Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.28 kDa 
• Atom Count: 860 
• Modelled Residue Count: 107 
• Deposited Residue Count: 107 
• Unique protein chains: 2

1ZL8

NMR structure of L27 heterodimer from C. elegans Lin-7 and H. sapiens Lin-2 scaffold proteins

• PDB DOI: 10.2210/pdb1ZL8/pdb

• Classification: PROTEIN BINDING
• Organism(s): Caenorhabditis elegans, Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2005-05-05 Released: 2005-09-13 
• Deposition Author(s): Petrosky, K.Y., Ou, H.D., Lohr, F., Dotsch, V., Lim, W.A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

A General Model for Preferential Hetero-oligomerization of LIN-2/7 Domains: Mechanism Underlying Directed Assembly of Supramolecular Signaling Complexes

Petrosky, K.Y., Ou, H.D., Lohr, F., Dotsch, V., Lim, W.A.

(2005) J Biol Chem 280: 38528-38536

• PubMed: 16147993 
• DOI: 10.1074/jbc.M506536200
• Primary Citation of Related Structures:  
  1ZL8


• PubMed Abstract: 
  

LIN-2/7 (L27) domains are protein interaction modules that preferentially hetero-oligomerize, a property critical for their function in directing specific assembly of supramolecular signaling complexes at synapses and other polarized cell-cell junctions. We have solved the solution structure of the heterodimer composed of the L27 domains from LIN-2 and LIN-7. Comparison of this structure with other L27 domain structures has allowed us to formulate a general model for why most L27 domains form an obligate heterodimer complex. L27 domains can be divided in two types (A and B), with each heterodimer comprising an A/B pair. We have identified two keystone positions that play a central role in discrimination. The residues at these positions are energetically acceptable in the context of an A/B heterodimer, but would lead to packing defects or electrostatic repulsion in the context of A/A and B/B homodimers. As predicted by the model, mutations of keystone residues stabilize normally strongly disfavored homodimers. Thus, L27 domains are specifically optimized to avoid homodimeric interactions.

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Organizational Affiliation: 

Biophysics Graduate Program, University of California, San Francisco, California 94143, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LIN-7	A	53	Caenorhabditis elegans	Mutation(s): 0  Gene Names: LIN7
UniProt
Find proteins for P90976 (Caenorhabditis elegans) Explore P90976  Go to UniProtKB:  P90976

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Peripheral plasma membrane protein CASK	B	54	Homo sapiens	Mutation(s): 0  Gene Names: CASK, LIN2 EC: 2.7.1 (PDB Primary Data), 2.7.11.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for O14936 (Homo sapiens) Explore O14936  Go to UniProtKB:  O14936
PHAROS:  O14936

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1ZL8 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-05-05 
• Released Date: 2005-09-13 
Deposition Author(s): Petrosky, K.Y., Ou, H.D., Lohr, F., Dotsch, V., Lim, W.A.

Revision History  

• Version 1.0: 2005-09-13
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance