1C8O

2.9 A STRUCTURE OF CLEAVED VIRAL SERPIN CRMA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of viral serpin crmA provides insights into its mechanism of cysteine proteinase inhibition.

Simonovic, M.Gettins, P.G.W.Volz, K.

(2000) Protein Sci. 9: 1423-1427

  • DOI: 10.1110/ps.9.8.1423
  • Primary Citation of Related Structures:  1M93

  • PubMed Abstract: 
  • CrmA is an unusual viral serpin that inhibits both cysteine and serine proteinases involved in the regulation of host inflammatory and apoptosis processes. It differs from other members of the serpin superfamily by having a reactive center loop that ...

    CrmA is an unusual viral serpin that inhibits both cysteine and serine proteinases involved in the regulation of host inflammatory and apoptosis processes. It differs from other members of the serpin superfamily by having a reactive center loop that is one residue shorter, and by its apparent inability to form SDS-stable covalent complexes with cysteine proteinases. To obtain insight into the inhibitory mechanism of crmA, we determined the crystal structure of reactive center loop-cleaved crmA to 2.9 A resolution. The structure, which is the first of a viral serpin, suggests that crmA can inhibit cysteine proteinases by a mechanism analogous to that used by other serpins against serine proteinases. However, one striking difference from other serpins, which may be significant for in vivo function, is an additional highly charged antiparallel strand for b sheet A, whose sequence and length are unique to crmA.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, College of Medicine, University of Illinois at Chicago, 60612-7334, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ICE INHIBITOR
A
300Cowpox virus (strain Brighton Red)Gene Names: CRMA (SPI-2)
Find proteins for P07385 (Cowpox virus (strain Brighton Red))
Go to UniProtKB:  P07385
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ICE INHIBITOR
B
41Cowpox virus (strain Brighton Red)Gene Names: CRMA (SPI-2)
Find proteins for P07385 (Cowpox virus (strain Brighton Red))
Go to UniProtKB:  P07385
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 42.670α = 90.00
b = 93.150β = 90.00
c = 101.630γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-09-06
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance