4O8W

Crystal Structure of the GerD spore germination protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.293 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and Functional Analysis of the GerD Spore Germination Protein of Bacillus Species.

Li, Y.Jin, K.Ghosh, S.Devarakonda, P.Carlson, K.Davis, A.Stewart, K.A.Cammett, E.Rossi, P.P.Setlow, B.Lu, M.Setlow, P.Hao, B.

(2014) J.Mol.Biol. 426: 1995-2008

  • DOI: 10.1016/j.jmb.2014.02.004

  • PubMed Abstract: 
  • Spore germination in Bacillus species represents an excellent model system with which to study the molecular mechanisms underlying the nutritional control of growth and development. Binding of specific chemical nutrients to their cognate receptors lo ...

    Spore germination in Bacillus species represents an excellent model system with which to study the molecular mechanisms underlying the nutritional control of growth and development. Binding of specific chemical nutrients to their cognate receptors located in the spore inner membrane triggers the germination process that leads to a resumption of metabolism in spore outgrowth. Recent studies suggest that the inner membrane GerD lipoprotein plays a critical role in the receptor-mediated activation of downstream germination events. The 121-residue core polypeptide of GerD (GerD⁶⁰⁻¹⁸⁰) from Geobacillus stearothermophilus forms a stable α-helical trimer in aqueous solution. The 2.3-Å-resolution crystal structure of the trimer reveals a neatly twisted superhelical rope, with unusual supercoiling induced by parallel triple-helix interactions. The overall geometry comprises three interleaved hydrophobic screws of interacting helices linked by short turns that have not been seen before. Using complementation analysis in a series of Bacillus subtilis gerD mutants, we demonstrated that alterations in the GerD trimer structure have profound effects on nutrient germination. This important structure-function relationship of trimeric GerD is supported by our identification of a dominant negative gerD mutation in B. subtilis. These results and those of others lead us to propose that GerD mediates clustering of germination proteins in the inner membrane of dormant spores and thus promotes the rapid and cooperative germination response to nutrients.


    Organizational Affiliation

    Department of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, CT 06030-3305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spore germination protein
A, B, C, D, E, F
125Geobacillus kaustophilus (strain HTA426)N/A
Find proteins for Q5L3Q1 (Geobacillus kaustophilus (strain HTA426))
Go to UniProtKB:  Q5L3Q1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.293 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 59.748α = 90.00
b = 98.450β = 90.00
c = 127.485γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
SOLVEphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-03-19
    Type: Initial release
  • Version 1.1: 2014-04-23
    Type: Database references