Structure of the C1-PH-CNH regulatory module of MRCK1

Experimental Data Snapshot

  • Resolution: 2.14 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 

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Structure and regulation of the myotonic dystrophy kinase-related Cdc42-binding kinase.

Truebestein, L.Antonioli, S.Waltenberger, E.Gehin, C.Gavin, A.C.Leonard, T.A.

(2023) Structure 31: 435

  • DOI: https://doi.org/10.1016/j.str.2023.02.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Protein kinases of the dystonia myotonica protein kinase (DMPK) family are critical regulators of actomyosin contractility in cells. The DMPK kinase MRCK1 is required for the activation of myosin, leading to the development of cortical tension, apical constriction, and early gastrulation. Here, we present the structure, conformation, and membrane-binding properties of Caenorhabditis elegans MRCK1. MRCK1 forms a homodimer with N-terminal kinase domains, a parallel coiled coil of 55 nm, and a C-terminal tripartite module of C1, pleckstrin homology (PH), and citron homology (CNH) domains. We report the high-resolution structure of the membrane-binding C1-PH-CNH module of MRCK1 and, using high-throughput and conventional liposome-binding assays, determine its binding to specific phospholipids. We further characterize the interaction of the C-terminal CRIB motif with Cdc42. The length of the coiled-coil domain of DMPK kinases is remarkably conserved over millions of years of evolution, suggesting that they may function as molecular rulers to position kinase activity at a fixed distance from the membrane.

  • Organizational Affiliation

    Department of Structural and Computational Biology, Max Perutz Labs, Campus Vienna Biocenter 5, 1030 Vienna, Austria; Department of Medical Biochemistry, Medical University of Vienna, 1090 Vienna, Austria.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein kinase mrck-1
A, B, C, D, E
582Caenorhabditis elegansMutation(s): 0 
Gene Names: mrck-1K08B12.5
Find proteins for O01583 (Caenorhabditis elegans)
Explore O01583 
Go to UniProtKB:  O01583
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO01583
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.14 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.142α = 81.38
b = 97.467β = 77.766
c = 131.413γ = 80.394
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Austrian Science FundAustriaT915
Austrian Science FundAustriaP28135

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-22
    Type: Initial release
  • Version 1.1: 2023-03-22
    Changes: Database references
  • Version 1.2: 2023-04-19
    Changes: Database references