6O59

Crystal structure of the N-terminal domain of the A subunit of the Bacillus megaterium spore germinant receptor GerK3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 

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This is version 1.3 of the entry. See complete history


Literature

Structural and functional analyses of the N-terminal domain of the A subunit of aBacillus megateriumspore germinant receptor.

Li, Y.Jin, K.Perez-Valdespino, A.Federkiewicz, K.Davis, A.Maciejewski, M.W.Setlow, P.Hao, B.

(2019) Proc Natl Acad Sci U S A 116: 11470-11479

  • DOI: 10.1073/pnas.1903675116
  • Primary Citation of Related Structures:  
    6O59

  • PubMed Abstract: 
  • Germination of Bacillus spores is induced by the interaction of specific nutrient molecules with germinant receptors (GRs) localized in the spore's inner membrane. GRs typically consist of three subunits referred to as A, B, and C, although functions of individual subunits are not known ...

    Germination of Bacillus spores is induced by the interaction of specific nutrient molecules with germinant receptors (GRs) localized in the spore's inner membrane. GRs typically consist of three subunits referred to as A, B, and C, although functions of individual subunits are not known. Here we present the crystal structure of the N-terminal domain (NTD) of the A subunit of the Bacillus megaterium GerK 3 GR, revealing two distinct globular subdomains bisected by a cleft, a fold with strong homology to substrate-binding proteins in bacterial ABC transporters. Molecular docking, chemical shift perturbation measurement, and mutagenesis coupled with spore germination analyses support a proposed model that the interface between the two subdomains in the NTD of GR A subunits serves as the germinant binding site and plays a critical role in spore germination. Our findings provide a conceptual framework for understanding the germinant recruitment mechanism by which GRs trigger spore germination.


    Organizational Affiliation

    Department of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, CT 06030 bhao@uchc.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Germination proteinA, B272Priestia megateriumMutation(s): 0 
Gene Names: gerAA
UniProt
Find proteins for O07504 (Bacillus megaterium)
Explore O07504 
Go to UniProtKB:  O07504
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.245α = 90
b = 106.245β = 90
c = 140.188γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
RESOLVEphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-03-01 
  • Released Date: 2019-05-22 
  • Deposition Author(s): Li, Y., Hao, B.

Funding OrganizationLocationGrant Number
Department of Energy (DOE, United States)United StatesW911NF-09-1-0286

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-22
    Type: Initial release
  • Version 1.1: 2019-06-05
    Changes: Data collection, Database references
  • Version 1.2: 2019-06-12
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-04
    Changes: Author supporting evidence