5K39

THE TYPE II COHESIN DOCKERIN COMPLEX FROM CLOSTRIDIUM THERMOCELLUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Diverse specificity of cellulosome attachment to the bacterial cell surface.

Bras, J.L.Pinheiro, B.A.Cameron, K.Cuskin, F.Viegas, A.Najmudin, S.Bule, P.Pires, V.M.Romao, M.J.Bayer, E.A.Spencer, H.L.Smith, S.Gilbert, H.J.Alves, V.D.Carvalho, A.L.Fontes, C.M.

(2016) Sci Rep 6: 38292-38292

  • DOI: 10.1038/srep38292
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • During the course of evolution, the cellulosome, one of Nature's most intricate multi-enzyme complexes, has been continuously fine-tuned to efficiently deconstruct recalcitrant carbohydrates. To facilitate the uptake of released sugars, anaerobic bac ...

    During the course of evolution, the cellulosome, one of Nature's most intricate multi-enzyme complexes, has been continuously fine-tuned to efficiently deconstruct recalcitrant carbohydrates. To facilitate the uptake of released sugars, anaerobic bacteria use highly ordered protein-protein interactions to recruit these nanomachines to the cell surface. Dockerin modules located within a non-catalytic macromolecular scaffold, whose primary role is to assemble cellulosomal enzymatic subunits, bind cohesin modules of cell envelope proteins, thereby anchoring the cellulosome onto the bacterial cell. Here we have elucidated the unique molecular mechanisms used by anaerobic bacteria for cellulosome cellular attachment. The structure and biochemical analysis of five cohesin-dockerin complexes revealed that cell surface dockerins contain two cohesin-binding interfaces, which can present different or identical specificities. In contrast to the current static model, we propose that dockerins utilize multivalent modes of cohesin recognition to recruit cellulosomes to the cell surface, a mechanism that maximises substrate access while facilitating complex assembly.


    Organizational Affiliation

    Centro Interdisciplinar de Investigação em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, Portugal.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cellulosome anchoring protein cohesin region
A
171Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)Mutation(s): 0 
Find proteins for Q06853 (Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372))
Go to UniProtKB:  Q06853
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Dockerin module from a protein of unknown function
B
164Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)Mutation(s): 0 
Find proteins for A3DGE8 (Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372))
Go to UniProtKB:  A3DGE8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.187 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 116.670α = 90.00
b = 78.630β = 95.87
c = 35.800γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-03-29
    Type: Initial release