1GSK

Crystal structure of CotA, an endospore coat protein from Bacillus subtilis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal Structure of a Bacterial Endospore Coat Component: A Laccase with Enhanced Thermostability Properties

Enguita, F.J.Martins, L.O.Henriques, A.O.Carrondo, M.A.

(2003) J Biol Chem 278: 19416

  • DOI: 10.1074/jbc.M301251200
  • Primary Citation of Related Structures:  
    1GSK

  • PubMed Abstract: 
  • Endospores produced by the Gram-positive soil bacterium Bacillus subtilis are shielded by a proteinaceous coat formed by over 30 structural components, which self-assemble into a lamellar inner coat and a thicker striated electrodense outer coat. The 65-kDa CotA protein is an abundant component of the outer coat layer ...

    Endospores produced by the Gram-positive soil bacterium Bacillus subtilis are shielded by a proteinaceous coat formed by over 30 structural components, which self-assemble into a lamellar inner coat and a thicker striated electrodense outer coat. The 65-kDa CotA protein is an abundant component of the outer coat layer. CotA is a highly thermostable laccase, assembly of which into the coat is required for spore resistance against hydrogen peroxide and UV light. Here, we report the structure of CotA at 1.7-A resolution, as determined by x-ray crystallography. This is the first structure of an endospore coat component, and also the first structure of a bacterial laccase. The overall fold of CotA comprises three cupredoxin-like domains and includes one mononuclear and one trinuclear copper center. This arrangement is similar to that of other multicopper oxidases and most similar to that of the copper tolerance protein CueO of Escherichia coli. However, the three cupredoxin domains in CotA are further linked by external interdomain loops, which increase the packing level of the structure. We propose that these interdomain loops contribute to the remarkable thermostability of the enzyme, but our results suggest that additional factors are likely to play a role. Comparisons with the structure of other monomeric multicopper oxidases containing four copper atoms suggest that CotA may accept the largest substrates of any known laccase. Moreover, and unlike other laccases, CotA appears to have a flexible lidlike region close to the substrate-binding site that may mediate substrate accessibility. The implications of these findings for the properties of CotA, its assembly and the properties of the bacterial spore coat structure are discussed.


    Organizational Affiliation

    Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2781-901 Oeiras.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SPORE COAT PROTEIN AA513Bacillus subtilisMutation(s): 0 
UniProt
Find proteins for P07788 (Bacillus subtilis (strain 168))
Explore P07788 
Go to UniProtKB:  P07788
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C2O
Query on C2O

Download Ideal Coordinates CCD File 
G [auth A]CU-O-CU LINKAGE
Cu2 O
BERDEBHAJNAUOM-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
B [auth A], C [auth A], D [auth A], E [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
C1O
Query on C1O

Download Ideal Coordinates CCD File 
H [auth A]CU-O LINKAGE
Cu O
QPLDLSVMHZLSFG-UHFFFAOYSA-N
 Ligand Interaction
CU
Query on CU

Download Ideal Coordinates CCD File 
F [auth A]COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.051α = 90
b = 102.051β = 90
c = 136.393γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-05-21
    Type: Initial release
  • Version 1.1: 2011-10-26
    Changes: Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance