Homodimeric cross-over structure of the human granulocyte colony-stimulating factor (GCSF) receptor signaling complex.
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Tamada T, Honjo E, Maeda Y, Okamoto T, Ishibashi M, Tokunaga M, Kuroki R
Homodimeric cross-over structure of the human granulocyte colony-stimulating factor (GCSF) receptor signaling complex.
Proc Natl Acad Sci U S A. 2006 Feb 28;103(9):3135-40. Epub 2006 Feb 21.
- PubMed ID
- 16492764 [ View in PubMed]
- Abstract
A crystal structure of the signaling complex between human granulocyte colony-stimulating factor (GCSF) and a ligand binding region of GCSF receptor (GCSF-R), has been determined to 2.8 A resolution. The GCSF:GCSF-R complex formed a 2:2 stoichiometry by means of a cross-over interaction between the Ig-like domains of GCSF-R and GCSF. The conformation of the complex is quite different from that between human GCSF and the cytokine receptor homologous domain of mouse GCSF-R, but similar to that of the IL-6/gp130 signaling complex. The Ig-like domain cross-over structure necessary for GCSF-R activation is consistent with previously reported thermodynamic and mutational analyses.