1NAT

CRYSTAL STRUCTURE OF SPOOF FROM BACILLUS SUBTILIS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A response regulatory protein with the site of phosphorylation blocked by an arginine interaction: crystal structure of Spo0F from Bacillus subtilis.

Madhusudan, M.Zapf, J.Hoch, J.A.Whiteley, J.M.Xuong, N.H.Varughese, K.I.

(1997) Biochemistry 36: 12739-12745

  • DOI: 10.1021/bi971276v

  • PubMed Abstract: 
  • Spo0F is a secondary messenger in the "two-component" system controlling the sporulation of Bacillus subtilis. Spo0F, like the chemotaxis protein CheY, is a single-domain protein homologous to the N-terminal activator domain of the response regulator ...

    Spo0F is a secondary messenger in the "two-component" system controlling the sporulation of Bacillus subtilis. Spo0F, like the chemotaxis protein CheY, is a single-domain protein homologous to the N-terminal activator domain of the response regulators. We recently reported the crystal structure of a phosphatase-resistant mutant Y13S of Spo0F with Ca2+ bound in the active site. The crystal structure of wild-type Spo0F in the absence of a metal ion is presented here. A comparison of the two structures reveals that the cation induces significant changes in the active site. In the present wild-type structure, the carboxylate of Asp11 points away from the center of the active site, whereas when coordinated to the Ca2+, as in the earlier structure, it points toward the active site. In addition, Asp54, the site of phosphorylation, is blocked by a salt bridge interaction of an Arg side chain from a neighboring molecule. From fluorescence quenching studies with Spo0F Y13W, we found that only the amino acid Arg binds to Spo0F in a saturable manner (Kd = 15 mM). This observation suggests that a small molecule with a shape complementary to the active site and having a guanidinium group might inhibit phosphotransfer between response regulators and their cognate histidine kinases.


    Organizational Affiliation

    Department of Biology, University of California at San Diego, La Jolla, California 92093-0359, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SPORULATION RESPONSE REGULATORY PROTEIN
A
124Bacillus subtilis (strain 168)Gene Names: spo0F
EC: 2.7.-.-
Find proteins for P06628 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P06628
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Work: 0.181 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 58.500α = 90.00
b = 58.500β = 90.00
c = 85.400γ = 90.00
Software Package:
Software NamePurpose
UCSDdata reduction
X-PLORrefinement
X-PLORmodel building
X-PLORphasing
SCAL1data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance