1QZ1

Crystal Structure of the Ig 1-2-3 fragment of NCAM

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.218 

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This is version 1.3 of the entry. See complete history. 


Literature

Structure and interactions of NCAM Ig1-2-3 suggest a novel zipper mechanism for homophilic adhesion

Soroka, V., Kolkova, K., Kastrup, J.S., Diederichs, K., Breed, J., Kiselyov, V.V., Poulsen, F.M., Larsen, I.K., Welte, W., Berezin, V., Bock, E., Kasper, C.

(2003) Structure 11: 1291-1301

  • DOI: 10.1016/j.str.2003.09.006
  • Primary Citation of Related Structures:  
    1QZ1

  • PubMed Abstract: 

    • The neural cell adhesion molecule, NCAM, mediates Ca(2+)-independent cell-cell and cell-substratum adhesion via homophilic (NCAM-NCAM) and heterophilic (NCAM-non-NCAM molecules) binding. NCAM plays a key role in neural development, regeneration, and synaptic plasticity, including learning and memory consolidation ...

    The neural cell adhesion molecule, NCAM, mediates Ca(2+)-independent cell-cell and cell-substratum adhesion via homophilic (NCAM-NCAM) and heterophilic (NCAM-non-NCAM molecules) binding. NCAM plays a key role in neural development, regeneration, and synaptic plasticity, including learning and memory consolidation. The crystal structure of a fragment comprising the three N-terminal Ig modules of rat NCAM has been determined to 2.0 A resolution. Based on crystallographic data and biological experiments we present a novel model for NCAM homophilic binding. The Ig1 and Ig2 modules mediate dimerization of NCAM molecules situated on the same cell surface (cis interactions), whereas the Ig3 module mediates interactions between NCAM molecules expressed on the surface of opposing cells (trans interactions) through simultaneous binding to the Ig1 and Ig2 modules. This arrangement results in two perpendicular zippers forming a double zipper-like NCAM adhesion complex.

    Related Citations: 
    • STRUCTURAL BASIS OF CELL-CELL ADHESION BY NCAM
      Kasper, C., Rasmussen, H., Kastrup, J.S., Ikemizu, S., Jones, E.Y., Berezin, V., Bock, E., Larsen, I.K.
      (2000) Nat Struct Biol 7: 389
    • Expression, crystallization and preliminary X-ray analysis of the two amino-terminal Ig domains of the neural cell adhesion molecule (NCAM)
      Kasper, C., Rasmussen, H., Berezin, V., Bock, E., Larsen, I.K.
      (1999) Acta Crystallogr D Biol Crystallogr 55: 1598
    Organizational Affiliation: 

    Protein Laboratory, Institute of Molecular Pathology, Panum Institute, Blegdamsvej 3 C, DK-2200 Copenhagen, Denmark.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Neural cell adhesion molecule 1, 140 kDa isoformA291Rattus norvegicusMutation(s): 0 
Gene Names: Ncam1, Ncam
UniProt
Find proteins for P13596 (Rattus norvegicus)
Explore P13596 
Go to UniProtKB:  P13596
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13596
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.218 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.44α = 90
b = 107.76β = 90
c = 149.3γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-04
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection