2HQN

Structure of a Atypical Orphan Response Regulator Protein Revealed a New Phosphorylation-Independent Regulatory Mechanism


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of an Atypical Orphan Response Regulator Protein Supports a New Phosphorylation-independent Regulatory Mechanism

Hong, E.Lee, H.M.Ko, H.Kim, D.-U.Jeon, B.-Y.Jung, J.Shin, J.Lee, S.-A.Kim, Y.Jeon, Y.H.Cheong, C.Cho, H.-S.Lee, W.

(2007) J.Biol.Chem. 282: 20667-20675

  • DOI: 10.1074/jbc.M609104200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Two-component signal transduction systems, commonly found in prokaryotes, typically regulate cellular functions in response to environmental conditions through a phosphorylation-dependent process. A new type of response regulator, hp1043 (HP-RR) from ...

    Two-component signal transduction systems, commonly found in prokaryotes, typically regulate cellular functions in response to environmental conditions through a phosphorylation-dependent process. A new type of response regulator, hp1043 (HP-RR) from Helicobacter pylori, has been recently identified. HP-RR is essential for cell growth and does not require the well known phosphorelay scheme. Unphosphorylated HP-RR binds specifically to its own promoter (P(1043)) and autoregulates the promoter of the tlpB gene (P(tlpB)). We have determined the structure of HP-RR by NMR and x-ray crystallography, revealing a symmetrical dimer with two functional domains. The molecular topology resembles that of the OmpR/PhoB subfamily, however, the symmetrical dimer is stable even in the unphosphorylated state. The dimer interface, formed by three secondary structure elements (alpha4-beta5-alpha5), resembles that of the active, phosphorylated forms of ArcA and PhoB. Several conserved residues of the HP-RR dimeric interface deviate from the OmpR/PhoB subfamily, although there are similar salt bridges and hydrophobic patches within the interface. Our findings reveal how a new type of response regulator protein could function as a cell growth-associated regulator in the absence of post-translational modification.


    Organizational Affiliation

    Department of Biochemistry and HTSD-NMR & Application NRL, College of Science, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul 120-749, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative TRANSCRIPTIONAL REGULATOR
A
109Helicobacter pylori (strain J99 / ATCC 700824)Mutation(s): 0 
Find proteins for Q9ZM42 (Helicobacter pylori (strain J99 / ATCC 700824))
Go to UniProtKB:  Q9ZM42
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • Olderado: 2HQN Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-07-19 
  • Released Date: 2007-05-08 
  • Deposition Author(s): Hong, E., Lee, W.

Revision History 

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance