5AVF

The ligand binding domain of Mlp37 with taurine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Identification of a Vibrio cholerae chemoreceptor that senses taurine and amino acids as attractants

Nishiyama, S.Takahashi, Y.Yamamoto, K.Suzuki, D.Itoh, Y.Sumita, K.Uchida, Y.Homma, M.Imada, K.Kawagishi, I.

(2016) Sci Rep 6: 20866-20866

  • DOI: 10.1038/srep20866
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Vibrio cholerae, the etiological agent of cholera, was found to be attracted by taurine (2-aminoethanesulfonic acid), a major constituent of human bile. Mlp37, the closest homolog of the previously identified amino acid chemoreceptor Mlp24, was found ...

    Vibrio cholerae, the etiological agent of cholera, was found to be attracted by taurine (2-aminoethanesulfonic acid), a major constituent of human bile. Mlp37, the closest homolog of the previously identified amino acid chemoreceptor Mlp24, was found to mediate taxis to taurine as well as L-serine, L-alanine, L-arginine, and other amino acids. Methylation of Mlp37 was enhanced upon the addition of taurine and amino acids. Isothermal titration calorimetry demonstrated that a purified periplasmic fragment of Mlp37 binds directly to taurine, L-serine, L-alanine and L-arginine. Crystal structures of the periplamic domain of Mlp37 revealed that L-serine and taurine bind to the membrane-distal PAS domain in essentially in the same way. The structural information was supported by characterising the in vivo properties of alanine-substituted mutant forms of Mlp37. The fact that the ligand-binding domain of the L-serine complex had a small opening, which would accommodate a larger R group, accounts for the broad ligand specificity of Mlp37 and allowed us to visualise ligand binding to Mlp37 with fluorescently labelled L-serine. Taken together, we conclude that Mlp37 serves as the major chemoreceptor for taurine and various amino acids.


    Organizational Affiliation

    Department of Frontier Bioscience, Hosei University, Kajino-cho, Koganei, Tokyo 184-8584, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Methyl-accepting chemotaxis (MCP) signaling domain protein
A, B
257Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Mutation(s): 0 
Find proteins for Q9KL26 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  Q9KL26
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TAU
Query on TAU

Download SDF File 
Download CCD File 
A, B
2-AMINOETHANESULFONIC ACID
C2 H7 N O3 S
XOAAWQZATWQOTB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.193 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 33.230α = 90.00
b = 119.050β = 90.00
c = 138.750γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-01
    Type: Initial release