8UA2

Crystal Structure of infected cell protein 0 (ICP0) from herpes simplex virus 1 (proteolyzed fragment)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

HSV-1 ICP0 dimer domain adopts a novel beta-barrel fold.

McCloskey, E.Kashipathy, M.Cooper, A.Gao, P.Johnson, D.K.Battaile, K.P.Lovell, S.Davido, D.J.

(2024) Proteins 92: 830-841

  • DOI: https://doi.org/10.1002/prot.26673
  • Primary Citation of Related Structures:  
    8UA2, 8UA5

  • PubMed Abstract: 

    Infected cell protein 0 (ICP0) is an immediate-early regulatory protein of herpes simplex virus 1 (HSV-1) that possesses E3 ubiquitin ligase activity. ICP0 transactivates viral genes, in part, through its C-terminal dimer domain (residues 555-767). Deletion of this dimer domain results in reduced viral gene expression, lytic infection, and reactivation from latency. Since ICP0's dimer domain is associated with its transactivation activity and efficient viral replication, we wanted to determine the structure of this specific domain. The C-terminus of ICP0 was purified from bacteria and analyzed by X-ray crystallography to solve its structure. Each subunit or monomer in the ICP0 dimer is composed of nine β-strands and two α-helices. Interestingly, two adjacent β-strands from one monomer "reach" into the adjacent subunit during dimer formation, generating two β-barrel-like structures. Additionally, crystallographic analyses indicate a tetramer structure is formed from two β-strands of each dimer, creating a "stacking" of the β-barrels. The structural protein database searches indicate the fold or structure adopted by the ICP0 dimer is novel. The dimer is held together by an extensive network of hydrogen bonds. Computational analyses reveal that ICP0 can either form a dimer or bind to SUMO1 via its C-terminal SUMO-interacting motifs but not both. Understanding the structure of the dimer domain will provide insights into the activities of ICP0 and, ultimately, the HSV-1 life cycle.


  • Organizational Affiliation

    Department of Molecular Biosciences, University of Kansas, Lawrence, Kansas, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RL2
A, B
390Human alphaherpesvirus 1Mutation(s): 0 
Gene Names: RL2RL2_1HHV1gp002HHV1gp082
UniProt
Find proteins for H9E965 (Human herpesvirus 1)
Explore H9E965 
Go to UniProtKB:  H9E965
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupH9E965
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.909α = 90
b = 95.909β = 90
c = 74.526γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction
CRANK2phasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP30GM1110761
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP20GM113117

Revision History  (Full details and data files)

  • Version 1.0: 2024-02-28
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Database references