6P8G

Crystal structure of CDK4 in complex with CyclinD1 and P27


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

p27 allosterically activates cyclin-dependent kinase 4 and antagonizes palbociclib inhibition.

Guiley, K.Z.Stevenson, J.W.Lou, K.Barkovich, K.J.Kumarasamy, V.Wijeratne, T.U.Bunch, K.L.Tripathi, S.Knudsen, E.S.Witkiewicz, A.K.Shokat, K.M.Rubin, S.M.

(2019) Science 366

  • DOI: https://doi.org/10.1126/science.aaw2106
  • Primary Citation of Related Structures:  
    6P8E, 6P8F, 6P8G, 6P8H

  • PubMed Abstract: 

    The p27 protein is a canonical negative regulator of cell proliferation and acts primarily by inhibiting cyclin-dependent kinases (CDKs). Under some circumstances, p27 is associated with active CDK4, but no mechanism for activation has been described. We found that p27, when phosphorylated by tyrosine kinases, allosterically activated CDK4 in complex with cyclin D1 (CDK4-CycD1). Structural and biochemical data revealed that binding of phosphorylated p27 (phosp27) to CDK4 altered the kinase adenosine triphosphate site to promote phosphorylation of the retinoblastoma tumor suppressor protein (Rb) and other substrates. Surprisingly, purified and endogenous phosp27-CDK4-CycD1 complexes were insensitive to the CDK4-targeting drug palbociclib. Palbociclib instead primarily targeted monomeric CDK4 and CDK6 (CDK4/6) in breast tumor cells. Our data characterize phosp27-CDK4-CycD1 as an active Rb kinase that is refractory to clinically relevant CDK4/6 inhibitors.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
G1/S-specific cyclin-D1249Homo sapiensMutation(s): 0 
Gene Names: CCND1BCL1PRAD1
UniProt & NIH Common Fund Data Resources
Find proteins for P24385 (Homo sapiens)
Explore P24385 
Go to UniProtKB:  P24385
PHAROS:  P24385
GTEx:  ENSG00000110092 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24385
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclin-dependent kinase 4302Homo sapiensMutation(s): 2 
Gene Names: CDK4
EC: 2.7.11.22
UniProt & NIH Common Fund Data Resources
Find proteins for P11802 (Homo sapiens)
Explore P11802 
Go to UniProtKB:  P11802
PHAROS:  P11802
GTEx:  ENSG00000135446 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11802
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclin-dependent kinase inhibitor 1B72Homo sapiensMutation(s): 3 
Gene Names: CDKN1BKIP1
UniProt & NIH Common Fund Data Resources
Find proteins for P46527 (Homo sapiens)
Explore P46527 
Go to UniProtKB:  P46527
PHAROS:  P46527
GTEx:  ENSG00000111276 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP46527
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 
  • Space Group: P 21 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.58α = 90
b = 66.73β = 90
c = 184.85γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesGM124148
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesCA206244

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-25
    Type: Initial release
  • Version 1.1: 2024-03-13
    Changes: Data collection, Database references