2BAS

Crystal Structure of the Bacillus subtilis YkuI Protein, with an EAL Domain.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structures of YkuI and its complex with second messenger cyclic Di-GMP suggest catalytic mechanism of phosphodiester bond cleavage by EAL domains.

Minasov, G.Padavattan, S.Shuvalova, L.Brunzelle, J.S.Miller, D.J.Basle, A.Massa, C.Collart, F.R.Schirmer, T.Anderson, W.F.

(2009) J Biol Chem 284: 13174-13184

  • DOI: 10.1074/jbc.M808221200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Cyclic di-GMP (c-di-GMP) is a ubiquitous bacterial second messenger that is involved in the regulation of cell surface-associated traits and the persistence of infections. Omnipresent GGDEF and EAL domains, which occur in various combinations with re ...

    Cyclic di-GMP (c-di-GMP) is a ubiquitous bacterial second messenger that is involved in the regulation of cell surface-associated traits and the persistence of infections. Omnipresent GGDEF and EAL domains, which occur in various combinations with regulatory domains, catalyze c-di-GMP synthesis and degradation, respectively. The crystal structure of full-length YkuI from Bacillus subtilis, composed of an EAL domain and a C-terminal PAS-like domain, has been determined in its native form and in complex with c-di-GMP and Ca(2+). The EAL domain exhibits a triose-phosphate isomerase-barrel fold with one antiparallel beta-strand. The complex with c-di-GMP-Ca(2+) defines the active site of the putative phosphodiesterase located at the C-terminal end of the beta-barrel. The EAL motif is part of the active site with Glu-33 of the motif being involved in cation coordination. The structure of the complex allows the proposal of a phosphodiesterase mechanism, in which the divalent cation and the general base Glu-209 activate a catalytic water molecule for nucleophilic in-line attack on the phosphorus. The C-terminal domain closely resembles the PAS-fold. Its pocket-like structure could accommodate a yet unknown ligand. YkuI forms a tight dimer via EAL-EAL and trans EAL-PAS-like domain association. The possible regulatory significance of the EAL-EAL interface and a mechanism for signal transduction between sensory and catalytic domains of c-di-GMP-specific phosphodiesterases are discussed.


    Organizational Affiliation

    Department of Molecular Pharmacology and Biological Chemistry and Midwest Center for Structural Genomics, Northwestern Feinberg School of Medicine, Chicago, IL 60611, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
YkuI protein
A, B
431Bacillus subtilisMutation(s): 0 
Gene Names: ykuI
Find proteins for O35014 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O35014
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BME
Query on BME

Download CCD File 
A
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.335α = 90
b = 125.271β = 90
c = 167.962γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MAR345data collection
XDSdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-29
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description