2G9B

NMR solution structure of CA2+-loaded calbindin D28K


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 900 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest restraint energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure, binding interface and hydrophobic transitions of Ca(2+)-loaded calbindin-D(28K).

Kojetin, D.J.Venters, R.A.Kordys, D.R.Thompson, R.J.Kumar, R.Cavanagh, J.

(2006) Nat.Struct.Mol.Biol. 13: 641-647

  • DOI: 10.1038/nsmb1112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Calbindin-D(28K) is a Ca2+-binding protein, performing roles as both a calcium buffer and calcium sensor. The NMR solution structure of Ca2+-loaded calbindin-D(28K) reveals a single, globular fold consisting of six distinct EF-hand subdomains, which ...

    Calbindin-D(28K) is a Ca2+-binding protein, performing roles as both a calcium buffer and calcium sensor. The NMR solution structure of Ca2+-loaded calbindin-D(28K) reveals a single, globular fold consisting of six distinct EF-hand subdomains, which coordinate Ca2+ in loops on EF1, EF3, EF4 and EF5. Target peptides from Ran-binding protein M and myo-inositol monophosphatase, along with a new target from procaspase-3, are shown to interact with the protein on a surface comprised of alpha5 (EF3), alpha8 (EF4) and the EF2-EF3 and EF4-EF5 loops. Fluorescence experiments reveal that calbindin-D(28K) adopts discrete hydrophobic states as it binds Ca2+. The structure, binding interface and hydrophobic characteristics of Ca2+-loaded calbindin-D(28K) provide the first detailed insights into how this essential protein may function. This structure is one of the largest high-resolution NMR structures and the largest monomeric EF-hand protein to be solved to date.


    Organizational Affiliation

    Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, North Carolina 27695, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calbindin
A
263Rattus norvegicusMutation(s): 0 
Gene Names: Calb1
Find proteins for P07171 (Rattus norvegicus)
Go to UniProtKB:  P07171
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 900 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest restraint energy 
  • Olderado: 2G9B Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-04
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance