1LKJ

NMR Structure of Apo Calmodulin from Yeast Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 31 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The solution structure of apocalmodulin from Saccharomyces cerevisiae implies a mechanism for its unique Ca2+ binding property.

Ishida, H.Nakashima, K.Kumaki, Y.Nakata, M.Hikichi, K.Yazawa, M.

(2002) Biochemistry 41: 15536-15542


  • PubMed Abstract: 
  • We have determined the solution structure of calmodulin (CaM) from yeast (Saccharomyces cerevisiae) (yCaM) in the apo state by using NMR spectroscopy. yCaM is 60% identical in its amino acid sequence with other CaMs, and exhibits its unique biologica ...

    We have determined the solution structure of calmodulin (CaM) from yeast (Saccharomyces cerevisiae) (yCaM) in the apo state by using NMR spectroscopy. yCaM is 60% identical in its amino acid sequence with other CaMs, and exhibits its unique biological features. yCaM consists of two similar globular domains (N- and C-domain) containing three Ca(2+)-binding motifs, EF-hands, in accordance with the observed 3 mol of Ca(2+) binding. In the solution structure of yCaM, the conformation of the N-domain conforms well to the one of the expressed N-terminal half-domains of yCaM [Ishida, H., et al. (2000) Biochemistry 39, 13660-13668]. The conformation of the C-domain basically consists of a pair of helix-loop-helix motifs, though a segment corresponding to the forth Ca(2+)-binding site of CaM deviates in its primary structure from a typical EF-hand motif and loses the ability to bind Ca(2+). Thus, the resulting conformation of each domain is essentially identical to the corresponding domain of CaM in the apo state. A flexible linker connects the two domains as observed for CaM. Any evidence for the previously reported interdomain interaction in yCaM was not observed in the solution structure of the apo state. Hence, the interdomain interaction possibly occurs in the course of Ca(2+) binding and generates a cooperative Ca(2+) binding among all three sites. Preliminary studies on a mutant protein of yCaM, E104Q, revealed that the Ca(2+)-bound N-domain interacts with the apo C-domain and induces a large conformational change in the C-domain.


    Organizational Affiliation

    Division of Biological Sciences, High-Resolution NMR Laboratory, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
A
146Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: CMD1
Find proteins for P06787 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P06787
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 31 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 1LKJ Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-29
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance