REP7_FBNY1
ID REP7_FBNY1 Reviewed; 283 AA.
AC Q9WIK0;
DT 25-OCT-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1999, sequence version 1.
DT 03-AUG-2022, entry version 93.
DE RecName: Full=Para-Rep C7;
DE Short=Rep7;
DE EC=2.7.7.-;
DE EC=3.1.21.-;
DE EC=3.6.1.-;
DE AltName: Full=ATP-dependent helicase C7;
DE AltName: Full=Replication-associated protein of non-essential DNA C7;
GN Name=C7;
OS Faba bean necrotic yellows virus (isolate Egyptian EV1-93) (FBNYV).
OC Viruses; Monodnaviria; Shotokuvirae; Cressdnaviricota; Arfiviricetes;
OC Mulpavirales; Nanoviridae; Nanovirus.
OX NCBI_TaxID=291603;
OH NCBI_TaxID=3827; Cicer arietinum (Chickpea) (Garbanzo).
OH NCBI_TaxID=3864; Lens culinaris (Lentil) (Cicer lens).
OH NCBI_TaxID=3885; Phaseolus vulgaris (Kidney bean) (French bean).
OH NCBI_TaxID=3906; Vicia faba (Broad bean) (Faba vulgaris).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=9880028; DOI=10.1099/0022-1317-79-12-3101;
RA Katul L., Timchenko T., Gronenborn B., Vetten H.J.;
RT "Ten distinct circular ssDNA components, four of which encode putative
RT replication-associated proteins, are associated with the faba bean necrotic
RT yellows virus genome.";
RL J. Gen. Virol. 79:3101-3109(1998).
RN [2]
RP FUNCTION.
RX PubMed=10559333; DOI=10.1128/jvi.73.12.10173-10182.1999;
RA Timchenko T., de Kouchkovsky F., Katul L., David C., Vetten H.J.,
RA Gronenborn B.;
RT "A single Rep protein initiates replication of multiple genome components
RT of faba bean necrotic yellows virus, a single-stranded DNA virus of
RT plants.";
RL J. Virol. 73:10173-10182(1999).
RN [3]
RP REVIEW.
RX PubMed=14741122; DOI=10.1016/j.vetmic.2003.10.015;
RA Gronenborn B.;
RT "Nanoviruses: genome organisation and protein function.";
RL Vet. Microbiol. 98:103-109(2004).
CC -!- FUNCTION: Initiates and terminates the replication only of its own
CC subviral DNA molecule. The closed circular ssDNA genome is first
CC converted to a superhelical dsDNA. Rep binds a specific hairpin at the
CC genome origin of replication. Introduces an endonucleolytic nick within
CC the intergenic region of the genome, thereby initiating the rolling
CC circle replication (RCR). Following cleavage, binds covalently to the
CC 5'-phosphate of DNA as a tyrosyl ester. The cleavage gives rise to a
CC free 3'-OH that serves as a primer for the cellular DNA polymerase. The
CC polymerase synthesizes the (+) strand DNA by rolling circle mechanism.
CC After one round of replication, a Rep-catalyzed nucleotidyl transfer
CC reaction releases a circular single-stranded virus genome, thereby
CC terminating the replication. Displays origin-specific DNA cleavage,
CC nucleotidyl transferase, ATPase and helicase activities (By
CC similarity). {ECO:0000250, ECO:0000269|PubMed:10559333}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + H2O = ADP + H(+) + phosphate; Xref=Rhea:RHEA:13065,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:456216;
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence={ECO:0000250};
CC Note=Divalent metal cations, possibly Mg(2+) or Mn(2+). {ECO:0000250};
CC -!- SUBUNIT: Homooligomer (Potential). Rep binds to repeated DNA motifs
CC (iterons) (By similarity). {ECO:0000250, ECO:0000305}.
CC -!- SUBCELLULAR LOCATION: Host nucleus {ECO:0000305}.
CC -!- DOMAIN: There are 3 rolling circle replication (RCR) motifs. RCR-2 is
CC probably involved in metal coordination. RCR-3 is required for
CC phosphodiester bond cleavage for initiation of RCR.
CC -!- MISCELLANEOUS: The genome of nanoviruses is composed of six to eight
CC segments. In addition, some isolates contain subviral DNAs.
CC -!- SIMILARITY: Belongs to the nanoviridea/circoviridae replication-
CC associated protein family. {ECO:0000305}.
CC -!- CAUTION: This protein is encoded by a subviral DNA that is not present
CC in all isolates of the virus. {ECO:0000305}.
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DR EMBL; AJ132185; CAB44025.1; -; Genomic_DNA.
DR SMR; Q9WIK0; -.
DR Proteomes; UP000008665; Genome.
DR GO; GO:0042025; C:host cell nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0016887; F:ATP hydrolysis activity; IEA:RHEA.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR GO; GO:0016888; F:endodeoxyribonuclease activity, producing 5'-phosphomonoesters; IEA:InterPro.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0016779; F:nucleotidyltransferase activity; IEA:UniProtKB-KW.
DR GO; GO:0003723; F:RNA binding; IEA:InterPro.
DR GO; GO:0003724; F:RNA helicase activity; IEA:InterPro.
DR GO; GO:0006260; P:DNA replication; IEA:UniProtKB-KW.
DR GO; GO:0018142; P:protein-DNA covalent cross-linking; IEA:InterPro.
DR InterPro; IPR000605; Helicase_SF3_ssDNA/RNA_vir.
DR InterPro; IPR003365; Viral_rep_N.
DR Pfam; PF00910; RNA_helicase; 1.
DR Pfam; PF02407; Viral_Rep; 1.
PE 3: Inferred from homology;
KW ATP-binding; Covalent protein-DNA linkage; DNA replication; DNA-binding;
KW Endonuclease; Helicase; Host nucleus; Hydrolase; Metal-binding;
KW Multifunctional enzyme; Nuclease; Nucleotide-binding;
KW Nucleotidyltransferase; Reference proteome; Transferase.
FT CHAIN 1..283
FT /note="Para-Rep C7"
FT /id="PRO_0000222441"
FT MOTIF 11..14
FT /note="RCR-1"
FT /evidence="ECO:0000250"
FT MOTIF 42..47
FT /note="RCR-2"
FT /evidence="ECO:0000250"
FT MOTIF 51..71
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000255"
FT MOTIF 79..82
FT /note="RCR-3"
FT /evidence="ECO:0000250"
FT MOTIF 96..102
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000255"
FT ACT_SITE 79
FT /note="For DNA cleavage activity"
FT /evidence="ECO:0000250"
FT BINDING 36
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000255"
FT BINDING 42
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000255"
FT BINDING 84
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000255"
FT BINDING 178..180
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
SQ SEQUENCE 283 AA; 33092 MW; EE49FFB3D450C060 CRC64;
MPSIRATHWC FTLNFSGSIP EINWTADVQY SIWQHERVGH DHLQGYIQMN KHVTLKKMKE
LLPGAHLEMA KAPKKAIEYC QKKESAIAGP WEYGTWISSG SHKRKLMERF EDGPEEMKLE
DPGLYRRCLS RVQMKKIRES CTWNFDLRPW QDELLKTIEQ EPDDRTIIWV YGPHGGEGKS
AFAKYLTLKE GWWYTAGGKA TDMLYSYSLD PTCHVCIDIP RCTREEYINY SVIEQIKNRV
IINTKYEPCT IRDDGHNVHV IVFCNFLPDV TRISEDRIKI INC
