2BZY

Homodimer of CrkL-SH3C domain

Summary for 2BZY

• Entry DOI: 10.2210/pdb2bzy/pdb
• Related: 2BZX
• Descriptor: CRK-LIKE PROTEIN (1 entity in total)
• Functional Keywords: crk-like, crkl, sh3 domain, dimer, nuclear export
• Biological source: HOMO SAPIENS (HUMAN)
• Total number of polymer chains: 2
• Total formula weight: 15103.23

Authors

Harkiolaki, M.,Gilbert, R.J.,Jones, E.Y.,Feller, S.M. (deposition date: 2005-08-24, release date: 2006-09-28, Last modification date: 2023-12-13)

Primary citation

Harkiolaki, M.,Gilbert, R.J.,Jones, E.Y.,Feller, S.M.
The C-Terminal SH3 Domain of Crkl as a Dynamic Dimerization Module Transiently Exposing a Nuclear Export Signal.
Structure, 14:1741-, 2006

PubMed Abstract: CRKL plays essential roles in cell signaling. It consists of an N-terminal SH2 domain followed by two SH3 domains. SH2 and SH3N bind to signaling proteins, but the function of the SH3C domain has remained largely enigmatic. We show here that the SH3C of CRKL forms homodimers in protein crystals and in solution. Evidence for dimer formation of full-length CRKL is also presented. In the SH3C dimer, a nuclear export signal (NES) is mostly buried under the domain surface. The same is true for a monomeric SH3C obtained under different crystallization conditions. Interestingly, partial SH3 unfolding, such as occurs upon dimer/monomer transition, produces a fully-accessible NES through translocation of a single beta strand. Our results document the existence of an SH3 domain dimer formed through exchange of the first SH3 domain beta strand and suggest that partial unfolding of the SH3C is important for the relay of information in vivo.

PubMed: 17161365
DOI: 10.1016/J.STR.2006.09.013

Experimental method

X-RAY DIFFRACTION (2.5 Å)