2IU5

Dihydroxyacetone kinase operon activator DhaS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Regulation of the Dha Operon of Lactococcus Lactis: A Deviation from the Rule Followed by the Tetr Family of Transcription Regulators

Christen, S.Srinivas, A.Bahler, P.Zeller, A.Pridmore, D.Bieniossek, C.Baumann, U.Erni, B.

(2006) J.Biol.Chem. 281: 23129

  • DOI: 10.1074/jbc.M603486200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Dihydroxyacetone (Dha) kinases are a novel family of kinases with signaling and metabolic functions. Here we report the x-ray structures of the transcriptional activator DhaS and the coactivator DhaQ and characterize their function. DhaQ is a paralog ...

    Dihydroxyacetone (Dha) kinases are a novel family of kinases with signaling and metabolic functions. Here we report the x-ray structures of the transcriptional activator DhaS and the coactivator DhaQ and characterize their function. DhaQ is a paralog of the Dha binding Dha kinase subunit; DhaS belongs to the family of TetR repressors although, unlike all known members of this family, it is a transcriptional activator. DhaQ and DhaS form a stable complex that in the presence of Dha activates transcription of the Lactococcus lactis dha operon. Dha covalently binds to DhaQ through a hemiaminal bond with a histidine and thereby induces a conformational change, which is propagated to the surface via a cantilever-like structure. DhaS binding protects an inverted repeat whose sequence is GGACACATN6ATTTGTCC and renders two GC base pairs of the operator DNA hypersensitive to DNase I cleavage. The proximal half-site of the inverted repeat partially overlaps with the predicted -35 consensus sequence of the dha promoter.


    Organizational Affiliation

    Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HTH-TYPE DHAKLM OPERON TRANSCRIPTIONAL ACTIVATOR DHAS
A, B
195Lactococcus lactis subsp. lactis (strain IL1403)Mutation(s): 1 
Gene Names: dhaS (dhaR)
Find proteins for Q9CIV9 (Lactococcus lactis subsp. lactis (strain IL1403))
Go to UniProtKB:  Q9CIV9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.459α = 90.00
b = 46.284β = 90.00
c = 171.939γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance