2B1O

Solution Structure of Ca2+-bound DdCAD-1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structures of the adhesion molecule DdCAD-1 reveal new insights into Ca(2+)-dependent cell-cell adhesion

Lin, Z.Sriskanthadevan, S.Huang, H.B.Siu, C.H.Yang, D.W.

(2006) Nat.Struct.Mol.Biol. 13: 1016-1022

  • DOI: 10.1038/nsmb1162
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • DdCAD-1 is a novel Ca(2+)-dependent cell adhesion molecule that lacks a hydrophobic signal peptide and a transmembrane domain. DdCAD-1 is expressed by the social amoeba Dictyostelium discoideum at the onset of development. It is synthesized as a solu ...

    DdCAD-1 is a novel Ca(2+)-dependent cell adhesion molecule that lacks a hydrophobic signal peptide and a transmembrane domain. DdCAD-1 is expressed by the social amoeba Dictyostelium discoideum at the onset of development. It is synthesized as a soluble protein and then transported to the plasma membrane by contractile vacuoles. Here we describe the novel features of the solution structures of Ca(2+)-free and Ca(2+)-bound monomeric DdCAD-1. DdCAD-1 contains two beta-sandwich domains, belonging to the betagamma-crystallin and immunoglobulin fold classes, respectively. Whereas the N-terminal domain has a major role in homophilic binding, the C-terminal domain tethers the protein to the cell membrane. From structural and mutational analyses, we propose a model for the Ca(2+)-bound DdCAD-1 dimer as a basis for understanding DdCAD-1-mediated cell-cell adhesion at the molecular level. Our results provide new insights into Ca(2+)-dependent mechanisms for cell-cell adhesion.


    Related Citations: 
    • (1)H, (13)C and (15)N resonance assignments of Ca(2+)-free DdCAD-1: a Ca(2+)-dependent cell-cell adhesion molecule
      Lin, Z.,Huang, H.B.,Siu, C.H.,Yang, D.W.
      (2004) J.Biomol.Nmr 30: 375


    Organizational Affiliation

    Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium-dependent cell adhesion molecule-1
A
212Dictyostelium discoideumMutation(s): 0 
Gene Names: cadA (cad1)
Find proteins for P54657 (Dictyostelium discoideum)
Go to UniProtKB:  P54657
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: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 
  • Olderado: 2B1O Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-09-26
    Type: Initial release
  • Version 1.1: 2007-12-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance