1M93

1.65 A Structure of Cleaved Viral Serpin CRMA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.188 

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:  

  • 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.


    Related Citations: 
    • Crystallization and preliminary X-ray diffraction analysis of a recombinant cysteine-free mutant of crmA
      Simonovic, M.,Gettins, P.G.W.,Volz, K.
      (2000) Acta Crystallogr.,Sect.D 56: 1440


    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
Serine proteinase inhibitor 2
A
55Cowpox virus (strain Brighton Red)Mutation(s): 0 
Gene Names: CRMA (SPI-2)
Find proteins for P07385 (Cowpox virus (strain Brighton Red))
Go to UniProtKB:  P07385
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Serine proteinase inhibitor 2
B
245Cowpox virus (strain Brighton Red)Mutation(s): 6 
Gene Names: CRMA (SPI-2)
Find proteins for P07385 (Cowpox virus (strain Brighton Red))
Go to UniProtKB:  P07385
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Serine proteinase inhibitor 2
C
41Cowpox virus (strain Brighton Red)Mutation(s): 3 
Gene Names: CRMA (SPI-2)
Find proteins for P07385 (Cowpox virus (strain Brighton Red))
Go to UniProtKB:  P07385
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.520α = 90.00
b = 92.590β = 90.00
c = 100.630γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
CNSphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-08-05
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance