1PXU

Crystal structure of chicken NtA from a eukaryotic source at 2.2A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and laminin-binding specificity of the NtA domain expressed in eukaryotic cells.

Mascarenhas, J.B.Ruegg, M.A.Sasaki, T.Eble, J.A.Engel, J.Stetefeld, J.

(2005) Matrix Biol. 23: 507-513

  • DOI: 10.1016/j.matbio.2004.11.003

  • PubMed Abstract: 
  • Agrin is a key organizer for postsynaptic differentiation at the neuromuscular junction (NMJ). This activity requires the binding of agrin to the synaptic basal lamina via its N-terminal (NtA) domain. It has been suggested that this binding is mediat ...

    Agrin is a key organizer for postsynaptic differentiation at the neuromuscular junction (NMJ). This activity requires the binding of agrin to the synaptic basal lamina via its N-terminal (NtA) domain. It has been suggested that this binding is mediated by conserved amino acids in the gamma 1 chain of laminin. Here, we report the crystal structure of chicken NtA expressed in eukaryotic HEK293 cells. In contrast to the previously published structure [Stetefeld, J., Jenny, M., Schulthess, T., Landwehr, R., Schumacher, B., Frank, S., Ruegg, M.A., Engel, J., Kammerer, R.A., 2001. The laminin-binding domain of agrin is structurally related to N-TIMP-1. Nat. Struct. Biol., 8, 705-709.], which was derived from the NtA domain expressed in E. coli, the new data show that the N-terminal tail region (amino acid residues Asn1-Arg5) is highly structured. Moreover, the disulfide bridge between Cys2 and Cys74 was also present. In addition, we show that the binding of NtA requires the gamma 1 chain of laminin and is not greatly affected by the composition of beta chains. These results confirm a model of the NtA-laminin complex where conserved amino acids in the gamma 1 chain are prerequisite for the binding to agrin and they further emphasize that the source of protein can be critical in structure determination.


    Organizational Affiliation

    Biozentrum Universit├Ąt Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
agrin
A
131Gallus gallusGene Names: AGRN (AGRIN)
Find proteins for P31696 (Gallus gallus)
Go to Gene View: AGRN
Go to UniProtKB:  P31696
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 86.685α = 90.00
b = 50.401β = 118.93
c = 54.571γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
CNSrefinement
AMoREphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2003-07-07 
  • Released Date: 2004-06-29 
  • Deposition Author(s): Stetefeld, J.

Revision History 

  • Version 1.0: 2004-06-29
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance