1M39

Solution structure of the C-terminal fragment (F86-I165) of the human centrin 2 in calcium saturated form


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 76 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

C-terminal half of human centrin 2 behaves like a regulatory EF-hand domain

Matei, E.Miron, S.Blouquit, Y.Duchambon, P.Durussel, P.Cox, J.A.Craescu, C.T.

(2003) Biochemistry 42: 1439-1450

  • DOI: 10.1021/bi0269714

  • PubMed Abstract: 
  • Human centrin 2 (HsCen2) is an EF-hand protein that plays a critical role in the centrosome duplication and separation during cell division. We studied the structural and Ca(2+)-binding properties of two C-terminal fragments of this protein: SC-HsCen ...

    Human centrin 2 (HsCen2) is an EF-hand protein that plays a critical role in the centrosome duplication and separation during cell division. We studied the structural and Ca(2+)-binding properties of two C-terminal fragments of this protein: SC-HsCen2 (T94-Y172), covering two EF-hands, and LC-HsCen2 (M84-Y172), having 10 additional residues. Both fragments are highly disordered in the apo state but become better structured (although not conformationally homogeneous) in the presence of Ca(2+) and depending on the nature of the cations (K(+) or Na(+)) in the buffer. Only the longer C-terminal domain, in the Ca(2+)-saturated state and in the presence of Na(+) ions, was amenable to structure determination by nuclear magnetic resonance. The solution structure of LC-HsCen2 reveals an open two EF-hand structure, similar to the conformation of related Ca(2+)-saturated regulatory domains. Unexpectedly, the N-terminal helix segment (F86-T94) lies over the exposed hydrophobic cavity. This unusual intramolecular interaction increases considerably the Ca(2+) affinity and constitutes a useful model for the target binding.


    Organizational Affiliation

    INSERM U350 and Institut Curie-Recherche, Centre Universitaire, B√Ętiments 110-112, 91405 Orsay, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Caltractin, isoform 1
A
89Homo sapiensMutation(s): 0 
Gene Names: CETN2 (CALT, CEN2)
Find proteins for P41208 (Homo sapiens)
Go to Gene View: CETN2
Go to UniProtKB:  P41208
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 76 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
  • Olderado: 1M39 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-25
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance