6LNM

Crystal structure of CASK-CaMK in complex with Mint1-CID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structural Basis for the High-Affinity Interaction between CASK and Mint1.

Wu, X.Cai, Q.Chen, Y.Zhu, S.Mi, J.Wang, J.Zhang, M.

(2020) Structure 28: 664-673.e3

  • DOI: https://doi.org/10.1016/j.str.2020.04.001
  • Primary Citation of Related Structures:  
    6LNM

  • PubMed Abstract: 

    CASK forms an evolutionarily conserved tripartite complex with Mint1 and Veli critical for neuronal synaptic transmission and cell polarity. The CASK CaM kinase (CaMK) domain, in addition to interacting with Mint1, can also bind to many different target proteins, although the mechanism governing CASK-CaMK/target interaction selectivity is unclear. Here, we demonstrate that an extended sequence in the N-terminal unstructured region of Mint1 binds to CASK-CaMK with a dissociation constant of ∼7.5 nM. The high-resolution crystal structure of CASK-CaMK in complex with this Mint1 fragment reveals that the C-lobe of CASK-CaMK binds to a short sequence common to known CaMK targets and the N-lobe of CaMK engages an α helix that is unique to Mint1. Biochemical experiments together with structural analysis reveal that the CASK and Mint1 interaction is not regulated by Ca 2+ /CaM. The CASK/Mint1 complex structure provides mechanistic explanations for several CASK mutations identified in patients with brain disorders and cancers.


  • Organizational Affiliation

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peripheral plasma membrane protein CASK
A, C, E
351Rattus norvegicusMutation(s): 0 
Gene Names: Cask
EC: 2.7.11.1
UniProt
Find proteins for Q62915 (Rattus norvegicus)
Explore Q62915 
Go to UniProtKB:  Q62915
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ62915
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Amyloid-beta A4 precursor protein-binding family A member 1
B, D, F
50Mus musculusMutation(s): 0 
Gene Names: Apba1Mint1X11
UniProt
Find proteins for B2RUJ5 (Mus musculus)
Explore B2RUJ5 
Go to UniProtKB:  B2RUJ5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB2RUJ5
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.417α = 90
b = 151.417β = 90
c = 49.455γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
The University Grants Committee, Research Grants Council (RGC)Hong KongAoE-M09-12
The University Grants Committee, Research Grants Council (RGC)Hong KongC6004-17G

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-08
    Type: Initial release
  • Version 1.1: 2020-10-21
    Changes: Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description