5WUQ

Crystal structure of SigW in complex with its anti-sigma RsiW, a zinc binding form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural insights into the regulation of Bacillus subtilis SigW activity by anti-sigma RsiW

Devkota, S.R.Kwon, E.Ha, S.C.Chang, H.W.Kim, D.Y.

(2017) PLoS ONE 12: e0174284-e0174284

  • DOI: 10.1371/journal.pone.0174284
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacillus subtilis SigW is localized to the cell membrane and is inactivated by the tight interaction with anti-sigma RsiW under normal growth conditions. Whereas SigW is discharged from RsiW binding and thus initiates the transcription of its regulon ...

    Bacillus subtilis SigW is localized to the cell membrane and is inactivated by the tight interaction with anti-sigma RsiW under normal growth conditions. Whereas SigW is discharged from RsiW binding and thus initiates the transcription of its regulon under diverse stress conditions such as antibiotics and alkaline shock. The release and activation of SigW in response to extracytoplasmic signals is induced by the regulated intramembrane proteolysis of RsiW. As a ZAS (Zinc-containing anti-sigma) family protein, RsiW has a CHCC zinc binding motif, which implies that its anti-sigma activity may be regulated by the state of zinc coordination in addition to the proteolytic cleavage of RsiW. To understand the regulation mode of SigW activity by RsiW, we determined the crystal structures of SigW in complex with the cytoplasmic domain of RsiW, and compared the conformation of the CHCC motif in the reduced/zinc binding and the oxidized states. The structures revealed that RsiW inhibits the promoter binding of SigW by interacting with the surface groove of SigW. The interaction between SigW and RsiW is not disrupted by the oxidation of the CHCC motif in RsiW, suggesting that SigW activity might not be regulated by the zinc coordination states of the CHCC motif.


    Organizational Affiliation

    College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk, South Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ECF RNA polymerase sigma factor SigW
A, B
187Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: sigW (ybbL)
Find proteins for Q45585 (Bacillus subtilis (strain 168))
Go to UniProtKB:  Q45585
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Anti-sigma-W factor RsiW
C, D
80Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: rsiW (ybbM)
Find proteins for Q45588 (Bacillus subtilis (strain 168))
Go to UniProtKB:  Q45588
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
C, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 63.462α = 90.00
b = 64.206β = 90.00
c = 138.374γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
PHENIXphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-03-29
    Type: Initial release