2LTJ

Conformational analysis of StrH, the surface-attached exo- beta-D-N-acetylglucosaminidase from Streptococcus pneumoniae


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conformational analysis of StrH, the surface-attached exo-beta-D-N-acetylglucosaminidase from Streptococcus pneumoniae.

Pluvinage, B.Chitayat, S.Ficko-Blean, E.Abbott, D.W.Kunjachen, J.M.Grondin, J.Spencer, H.L.Smith, S.P.Boraston, A.B.

(2013) J.Mol.Biol. 425: 334-349

  • DOI: 10.1016/j.jmb.2012.11.005

  • PubMed Abstract: 
  • Streptococcus pneumoniae is a serious human pathogen that presents on its surface numerous proteins involved in the host-bacterium interaction. The carbohydrate-active enzymes are particularly well represented among these surface proteins, and many o ...

    Streptococcus pneumoniae is a serious human pathogen that presents on its surface numerous proteins involved in the host-bacterium interaction. The carbohydrate-active enzymes are particularly well represented among these surface proteins, and many of these are known virulence factors, highlighting the importance of carbohydrate processing by this pathogen. StrH is a surface-attached exo-β-D-N-acetylglucosaminidase that cooperates with the sialidase NanA and the β-galactosidase BgaA to sequentially degrade the nonreducing terminal arms of complex N-linked glycans. This enzyme is a large multi-modular protein that is notable for its tandem N-terminal family GH20 catalytic modules, whose individual X-ray crystal structures were recently reported. StrH also contains C-terminal tandem G5 modules, which are uncharacterized. Here, we report the NMR-determined solution structure of the first G5 module in the tandem, G5-1, which along with the X-ray crystal structures of the GH20 modules was used in conjunction with small-angle X-ray scattering to construct a pseudo-atomic model of full-length StrH. The results reveal a model in which StrH adopts an elongated conformation that may project the catalytic modules away from the surface of the bacterium to a distance of up to ~250 Å.


    Organizational Affiliation

    Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada V8W 3P6.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-N-acetylhexosaminidase
A
112Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)Gene Names: strH
EC: 3.2.1.52
Find proteins for P49610 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Go to UniProtKB:  P49610
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2LTJ Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-28
    Type: Initial release
  • Version 1.1: 2013-06-19
    Type: Database references