2SNV

THE REFINED STRUCTURE OF SINDBIS VIRUS CORE PROTEIN IN COMPARISON WITH OTHER CHYMOTRYPSIN-LIKE SERINE PROTEINASE STRUCTURES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Refined structure of Sindbis virus core protein and comparison with other chymotrypsin-like serine proteinase structures.

Tong, L.Wengler, G.Rossmann, M.G.

(1993) J Mol Biol 230: 228-247

  • DOI: 10.1006/jmbi.1993.1139
  • Primary Citation of Related Structures:  
    2SNV

  • PubMed Abstract: 
  • Crystal forms 2 and 3 of Sindbis virus core protein have been refined to 2.8 A and 3.0 A resolution, respectively. The three independent molecular copies in the two crystal forms are essentially identical, except for regions where the molecules are involved in different crystal packing interactions ...

    Crystal forms 2 and 3 of Sindbis virus core protein have been refined to 2.8 A and 3.0 A resolution, respectively. The three independent molecular copies in the two crystal forms are essentially identical, except for regions where the molecules are involved in different crystal packing interactions. The overall polypeptide backbone fold of Sindbis virus core protein is similar to other chymotrypsin-like serine proteinase structures despite a lack of significant sequence homology. Detailed analysis revealed differences in the catalytic triad and the substrate binding pockets between the Sindbis virus core protein and the other serine proteinases. The catalytic aspartic acid residue (Asp163) and residue Asp214 (corresponding to Asp194 in chymotrypsin) are partially exposed to solvent in Sindbis virus core protein. Chymotrypsin Ser214, hydrogen bonded to the catalytic aspartic acid residue in all other serine proteinase structures, is changed to Leu231 in Sindbis virus core protein. Deletions in the loop regions on the surface of the protein account for the smaller size of the ordered part of Sindbis virus core protein (151 residues) as compared to chymotrypsin (236 residues), and permits the cis autocatalytic cleavage of the polyprotein to produce the viral capsid protein.


    Related Citations: 
    • The Structure Determination of Sindbis Virus Core Protein Using Isomorphous Replacement and Molecular Replacement Averaging between Two Crystal Forms
      Tong, L., Choi, H.-K., Minor, W., Rossmann, M.G.
      (1992) Acta Crystallogr A 48: 430
    • Structure of Sindbis Virus Core Protein Reveals a Chymotrypsin-Like Serine Proteinase and the Organization of the Virion
      Choi, H.-K., Tong, L., Minor, W., Dumas, P., Boege, U., Rossmann, M.G., Wengler, G.
      (1991) Nature 354: 37

    Organizational Affiliation

    Department of Biological Sciences, Purdue University West Lafayette, IN 47907.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SINDBIS VIRUS COAT PROTEIN A151Sindbis virusMutation(s): 0 
EC: 3.4.21.90
Find proteins for P03316 (Sindbis virus)
Explore P03316 
Go to UniProtKB:  P03316
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57α = 90
b = 57β = 90
c = 109.8γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance