Structure of the CMGC CDK Kinase from Giardia lamblia

Experimental Data Snapshot

  • Resolution: 1.85 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 

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This is version 1.3 of the entry. See complete history


Structure of a cyclin-dependent kinase from Giardia lamblia.

Leibly, D.J.Newling, P.A.Abendroth, J.Guo, W.Kelley, A.Stewart, L.J.Van Voorhis, W.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 1084-1089

  • DOI: https://doi.org/10.1107/S1744309111018070
  • Primary Citation of Related Structures:  
    3GBZ, 3GC0

  • PubMed Abstract: 

    Giardia lamblia is the etiologic agent of giardiasis, a water-borne infection that is prevalent throughout the world. The need for new therapeutics for the treatment of giardiasis is of paramount importance. Owing to the ubiquitous nature of kinases and their vital importance in organisms, they are potential drug targets. In this paper, the first structure of a cyclin-dependent kinase (CDK) from G. lamblia (GlCDK; UniProt A8BZ95) is presented. CDKs are cell-cycle-associated kinases that are actively being pursued as targets for anticancer drugs as well as for antiparasitic chemotherapy. Generally, a CDK forms a complex with its associated cyclin. This CDK-cyclin complex is active and acts as a serine/threonine protein kinase. Typically, CDKs are responsible for the transition to the next phase of the cell cycle. Although the structure of GlCDK with its associated cyclin was not solved, the 1.85 Å resolution structure of apo GlCDK and a 2.0 Å resolution structure of GlCDK in complex with adenosine monophosphate are presented and the structural differences from the orthologous human CDK2 and CDK3 are discussed.

  • Organizational Affiliation

    Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kinase, CMGC CDK329Giardia lamblia ATCC 50803Mutation(s): 0 
Gene Names: GL50803_8037
Find proteins for A8BZ95 (Giardia intestinalis (strain ATCC 50803 / WB clone C6))
Explore A8BZ95 
Go to UniProtKB:  A8BZ95
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA8BZ95
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.72α = 90
b = 73.05β = 90
c = 75.01γ = 90
Software Package:
Software NamePurpose
StructureStudiodata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2011-09-21
    Changes: Database references
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Refinement description