1K9A

Crystal structure analysis of full-length carboxyl-terminal Src kinase at 2.5 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.246 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the carboxyl-terminal Src kinase, Csk.

Ogawa, A.Takayama, Y.Sakai, H.Chong, K.T.Takeuchi, S.Nakagawa, A.Nada, S.Okada, M.Tsukihara, T.

(2002) J.Biol.Chem. 277: 14351-14354

  • DOI: 10.1074/jbc.C200086200

  • PubMed Abstract: 
  • The carboxyl-terminal Src kinase (Csk) is an indispensable negative regulator for the Src family tyrosine kinases (SFKs) that play pivotal roles in various cell signalings. To understand the molecular basis of the Csk-mediated regulation of SFKs, we ...

    The carboxyl-terminal Src kinase (Csk) is an indispensable negative regulator for the Src family tyrosine kinases (SFKs) that play pivotal roles in various cell signalings. To understand the molecular basis of the Csk-mediated regulation of SFKs, we elucidated the crystal structure of full-length Csk. The Csk crystal consists of six molecules classified as active or inactive states according to the coordinations of catalytic residues. Csk assembles the SH2 and SH3 domains differently from inactive SFKs, and their binding pockets are oriented outward enabling the intermolecular interaction. In active molecules, the SH2-kinase and SH2-SH3 linkers are tightly stuck to the N-lobe of the kinase domain to stabilize the active conformation, and there is a direct linkage between the SH2 and the kinase domains. In inactive molecules, the SH2 domains are rotated destroying the linkage to the kinase domain. Cross-correlation matrices for the active molecules reveal that the SH2 domain and the N-lobe of the kinase domain move as a unit. These observations suggest that Csk can be regulated through coupling of the SH2 and kinase domains and that Csk provides a novel built-in activation mechanism for cytoplasmic tyrosine kinases.


    Organizational Affiliation

    Institute for Protein Research, Osaka University, 3-2 Yamadaoka and Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carboxyl-terminal Src kinase
A, B, C, D, E, F
450Rattus norvegicusGene Names: Csk
EC: 2.7.10.2
Find proteins for P32577 (Rattus norvegicus)
Go to UniProtKB:  P32577
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.246 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 115.000α = 90.00
b = 162.600β = 90.00
c = 232.400γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
CCP4data scaling
MOSFLMdata reduction
SHELXSphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance