Macromolecule Content

• Total Structure Weight: 11.89 kDa 
• Atom Count: 798 
• Modelled Residue Count: 96 
• Deposited Residue Count: 100 
• Unique protein chains: 1

2E6W

Solution structure and calcium binding properties of EF-hands 3 and 4 of calsenilin

• DOI: 10.2210/pdb2E6W/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-01-05 Released: 2007-11-27 
• Deposition Author(s): Yu, L., Sun, C., Mendoza, R., Hebert, E., Pereda-Lopez, A., Hajduk, P.J., Olejniczak, E.T.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Literature

Solution structure and calcium-binding properties of EF-hands 3 and 4 of calsenilin.

Yu, L., Sun, C., Mendoza, R., Wang, J., Matayoshi, E.D., Hebert, E., Pereda-Lopez, A., Hajduk, P.J., Olejniczak, E.T.

(2007) Protein Sci 16: 2502-2509

• PubMed: 17962406 
• DOI: 10.1110/ps.072928007
• Primary Citation of Related Structures:  
  2E6W


• PubMed Abstract: 
  

Calsenilin is a member of the recoverin branch of the EF-hand superfamily that is reported to interact with presenilins, regulate prodynorphin gene expression, modulate voltage-gated Kv4 potassium channel function, and bind to neurotoxins. Calsenilin is a Ca+2-binding protein and plays an important role in calcium signaling. Despite its importance in numerous neurological functions, the structure of this protein has not been reported. In the absence of Ca+2, the protein has limited spectral resolution that increases upon the addition of Ca+2. Here, we describe the three-dimensional solution structure of EF-hands 3 and 4 of calsenilin in the Ca+2-bound form. The Ca+2-bound structure consists of five alpha-helices and one two-stranded antiparallel beta-sheet. The long loop that connects EF hands 3 and 4 is highly disordered in solution. In addition to its structural effects, Ca+2 binding also increases the protein's propensity to dimerize. These changes in structure and oligomerization state induced upon Ca+2 binding may play important roles in molecular recognition during calcium signaling.

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Organizational Affiliation: 

Pharmaceutical Discovery Division, Global Pharmaceutical Research and Development, Abbott Laboratories, Abbott Park, IL 60064-6098, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Calsenilin	A	100	Homo sapiens	Mutation(s): 0  Gene Names: DREAM, KCHIP3, KCNIP3, CSEN
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y2W7 (Homo sapiens) Explore Q9Y2W7  Go to UniProtKB:  Q9Y2W7
PHAROS:  Q9Y2W7 GTEx:  ENSG00000115041

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	B [auth A], C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• OLDERADO: 2E6W Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-01-05 
• Released Date: 2007-11-27 
Deposition Author(s): Yu, L., Sun, C., Mendoza, R., Hebert, E., Pereda-Lopez, A., Hajduk, P.J., Olejniczak, E.T.

Revision History  

• Version 1.0: 2007-11-27
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance