3LSP

Crystal Structure of DesT bound to desCB promoter and oleoyl-CoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for the transcriptional regulation of membrane lipid homeostasis.

Miller, D.J.Zhang, Y.M.Subramanian, C.Rock, C.O.White, S.W.

(2010) Nat.Struct.Mol.Biol. 17: 971-975

  • DOI: 10.1038/nsmb.1847
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • DesT is a transcriptional repressor that regulates the genes that control the unsaturated:saturated fatty acid ratio available for membrane lipid synthesis. DesT bound to unsaturated acyl-CoA has a high affinity for its cognate palindromic DNA-bindin ...

    DesT is a transcriptional repressor that regulates the genes that control the unsaturated:saturated fatty acid ratio available for membrane lipid synthesis. DesT bound to unsaturated acyl-CoA has a high affinity for its cognate palindromic DNA-binding site, whereas DesT bound to saturated acyl-CoA does not bind this site. Structural analyses of the DesT-oleoyl-CoA-DNA and DesT-palmitoyl-CoA complexes reveal that acyl chain shape directly influences the packing of hydrophobic core residues within the DesT ligand-binding domain. These changes are propagated to the paired DNA-binding domains via conformational changes to modulate DNA binding. These structural interpretations are supported by the in vitro and in vivo characterization of site-directed mutants. The regulation of DesT by the unsaturated:saturated ratio of acyl chains rather than the concentration of a single ligand is a paradigm for understanding transcriptional regulation of membrane lipid homeostasis.


    Organizational Affiliation

    Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DesT
A
220Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 1 
Gene Names: desT
Find proteins for Q9HUS3 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9HUS3
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*TP*AP*CP*AP*TP*CP*AP*GP*TP*GP*AP*AP*CP*GP*CP*TP*TP*GP*TP*TP*GP*AP*CP*TP*CP*GP*AP*TP*TP*G)-3')B31N/A
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*CP*AP*AP*TP*CP*GP*AP*GP*TP*CP*AP*AP*CP*AP*AP*GP*CP*GP*TP*TP*CP*AP*CP*TP*GP*AP*TP*GP*TP*A)-3')D31N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
OLA
Query on OLA

Download SDF File 
Download CCD File 
A
OLEIC ACID
C18 H34 O2
ZQPPMHVWECSIRJ-KTKRTIGZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.223 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 78.385α = 90.00
b = 78.385β = 90.00
c = 147.988γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-08-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance