Crystal structure of Rep' of porcine circovirus type 2

Experimental Data Snapshot

  • Resolution: 2.33 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.254 

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Crystal structure of the dimerized of porcine circovirus type II replication-related protein Rep'.

Guan, S.Tian, A.Jing, H.Yuan, H.Jia, H.Shi, Y.Chen, H.Cao, S.Peng, G.Song, Y.

(2023) Proteins 91: 1130-1139

  • DOI: https://doi.org/10.1002/prot.26498
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Porcine circovirus type 2 (PCV2) can cause porcine circovirus-associated disease (PCVAD), which causes significant economic losses to the global pig industry annually. There are no effective antiviral drugs used to control and treat PCV2, and prevention is mainly obtained through vaccination. PCV2 genome replicates through the rolling circle replication (RCR) mechanism involving Rep and Rep', so analyzing the holistic structure of Rep and Rep' will help us better understand the replication process of PCV2. However, there are no reports on the integral structure of Rep' and Rep, which seriously hinders the research of the viral replication. By using the x-ray diffraction method, the structure of the Rep' dimer was resolved by us in this study. Structural analysis revealed that Rep' is a dimer formed by the interaction of the C-terminal domain. The two Rep' form a positively charged groove, which may play an essential role in the viral binding of dsDNA. Together, this study help to understand the replication process of the virus and may also provide new insights into the development of antiviral drugs.

  • Organizational Affiliation

    State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isoform Rep' of Replication-associated protein
A, B
186Porcine circovirus 2Mutation(s): 0 
Gene Names: RepORF1
EC: 2.7.7 (PDB Primary Data), 3.1.21 (PDB Primary Data), 3.6.1 (PDB Primary Data)
Find proteins for Q8BB16 (Porcine circovirus 2)
Explore Q8BB16 
Go to UniProtKB:  Q8BB16
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8BB16
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.33 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.254 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.12α = 90
b = 73.12β = 90
c = 133.85γ = 120
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China31972658

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-24
    Type: Initial release
  • Version 1.1: 2023-07-19
    Changes: Database references
  • Version 1.2: 2023-11-08
    Changes: Data collection, Refinement description