Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 5.45 kDa 
• Atom Count: 381 
• Modelled Residue Count: 46 
• Deposited Residue Count: 46 
• Unique protein chains: 1

1PV0

Structure of the Sda antikinase

• PDB DOI: 10.2210/pdb1PV0/pdb
• BMRB: 5847

• Classification: SIGNALING PROTEIN
• Organism(s): Bacillus subtilis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-06-26 Released: 2004-04-13 
• Deposition Author(s): Rowland, S.L., Burkholder, W.F., Maciejewski, M.W., Grossman, A.D., King, G.F.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 25 
• Selection Criteria: Structures with lowest energy and least restraint violations 

Literature

Structure and mechanism of Sda: an inhibitor of the histidine kinases that regulate initiation of sporulation in Bacillus subtilis

Rowland, S.L., Burkholder, W.F., Cunningham, K.A., Maciejewski, M.W., Grossman, A.D., King, G.F.

(2004) Mol Cell 13: 689-701

• PubMed: 15023339 
• DOI: 10.1016/s1097-2765(04)00084-x
• Primary Citation of Related Structures:  
  1PV0


• PubMed Abstract: 
  

Histidine kinases are used extensively in prokaryotes to monitor and respond to changes in cellular and environmental conditions. In Bacillus subtilis, sporulation-specific gene expression is controlled by a histidine kinase phosphorelay that culminates in phosphorylation of the Spo0A transcription factor. Sda provides a developmental checkpoint by inhibiting this phosphorelay in response to DNA damage and replication defects. We show that Sda acts at the first step in the relay by inhibiting autophosphorylation of the histidine kinase KinA. The structure of Sda, which we determined using NMR, comprises a helical hairpin. A cluster of conserved residues on one face of the hairpin mediates an interaction between Sda and the KinA dimerization/phosphotransfer domain. This interaction stabilizes the KinA dimer, and the two proteins form a stable heterotetramer. The data indicate that Sda forms a molecular barricade that inhibits productive interaction between the catalytic and phosphotransfer domains of KinA.

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Related Citations: 

• Replication initiation proteins regulate a developmental checkpoint in Bacillus subtilis
  Burkholder, W.F., Kurster, I., Grossman, A.D.
  (2001) Cell 104: 269

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Organizational Affiliation: 

Department of Molecular, Microbial and Structural Biology, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT 06030 USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sda	A	46	Bacillus subtilis	Mutation(s): 0  Gene Names: sda
UniProt
Find proteins for Q7WY62 (Bacillus subtilis (strain 168)) Explore Q7WY62  Go to UniProtKB:  Q7WY62

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 25 
• Selection Criteria: Structures with lowest energy and least restraint violations 
• OLDERADO: 1PV0 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-26 
• Released Date: 2004-04-13 
Deposition Author(s): Rowland, S.L., Burkholder, W.F., Maciejewski, M.W., Grossman, A.D., King, G.F.

Revision History  

• Version 1.0: 2004-04-13
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Database references, Derived calculations