Macromolecule Content

• Total Structure Weight: 16672.16 
• Atom Count: 1059 
• Residue Count: 148 
• Unique protein chains: 1

2KIV

AIDA-1 SAM domain tandem

• DOI: 10.2210/pdb2KIV/pdb
• BMRB: 16297

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 3 


• Deposited: 2009-05-12 Released: 2009-08-25 
• Deposition Author(s): Donaldson, L.W., Kurabi, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

A nuclear localization signal at the SAM-SAM domain interface of AIDA-1 suggests a requirement for domain uncoupling prior to nuclear import.

Kurabi, A., Brener, S., Mobli, M., Kwan, J.J., Donaldson, L.W.

(2009) J.Mol.Biol. 392: 1168-1177

• PubMed: 19666031 
• DOI: 10.1016/j.jmb.2009.08.004


• PubMed Abstract: 
  

The neuronal scaffolding protein AIDA-1 is believed to act as a convener of signals arising at postsynaptic densities. Among the readily identifiable domains in AIDA-1, two closely juxtaposed sterile alpha motif (SAM) domains and a phosphotyrosine binding domain are located within the C-terminus of the longest splice variant and exclusively in four shorter splice variants. As a first step towards understanding the possible emergent properties arising from this assembly of ligand binding domains, we have used NMR methods to solve the first structure of a SAM domain tandem. Separated by a 15-aa linker, the two SAM domains are fused in a head-to-tail orientation that has been observed in other hetero- and homotypic SAM domain structures. The basic nuclear import signal for AIDA-1 is buried at the interface between the two SAM domains. An observed disparity between the thermal stabilities of the two SAM domains suggests a mechanism whereby the second SAM domain decouples from the first SAM domain to facilitate translocation of AIDA-1 to the nucleus.

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Organizational Affiliation: 

Department of Biology, York University, Toronto, Ontario, Canada.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Ankyrin repeat and sterile alpha motif domain-containing protein 1B	A	148	Homo sapiens	Mutation(s): 3  Gene Names: ANKS1B
Find proteins for Q7Z6G8 (Homo sapiens) Go to Gene View: ANKS1B Go to UniProtKB:  Q7Z6G8

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 
• Olderado: 2KIV Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-05-12 
• Released Date: 2009-08-25 
• Deposition Author(s): Donaldson, L.W., Kurabi, A.

Revision History 

• Version 1.0: 2009-08-25
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance