4EC8

Structure of full length CDK9 in complex with cyclinT and DRB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The CDK9 tail determines the reaction pathway of positive transcription elongation factor b.

Baumli, S.Hole, A.J.Wang, L.Z.Noble, M.E.Endicott, J.A.

(2012) Structure 20: 1788-1795

  • DOI: 10.1016/j.str.2012.08.011
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CDK9, the kinase of positive transcription elongation factor b (P-TEFb), stimulates transcription elongation by phosphorylating RNA polymerase II and transcription elongation factors. Using kinetic analysis of a human P-TEFb complex consisting of CDK ...

    CDK9, the kinase of positive transcription elongation factor b (P-TEFb), stimulates transcription elongation by phosphorylating RNA polymerase II and transcription elongation factors. Using kinetic analysis of a human P-TEFb complex consisting of CDK9 and cyclin T, we show that the CDK9 C-terminal tail sequence is important for the catalytic mechanism and imposes an ordered binding of substrates and release of products. Crystallographic analysis of a CDK9/cyclin T complex in which the C-terminal tail partially blocks the ATP binding site reveals a possible reaction intermediate. Biochemical characterization of CDK9 mutants supports a model in which the CDK9 tail cycles through different conformational states. We propose that this mechanism is critical for the pattern of CTD Ser2 phosphorylation on actively transcribed genes.


    Organizational Affiliation

    Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne NE2 4HH, UK. sbaumli@gmx.ch




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cyclin-dependent kinase 9
A
373Homo sapiensMutation(s): 0 
Gene Names: CDK9 (CDC2L4, TAK)
EC: 2.7.11.22, 2.7.11.23
Find proteins for P50750 (Homo sapiens)
Go to Gene View: CDK9
Go to UniProtKB:  P50750
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cyclin-T1
B
260Homo sapiensMutation(s): 3 
Gene Names: CCNT1
Find proteins for O60563 (Homo sapiens)
Go to Gene View: CCNT1
Go to UniProtKB:  O60563
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.192 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 175.050α = 90.00
b = 175.050β = 90.00
c = 101.280γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHENIXrefinement
PHENIXphasing
PHENIXmodel building
SCALAdata scaling
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-12
    Type: Initial release
  • Version 1.1: 2013-01-02
    Type: Database references
  • Version 1.2: 2014-10-22
    Type: Structure summary