ID   RDRP_CMVFN              Reviewed;         857 AA.
AC   P16490;
DT   01-AUG-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1990, sequence version 1.
DT   29-SEP-2021, entry version 76.
DE   RecName: Full=RNA-directed RNA polymerase 2a;
DE            Short=protein 2a;
DE            EC=2.7.7.48;
GN   ORFNames=ORF2a;
OS   Cucumber mosaic virus (strain FNY) (CMV).
OC   Viruses; Riboviria; Orthornavirae; Kitrinoviricota; Alsuviricetes;
OC   Martellivirales; Bromoviridae; Cucumovirus.
OX   NCBI_TaxID=12307;
OH   NCBI_TaxID=3663; Cucurbita pepo (Vegetable marrow) (Summer squash).
OH   NCBI_TaxID=4097; Nicotiana tabacum (Common tobacco).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX   PubMed=3404113; DOI=10.1099/0022-1317-69-8-1777;
RA   Rizzo T.M., Palukaitis P.;
RT   "Nucleotide sequence and evolutionary relationships of cucumber mosaic
RT   virus (CMV) strains: CMV RNA 2.";
RL   J. Gen. Virol. 69:1777-1787(1988).
CC   -!- FUNCTION: RNA-dependent RNA polymerase which replicates the viral
CC       genome composed of 3 RNA segments, RNA1, RNA2 and RNA3. {ECO:0000305}.
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=2.7.7.48; Evidence={ECO:0000255|PROSITE-ProRule:PRU00539};
CC   -!- SUBUNIT: Interacts with replication protein 1a. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the ssRNA positive-strand viruses RNA-directed
CC       RNA polymerase family. {ECO:0000305}.
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DR   EMBL; D00355; BAA00263.1; -; Genomic_RNA.
DR   PIR; JQ0015; WMVXCU.
DR   RefSeq; NP_049324.1; NC_002035.1.
DR   PRIDE; P16490; -.
DR   GeneID; 962642; -.
DR   KEGG; vg:962642; -.
DR   Proteomes; UP000002502; Genome.
DR   GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-KW.
DR   GO; GO:0003723; F:RNA binding; IEA:InterPro.
DR   GO; GO:0003968; F:RNA-directed 5'-3' RNA polymerase activity; IEA:UniProtKB-KW.
DR   GO; GO:0006351; P:transcription, DNA-templated; IEA:InterPro.
DR   GO; GO:0039694; P:viral RNA genome replication; IEA:InterPro.
DR   InterPro; IPR043502; DNA/RNA_pol_sf.
DR   InterPro; IPR007094; RNA-dir_pol_PSvirus.
DR   InterPro; IPR001788; Tymovirus_RNA-dep_RNA_pol.
DR   Pfam; PF00978; RdRP_2; 1.
DR   SUPFAM; SSF56672; SSF56672; 1.
DR   PROSITE; PS50507; RDRP_SSRNA_POS; 1.
PE   3: Inferred from homology;
KW   Nucleotide-binding; Nucleotidyltransferase; Reference proteome;
KW   RNA-directed RNA polymerase; Transferase; Viral RNA replication.
FT   CHAIN           1..857
FT                   /note="RNA-directed RNA polymerase 2a"
FT                   /id="PRO_0000083273"
FT   DOMAIN          511..624
FT                   /note="RdRp catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00539"
FT   REGION          780..827
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        801..827
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   857 AA;  96710 MW;  5BBA030FE68D7B2B CRC64;
     MAFPAPAFSL ANLLNGSYGV DTPEDVERLR SEQREEAAAA CRNYRPLPAV DVSESVTEDA
     HSLRTPDGAP AEAVSDEFVT YGAEDYLEKS DDELLVAFET MVKPMRIGQL WCPAFNKCSF
     ISSIAMARAL LLAPRTSHRT MKCFEDLVAA IYTKSDFYYS EECEADDAQI DISSRDVPGY
     SFEPWSRTSG FEPPPICEAC DMIMYQCPCF DFNALKKSCA ERTFADDYVI EGLDGVVDNA
     TLLSNLGPFL VPVKCQYEKC PTPTIAIPPD LNRATDRVDI NLVQSICDST LPTHSNYDDS
     FHQVFVESAD YSIDLDHVRL RQSDLIAKIP DSGHMIPVLN TGSGHKRVGT TKEVLTAIKK
     RNADVPELGD SVNLSRLSKA VAERFFISYI NGNSLASSNF VNVVSNFHDY MEKWKSSGLS
     YDDLPDLHAE NLQFYDHMIK SDVKPVVSDT LNIDRPVPAT ITYHKKSITS QFSPLFTALF
     ERFQRCLRER IILPVGKISS LEMAGFDVKN KHCLEIDLSK FDKSQGEFHL LIQEHILNGL
     GCPAPITKWW CDFHRFSYIR DRRAGVGMPI SFQRRTGDAL TYFGNTIVTM AEFAWCYDTD
     QFEKLLFSGD DSLGFSLLPP VGDPSKFTTL FNMEAKVMEP AVPYICSKFL LSDEFGNTFS
     VPDPLREVQR LGTKKIPYSD NDEFLFAHFM SFVDRLKFLD RMSQSCIDQL SIFFELKYKK
     SGEEAALMLG AFKKYTANFQ SYKELYYSDR RQCELINSFC STEFRVERVN SNKQRKNYGI
     ERRCNDKRRT PTGSYGGGEE AETKVSQTES TGTRSQKSQR ESAFKSQTIP LPTVLSSGWF
     GTDRVMPPCE RGGVTRV