5WUR

Crystal structure of SigW in complex with its anti-sigma RsiW, an oxdized form

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 

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:  
    5WUQ, 5WUR

  • 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 under diverse stress conditions such as antibiotics and alkaline shock ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ECF RNA polymerase sigma factor SigWA, B187Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Gene Names: sigW, ybbL, BSU01730
UniProt
Find proteins for Q45585 (Bacillus subtilis (strain 168))
Explore Q45585 
Go to UniProtKB:  Q45585
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ45585
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Anti-sigma-W factor RsiWC, D80Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Gene Names: rsiW, ybbM, BSU01740
UniProt
Find proteins for Q45588 (Bacillus subtilis (strain 168))
Explore Q45588 
Go to UniProtKB:  Q45588
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ45588
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.075α = 90
b = 63.52β = 90
c = 138.547γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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