5IHS

Structure of CHU_2103 from Cytophaga hutchinsonii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.132 
  • R-Value Work: 0.117 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Periplasmic Cytophaga hutchinsonii Endoglucanases Are Required for Use of Crystalline Cellulose as the Sole Source of Carbon and Energy.

Zhu, Y.Han, L.Hefferon, K.L.Silvaggi, N.R.Wilson, D.B.McBride, M.J.

(2016) Appl.Environ.Microbiol. 82: 4835-4845

  • DOI: 10.1128/AEM.01298-16

  • PubMed Abstract: 
  • The soil bacterium Cytophaga hutchinsonii actively digests crystalline cellulose by a poorly understood mechanism. Genome analyses identified nine genes predicted to encode endoglucanases with roles in this process. No predicted cellobiohydrolases, w ...

    The soil bacterium Cytophaga hutchinsonii actively digests crystalline cellulose by a poorly understood mechanism. Genome analyses identified nine genes predicted to encode endoglucanases with roles in this process. No predicted cellobiohydrolases, which are usually involved in the utilization of crystalline cellulose, were identified. Chromosomal deletions were performed in eight of the endoglucanase-encoding genes: cel5A, cel5B, cel5C, cel9A, cel9B, cel9C, cel9E, and cel9F Each mutant retained the ability to digest crystalline cellulose, although the deletion of cel9C caused a modest decrease in cellulose utilization. Strains with multiple deletions were constructed to identify the critical cellulases. Cells of a mutant lacking both cel5B and cel9C were completely deficient in growth on cellulose. Cell fractionation and biochemical analyses indicate that Cel5B and Cel9C are periplasmic nonprocessive endoglucanases. The requirement of periplasmic endoglucanases for cellulose utilization suggests that cellodextrins are transported across the outer membrane during this process. Bioinformatic analyses predict that Cel5A, Cel9A, Cel9B, Cel9D, and Cel9E are secreted across the outer membrane by the type IX secretion system, which has been linked to cellulose utilization. These secreted endoglucanases may perform the initial digestion within amorphous regions on the cellulose fibers, releasing oligomers that are transported into the periplasm for further digestion by Cel5B and Cel9C. The results suggest that both cell surface and periplasmic endoglucanases are required for the growth of C. hutchinsonii on cellulose and that novel cell surface proteins may solubilize and transport cellodextrins across the outer membrane.


    Organizational Affiliation

    Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA.,Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA.,Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA mcbride@uwm.edu.,Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endoglucanase, glycoside hydrolase family 5 protein
A
347Cytophaga hutchinsonii (strain ATCC 33406 / NCIMB 9469)Mutation(s): 0 
Gene Names: cel
EC: 3.2.1.4
Find proteins for Q11T98 (Cytophaga hutchinsonii (strain ATCC 33406 / NCIMB 9469))
Go to UniProtKB:  Q11T98
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.132 
  • R-Value Work: 0.117 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 46.510α = 90.00
b = 70.210β = 118.03
c = 46.850γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
BALBESphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (United States)United StatesMCB-1021721
National Science Foundation (United States)United StatesMCB-1516990

Revision History 

  • Version 1.0: 2016-06-22
    Type: Initial release
  • Version 1.1: 2016-07-27
    Type: Database references
  • Version 1.2: 2017-09-20
    Type: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2017-11-01
    Type: Author supporting evidence