Macromolecule Content

• Total Structure Weight: 10.39 kDa 
• Atom Count: 649 
• Modelled Residue Count: 80 
• Deposited Residue Count: 89 
• Unique protein chains: 1

1M39

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

• DOI: 10.2210/pdb1M39/pdb
• BMRB: 5503

• Classification: CELL CYCLE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2002-06-27 Released: 2003-03-25 
• Deposition Author(s): Matei, E., Miron, S., Blouquit, Y., Duchambon, P., Durussel, P., Cox, J.A., Craescu, C.T.

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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 

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

• PubMed: 12578356 
• DOI: 10.1021/bi0269714
• Primary Citation of Related Structures:  
  1M39


• 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-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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Caltractin, isoform 1	A	89	Homo sapiens	Mutation(s): 0  Gene Names: CEN2, CETN2, CALT
UniProt & NIH Common Fund Data Resources
Find proteins for P41208 (Homo sapiens) Explore P41208  Go to UniProtKB:  P41208
PHAROS:  P41208 GTEx:  ENSG00000147400

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

Entry History 

Deposition Data

• Deposited Date: 2002-06-27 
• Released Date: 2003-03-25 
Deposition Author(s): Matei, E., Miron, S., Blouquit, Y., Duchambon, P., Durussel, P., Cox, J.A., Craescu, C.T.

Revision History  

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