4WXM

FleQ REC domain from Pseudomonas aeruginosa PAO1

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

The REC domain mediated dimerization is critical for FleQ from Pseudomonas aeruginosa to function as a c-di-GMP receptor and flagella gene regulator

Su, T., Liu, S., Wang, K., Chi, K., Zhu, D., Wei, T., Huang, Y., Guo, L., Hu, W., Xu, S., Lin, Z., Gu, L.

(2015) J Struct Biol 192: 1-13

  • DOI: 10.1016/j.jsb.2015.09.002
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • FleQ is an AAA+ ATPase enhancer-binding protein that regulates both flagella and biofilm formation in the opportunistic pathogen Pseudomonas aeruginosa. FleQ belongs to the NtrC subfamily of response regulators, but lacks the corresponding aspartic a ...

    FleQ is an AAA+ ATPase enhancer-binding protein that regulates both flagella and biofilm formation in the opportunistic pathogen Pseudomonas aeruginosa. FleQ belongs to the NtrC subfamily of response regulators, but lacks the corresponding aspartic acid for phosphorylation in the REC domain (FleQ(R), also named FleQ domain). Here, we show that the atypical REC domain of FleQ is essential for the function of FleQ. Crystal structure of FleQ(R) at 2.3Å reveals that the structure of FleQ(R) is significantly different from the REC domain of NtrC1 which regulates gene expression in a phosphorylation dependent manner. FleQ(R) forms a novel active dimer (transverse dimer), and mediates the dimerization of full-length FleQ in an unusual manner. Point mutations that affect the dimerization of FleQ lead to loss of function of the protein. Moreover, a c-di-GMP binding site deviating from the previous reported one is identified through structure analysis and point mutations.

    Organizational Affiliation: 

    State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan 250100, Shandong, China. Electronic address: lcgu@sdu.edu.cn.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transcriptional regulator FleQ
A, B, C, D, E
143Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: fleQ, PA1097
Find proteins for G3XCV0 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  G3XCV0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.214 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 144.397α = 90
b = 58.451β = 118.35
c = 92.213γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALEPACKdata reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History & Funding Information

Deposition Data

  • Deposited Date: 2014-11-14 
  • Released Date: 2015-09-23 
    • Deposition Author(s): Su, T., Liu, S., Gu, L.
Funding OrganizationLocationGrant Number
China--

Revision History 

  • Version 1.0: 2015-09-23
    Type: Initial release
  • Version 1.1: 2015-10-21
    Changes: Database references