1SY9

Structure of calmodulin complexed with a fragment of the olfactory CNG channel


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of calmodulin complexed with an olfactory CNG channel fragment and role of the central linker: residual dipolar couplings to evaluate calmodulin binding modes outside the kinase family.

Contessa, G.M.Orsale, M.Melino, S.Torre, V.Paci, M.Desideri, A.Cicero, D.O.

(2005) J.Biomol.Nmr 31: 185-199

  • DOI: 10.1007/s10858-005-0165-1

  • PubMed Abstract: 
  • The NMR high-resolution structure of calmodulin complexed with a fragment of the olfactory cyclic-nucleotide gated channel is described. This structure shows features that are unique for this complex, including an active role of the linker connecting ...

    The NMR high-resolution structure of calmodulin complexed with a fragment of the olfactory cyclic-nucleotide gated channel is described. This structure shows features that are unique for this complex, including an active role of the linker connecting the N- and C-lobes of calmodulin upon binding of the peptide. Such linker is not only involved in the formation of an hydrophobic pocket to accommodate a bulky peptide residue, but it also provides a positively charged region complementary to a negative charge of the target. This complex of calmodulin with a target not belonging to the kinase family was used to test the residual dipolar coupling (RDC) approach for the determination of calmodulin binding modes to peptides. Although the complex here characterized belongs to the (1--14) family, high Q values were obtained with all the 1:1 complexes for which crystalline structures are available. Reduction of the RDC data set used for the correlation analysis to structured regions of the complex allowed a clear identification of the binding mode. Excluded regions comprise calcium binding loops and loops connecting the EF-hand motifs.


    Related Citations: 
    • Two distinct Ca2+-Calmodulin interactions with N-terminal regions of the olfactory and rod cyclic nucleotide gated channels characterized by NMR spectroscopy
      Orsale, M.,Melino, S.,Contessa, G.M.,Torre, V.,Andreotti, G.,Motta, A.,Paci, M.,Desideri, A.,Cicero, D.O.
      (2003) FEBS Lett. 548: 11


    Organizational Affiliation

    Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica, 00133, Rome, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CALMODULIN
A
148Xenopus laevisMutation(s): 0 
Gene Names: calm2-b
Find proteins for P0DP35 (Xenopus laevis)
Go to UniProtKB:  P0DP35
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cyclic-nucleotide-gated olfactory channel
B
26Bos taurusMutation(s): 0 
Gene Names: CNGA2 (CNCG2)
Find proteins for Q03041 (Bos taurus)
Go to Gene View: CNGA2
Go to UniProtKB:  Q03041
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1SY9 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-04-12
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance