Structure of the c2 domain from novel protein kinase C epsilon

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.234 

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Structure of the C2 Domain from Novel Protein Kinase Cepsilon. A Membrane Binding Model for Ca(2+ )-Independent C2 Domains

Ochoa, W.F.Garcia-Garcia, J.Fita, I.Corbalan-Garcia, S.Verdaguer, N.Gomez-Fernandez, J.C.

(2001) J Mol Biol 311: 837

  • DOI: https://doi.org/10.1006/jmbi.2001.4910
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Protein kinase Cepsilon (PKCepsilon) is a member of the novel PKCs which are activated by acidic phospholipids, diacylglycerol and phorbol esters, but lack the calcium dependence of classical PKC isotypes. The crystal structures of the C2 domain of PKCepsilon, crystallized both in the absence and in the presence of the two acidic phospholipids, 1,2-dicaproyl-sn-phosphatidyl-l-serine (DCPS) and 1,2-dicaproyl-sn-phosphatidic acid (DCPA), have now been determined at 2.1, 1.7 and 2.8 A resolution, respectively. The central feature of the PKCepsilon-C2 domain structure is an eight-stranded, antiparallel, beta-sandwich with a type II topology similar to that of the C2 domains from phospholipase C and from novel PKCdelta. Despite the similar topology, important differences are found between the structures of C2 domains from PKCs delta and epsilon, suggesting they be considered as different PKC subclasses. Site-directed mutagenesis experiments and structural changes in the PKCepsilon-C2 domain from crystals with DCPS or DCPA indicate, though phospholipids were not visible in these structures, that loops joining strands beta1-beta2 and beta5-beta6 participate in the binding to anionic membranes. The different behavior in membrane-binding and activation between PKCepsilon and classical PKCs appears to originate in localized structural changes, which include a major reorganization of the region corresponding to the calcium binding pocket in classical PKCs. A mechanism is proposed for the interaction of the PKCepsilon-C2 domain with model membranes that retains basic features of the docking of C2 domains from classical, calcium-dependent, PKCs.

  • Organizational Affiliation

    Instituto de Biología Molecular de Barcelona (CSIC), Jordi Girona Salgado 18-26, Barcelona, E-08034, Spain.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN KINASE C, EPSILON TYPE136Rattus rattusMutation(s): 0 
Membrane Entity: Yes 
Find proteins for P09216 (Rattus norvegicus)
Explore P09216 
Go to UniProtKB:  P09216
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09216
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on MG

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.3α = 90
b = 56.5β = 90
c = 60.3γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-10-25
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Derived calculations, Other