4UYP

High resolution structure of the third cohesin ScaC in complex with the ScaB dockerin with a mutation in the N-terminal helix (IN to SI) from Acetivibrio cellulolyticus displaying a type I interaction.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Cell-surface Attachment of Bacterial Multienzyme Complexes Involves Highly Dynamic Protein-Protein Anchors.

Cameron, K.Najmudin, S.Alves, V.D.Bayer, E.A.Smith, S.P.Bule, P.Waller, H.Ferreira, L.M.Gilbert, H.J.Fontes, C.M.

(2015) J. Biol. Chem. 290: 13578-13590

  • DOI: 10.1074/jbc.M114.633339
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein-protein interactions play a pivotal role in the assembly of the cellulosome, one of nature's most intricate nanomachines dedicated to the depolymerization of complex carbohydrates. The integration of cellulosomal components usually occurs thr ...

    Protein-protein interactions play a pivotal role in the assembly of the cellulosome, one of nature's most intricate nanomachines dedicated to the depolymerization of complex carbohydrates. The integration of cellulosomal components usually occurs through the binding of type I dockerin modules located at the C terminus of the enzymes to cohesin modules located in the primary scaffoldin subunit. Cellulosomes are typically recruited to the cell surface via type II cohesin-dockerin interactions established between primary and cell-surface anchoring scaffoldin subunits. In contrast with type II interactions, type I dockerins usually display a dual binding mode that may allow increased conformational flexibility during cellulosome assembly. Acetivibrio cellulolyticus produces a highly complex cellulosome comprising an unusual adaptor scaffoldin, ScaB, which mediates the interaction between the primary scaffoldin, ScaA, through type II cohesin-dockerin interactions and the anchoring scaffoldin, ScaC, via type I cohesin-dockerin interactions. Here, we report the crystal structure of the type I ScaB dockerin in complex with a type I ScaC cohesin in two distinct orientations. The data show that the ScaB dockerin displays structural symmetry, reflected by the presence of two essentially identical binding surfaces. The complex interface is more extensive than those observed in other type I complexes, which results in an ultra-high affinity interaction (Ka ∼10(12) M). A subset of ScaB dockerin residues was also identified as modulating the specificity of type I cohesin-dockerin interactions in A. cellulolyticus. This report reveals that recruitment of cellulosomes onto the cell surface may involve dockerins presenting a dual binding mode to incorporate additional flexibility into the quaternary structure of highly populated multienzyme complexes.


    Related Citations: 
    • Purification, Crystallization and Preliminary X-Ray Characterization of the Acetivibrio Cellulolyticus Type I Cohesin Scac in Complex with the Scab Dockerin.
      Cameron, K.,Alves, V.D.,Bule, P.,Ferreira, L.M.A.,Fontes, C.M.G.A.,Najmudin, S.
      (2012) Acta Crystallogr.,Sect.F 68: 1030


    Organizational Affiliation

    From the CIISA-Faculdade de Medicina Veterinária, ULisboa, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cellulosomal scaffoldin anchoring protein C
A, C
151Hungateiclostridium cellulolyticumMutation(s): 0 
Gene Names: scaC
Find proteins for Q7WYN2 (Hungateiclostridium cellulolyticum)
Go to UniProtKB:  Q7WYN2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cellulosomal scaffoldin adaptor protein B
B, D
75Hungateiclostridium cellulolyticumMutation(s): 2 
Gene Names: scaB
Find proteins for Q7WYN3 (Hungateiclostridium cellulolyticum)
Go to UniProtKB:  Q7WYN3
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A, B, C
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
B, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A, C, D
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.155 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 107.750α = 90.00
b = 107.750β = 90.00
c = 100.810γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
BALBESphasing
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-04-15
    Type: Initial release
  • Version 1.1: 2015-04-22
    Type: Database references
  • Version 1.2: 2015-06-10
    Type: Database references
  • Version 1.3: 2018-11-07
    Type: Data collection, Database references, Source and taxonomy, Structure summary