA-dir_RNA_Pol_19kDa_poxvir.
DR   InterPro; IPR036161; RPB6/omega-like_sf.
DR   Pfam; PF05320; Pox_RNA_Pol_19; 1.
DR   PIRSF; PIRSF000743; RPO19; 1.
PE   2: Evidence at transcript level;
KW   DNA-directed RNA polymerase; Early protein; Nucleotidyltransferase;
KW   Reference proteome; Transcription; Transferase; Virion.
FT   CHAIN           1..164
FT                   /note="DNA-directed RNA polymerase 19 kDa subunit"
FT                   /id="PRO_0000099148"
FT   REGION          1..39
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        1..32
FT                   /note="Acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   164 AA;  18981 MW;  BC7CF3E24740C327 CRC64;
     MADTDDIIDY ESDDLTEYED DDEEEEDGES LETSDIDPKS SYKIVESAST HIEDAHSNLK
     HIGNHISALK RRYTRRISLF EIAGIIAESY NLLQRGRLPL VSEFSNETMK QNMLHVIIQE
     IEEGSCPIVI EKNGELLSVN DFDKDGLKFH LDYIIKIWKL QKRY