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Q91EK3

- REP_GOCV

UniProt

Q91EK3 - REP_GOCV

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Protein
Replication-associated protein
Gene
rep
Organism
Goose circovirus (GoCV)
Status
Reviewed - Annotation score: 4 out of 5 - Protein inferred from homologyi

Functioni

Essential for the replication of viral ssDNA. The closed circular ssDNA genome is first converted to a superhelical dsDNA. Rep and/or Rep' binds a specific hairpin at the genome origin of replication. Introduces an endonucleolytic nick within the conserved sequence 5'-AGTATTAC-3' in the intergenic region of the genome, thereby initiating the rolling circle replication (RCR). Following cleavage, binds covalently to the 5'-phosphate of DNA as a tyrosyl ester. The cleavage gives rise to a free 3'-OH that serves as a primer for the cellular DNA polymerase. The polymerase synthesizes the (+) strand DNA by rolling circle mechanism. After one round of replication, a Rep-catalyzed nucleotidyl transfer reaction releases a circular single-stranded virus genome, thereby terminating the replication. Displays origin-specific DNA cleavage, nucleotidyl transferase, ATPase and helicase activities. ATPase activity is probably carried by the isoform Rep By similarity.

Catalytic activityi

ATP + H2O = ADP + phosphate.

Cofactori

Divalent metal cations, possibly magnesium or manganese Inferred.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi44 – 441Divalent metal cation Reviewed prediction
Metal bindingi53 – 531Divalent metal cation Reviewed prediction
Active sitei92 – 921For DNA cleavage activity By similarity
Metal bindingi96 – 961Divalent metal cation Reviewed prediction

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Nucleotide bindingi168 – 1758ATP By similarity

GO - Molecular functioni

  1. ATP binding Source: UniProtKB-KW
  2. ATPase activity, uncoupled Source: InterPro
  3. DNA binding Source: UniProtKB-KW
  4. RNA binding Source: InterPro
  5. RNA helicase activity Source: InterPro
  6. endodeoxyribonuclease activity, producing 5'-phosphomonoesters Source: InterPro
  7. metal ion binding Source: UniProtKB-KW
  8. nucleotidyltransferase activity Source: UniProtKB-KW

GO - Biological processi

  1. DNA replication Source: UniProtKB-KW
  2. protein-DNA covalent cross-linking Source: InterPro
Complete GO annotation...

Keywords - Molecular functioni

Endonuclease, Helicase, Hydrolase, Nuclease, Nucleotidyltransferase, Transferase

Keywords - Biological processi

DNA replication

Keywords - Ligandi

ATP-binding, DNA-binding, Metal-binding, Nucleotide-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Replication-associated protein (EC:2.7.7.-, EC:3.1.21.-, EC:3.6.1.3)
Alternative name(s):
ATP-dependent helicase Rep
RepP
Gene namesi
Name:rep
OrganismiGoose circovirus (GoCV)
Taxonomic identifieri146032 [NCBI]
Taxonomic lineageiVirusesssDNA virusesCircoviridaeCircovirus
Virus hostiAnser (geese) [TaxID: 8842]
ProteomesiUP000008626: Genome

Subcellular locationi

Host nucleus Reviewed prediction

GO - Cellular componenti

  1. host cell nucleus Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

Host nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 293293Replication-associated protein
PRO_0000319864Add
BLAST

Keywords - PTMi

Covalent protein-DNA linkage

Interactioni

Subunit structurei

Interacts with the capsid protein; this interaction relocates Rep into the nucleus By similarity.

Structurei

3D structure databases

ProteinModelPortaliQ91EK3.

Family & Domainsi

Motif

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Motifi3 – 1311Nuclear localization signal Reviewed prediction
Add
BLAST
Motifi14 – 174RCR-1 By similarity
Motifi53 – 586RCR-2 By similarity
Motifi62 – 8322Nuclear localization signal Reviewed prediction
Add
BLAST
Motifi92 – 954RCR-3 By similarity

Domaini

There are 3 rolling circle replication (RCR) motifs. RCR-2 is probably involved in metal coordination. RCR-3 is required for phosphodiester bond cleavage for initiation of RCR.

Sequence similaritiesi

Family and domain databases

InterProiIPR000605. Helicase_SF3_ssDNA/RNA_vir.
IPR027417. P-loop_NTPase.
IPR003365. Viral_rep_N.
[Graphical view]
PfamiPF00910. RNA_helicase. 1 hit.
PF02407. Viral_Rep. 1 hit.
[Graphical view]
SUPFAMiSSF52540. SSF52540. 1 hit.

Sequencei

Sequence statusi: Complete.

Q91EK3-1 [UniParc]FASTAAdd to Basket

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MAKNGNYSYK RWVFTINNPT FEDYCAVVEF CNLDNCKFAI VGEEKGEKEG    50
TPHLQGFLSL RKNAKAAALE ENLGGRAWLS RARGSDEDNE EYCSKESTYL 100
RVGEPNRKGR SSDLPDAASD VLAGLPITDV ARKYPTTYVM FGRGLERLRQ 150
LIVETARDWK TEVIVLIGRP GSGKSRYAFE FPAREKYYKS RGKWWDGYNG 200
QDVVVMDDFY GWLPYDDLLR ICDRYPLRVE YKGGMTQFVA KTLIITSNRE 250
PRDWYKCEFD VSALYRRINQ YLILTPDGYA PAPEFMLPFK INY 293
Length:293
Mass (Da):33,842
Last modified:December 1, 2001 - v1
Checksum:iC626E2533B0D46D2
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AJ304456 Genomic DNA. Translation: CAC50261.1.
RefSeqiNP_150368.1. NC_003054.1.

Genome annotation databases

GeneIDi921700.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AJ304456 Genomic DNA. Translation: CAC50261.1 .
RefSeqi NP_150368.1. NC_003054.1.

3D structure databases

ProteinModelPortali Q91EK3.
ModBasei Search...
MobiDBi Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 921700.

Family and domain databases

InterProi IPR000605. Helicase_SF3_ssDNA/RNA_vir.
IPR027417. P-loop_NTPase.
IPR003365. Viral_rep_N.
[Graphical view ]
Pfami PF00910. RNA_helicase. 1 hit.
PF02407. Viral_Rep. 1 hit.
[Graphical view ]
SUPFAMi SSF52540. SSF52540. 1 hit.
ProtoNeti Search...

Publicationsi

  1. "Genome sequence determinations and analyses of novel circoviruses from goose and pigeon."
    Todd D., Weston J.H., Soike D., Smyth J.A.
    Virology 286:354-362(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].

Entry informationi

Entry nameiREP_GOCV
AccessioniPrimary (citable) accession number: Q91EK3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 26, 2008
Last sequence update: December 1, 2001
Last modified: April 16, 2014
This is version 47 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Multifunctional enzyme

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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