2ZZV

Crystal Structure of a Periplasmic Substrate Binding Protein in Complex with Calcium and Lactate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of a periplasmic substrate-binding protein in complex with calcium lactate

Akiyama, N.Takeda, K.Miki, K.

(2009) J.Mol.Biol. 392: 559-565

  • DOI: 10.1016/j.jmb.2009.07.043
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Lactate is utilized in many biological processes, and its transport across biological membranes is mediated with various types of transporters. Here, we report the crystal structures of a lactate-binding protein of a TRAP (tripartite ATP-independent ...

    Lactate is utilized in many biological processes, and its transport across biological membranes is mediated with various types of transporters. Here, we report the crystal structures of a lactate-binding protein of a TRAP (tripartite ATP-independent periplasmic) secondary transporter from Thermus thermophilus HB8. The folding of the protein is typical for a type II periplasmic solute-binding protein and forms a dimer in a back-to-back manner. One molecule of l-lactate is clearly identified in a cleft of the protein as a complex with a calcium ion. Detailed crystallographic and biochemical analyses revealed that the calcium ion can be removed from the protein and replaced with other divalent cations. This characterization of the structure of a protein binding with calcium lactate makes a significant contribution to our understanding of the mechanisms by which calcium and lactate are accommodated in cells.


    Organizational Affiliation

    Department of Chemistry, Kyoto University, Sakyo-ku, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ABC transporter, solute-binding protein
A, B
361Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579)Mutation(s): 0 
Find proteins for Q5SK82 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Go to UniProtKB:  Q5SK82
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LAC
Query on LAC

Download SDF File 
Download CCD File 
A, B
LACTIC ACID
C3 H6 O3
JVTAAEKCZFNVCJ-UWTATZPHSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.165 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 75.052α = 90.00
b = 77.335β = 90.00
c = 136.389γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance