1IA8

THE 1.7 A CRYSTAL STRUCTURE OF HUMAN CELL CYCLE CHECKPOINT KINASE CHK1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The 1.7 A crystal structure of human cell cycle checkpoint kinase Chk1: implications for Chk1 regulation.

Chen, P.Luo, C.Deng, Y.Ryan, K.Register, J.Margosiak, S.Tempczyk-Russell, A.Nguyen, B.Myers, P.Lundgren, K.Kan, C.C.O'Connor, P.M.

(2000) Cell 100: 681-692


  • PubMed Abstract: 
  • The checkpoint kinase Chk1 is an important mediator of cell cycle arrest following DNA damage. The 1.7 A resolution crystal structures of the human Chk1 kinase domain and its binary complex with an ATP analog has revealed an identical open kinase con ...

    The checkpoint kinase Chk1 is an important mediator of cell cycle arrest following DNA damage. The 1.7 A resolution crystal structures of the human Chk1 kinase domain and its binary complex with an ATP analog has revealed an identical open kinase conformation. The secondary structure and side chain interactions stabilize the activation loop of Chk1 and enable kinase activity without phosphorylation of the catalytic domain. Molecular modeling of the interaction of a Cdc25C peptide with Chk1 has uncovered several conserved residues that are important for substrate selectivity. In addition, we found that the less conserved C-terminal region negatively impacts Chk1 kinase activity.


    Organizational Affiliation

    Agouron Pharmaceuticals, Inc. San Diego, California 92121, USA. ping.chen@agouron.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHK1 CHECKPOINT KINASE
A
289Homo sapiensGene Names: CHEK1 (CHK1)
EC: 2.7.11.1
Find proteins for O14757 (Homo sapiens)
Go to Gene View: CHEK1
Go to UniProtKB:  O14757
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.200α = 90.00
b = 65.700β = 93.90
c = 58.100γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
PHASESphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-04-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance