4ZHY

Crystal structure of a bacterial signalling complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report



Literature

Structural insights into YfiR sequestering by YfiB in Pseudomonas aeruginosa PAO1

Li, S.Li, T.Xu, Y.Zhang, Q.Zhang, W.Che, S.Liu, R.Wang, Y.Bartlam, M.

(2015) Sci Rep 5: 16915-16915

  • DOI: 10.1038/srep16915
  • Primary Citation of Related Structures:  
    4ZHU, 4ZHV, 4ZHW, 4ZHY

  • PubMed Abstract: 
  • YfiBNR is a tripartite signalling system in Pseudomonas aeruginosa that modulates intracellular c-di-GMP levels in response to signals received in the periplasm. YfiB is an outer membrane lipoprotein and presumed sensor protein that sequesters the re ...

    YfiBNR is a tripartite signalling system in Pseudomonas aeruginosa that modulates intracellular c-di-GMP levels in response to signals received in the periplasm. YfiB is an outer membrane lipoprotein and presumed sensor protein that sequesters the repressor protein YfiR. To provide insights into YfiBNR function, we have determined three-dimensional crystal structures of YfiB and YfiR from P. aeruginosa PAO1 alone and as a 1:1 complex. A YfiB(27-168) construct is predominantly dimeric, whereas a YfiB(59-168) is monomeric, indicating that YfiB can dimerize via its N-terminal region. YfiR forms a stable complex with YfiB(59-168), while the YfiR binding interface is obstructed by the N-terminal region in YfiB(27-168). The YfiB-YfiR complex reveals a conserved interaction surface on YfiR that overlaps with residues predicted to interact with the periplasmic PAS domain of YfiN. Comparison of native and YfiR-bound structures of YfiB suggests unwinding of the N-terminal linker region for attachment to the outer membrane. A model is thus proposed for YfiR sequestration at the outer membrane by YfiB. Our work provides the first detailed insights into the interaction between YfiB and YfiR at the molecular level and is a valuable starting point for further functional and mechanistic studies of the YfiBNR signalling system.


    Organizational Affiliation

    College of Life Sciences, Nankai University, Tianjin, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
YfiRA190Pseudomonas aeruginosa PAO1Mutation(s): 1 
Gene Names: yfiRPA1121
Find proteins for Q9I4L4 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I4L4 
Go to UniProtKB:  Q9I4L4
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
YfiBB168Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: yfiBPA1119
Find proteins for Q9I4L6 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I4L6 
Go to UniProtKB:  Q9I4L6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.539α = 90
b = 160.989β = 90
c = 43.636γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-04-27
    Type: Initial release