4E2C

Crystal Structure of the periplasmic domain of the chimeric LPS O-antigen chain length regulator protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.235 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Characterization of Closely Related O-antigen Lipopolysaccharide (LPS) Chain Length Regulators.

Kalynych, S.Yao, D.Magee, J.Cygler, M.

(2012) J Biol Chem 287: 15696-15705

  • DOI: 10.1074/jbc.M112.354837
  • Primary Citation of Related Structures:  
    4E29, 4E2C, 4E2H, 4E2L

  • PubMed Abstract: 
  • The surface O-antigen polymers of gram-negative bacteria exhibit a modal length distribution that depends on dedicated chain length regulator periplasmic proteins (polysaccharide co-polymerases, PCPs) anchored in the inner membrane by two transmembrane helices ...

    The surface O-antigen polymers of gram-negative bacteria exhibit a modal length distribution that depends on dedicated chain length regulator periplasmic proteins (polysaccharide co-polymerases, PCPs) anchored in the inner membrane by two transmembrane helices. In an attempt to determine whether structural changes underlie the O-antigen modal length specification, we have determined the crystal structures of several closely related PCPs, namely two chimeric PCP-1 family members solved at 1.6 and 2.8 Å and a wild-type PCP-1 from Shigella flexneri solved at 2.8 Å. The chimeric proteins form circular octamers, whereas the wild-type WzzB from S. flexneri was found to be an open trimer. We also present the structure of a Wzz(FepE) mutant, which exhibits severe attenuation in its ability to produce very long O-antigen polymers. Our findings suggest that the differences in the modal length distribution depend primarily on the surface-exposed amino acids in specific regions rather than on the differences in the oligomeric state of the PCP protomers.


    Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, Quebec H3G 0B1, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
chimeric WzzB Chain length determinant proteinA, B245Shigella flexneriSalmonella enterica subsp. enterica serovar Typhimurium str. LT2
This entity is chimeric
Mutation(s): 0 
Gene Names: cldrolS2210SF2089wzzBSTM2079
UniProt
Find proteins for P37792 (Shigella flexneri)
Explore P37792 
Go to UniProtKB:  P37792
Find proteins for Q04866 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore Q04866 
Go to UniProtKB:  Q04866
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP37792Q04866
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.235 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.946α = 90
b = 116.946β = 90
c = 219.126γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-28
    Type: Initial release
  • Version 1.1: 2012-04-04
    Changes: Database references
  • Version 1.2: 2012-06-20
    Changes: Database references
  • Version 1.3: 2017-07-05
    Changes: Source and taxonomy