AIDA-1 SAM domain tandem

Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report

This is version 1.5 of the entry. See complete history


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

  • DOI: https://doi.org/10.1016/j.jmb.2009.08.004
  • Primary Citation of Related Structures:  

  • 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.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ankyrin repeat and sterile alpha motif domain-containing protein 1B148Homo sapiensMutation(s): 3 
Gene Names: AIDA-1bANKS1B
UniProt & NIH Common Fund Data Resources
Find proteins for Q7Z6G8 (Homo sapiens)
Explore Q7Z6G8 
Go to UniProtKB:  Q7Z6G8
GTEx:  ENSG00000185046 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7Z6G8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-02-26
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 1.3: 2021-10-13
    Changes: Database references
  • Version 1.4: 2023-06-14
    Changes: Other
  • Version 1.5: 2024-05-08
    Changes: Data collection, Database references