Abstract
Granulocyte colony-stimulating factor (GCSF) is the principal growth factor regulating the maturation, proliferation and differentiation of the precursor cells of neutrophilic granulocytes1 and is used to treat neutropenia2. GCSF is a member of the long-chain subtype of the class 1 cytokine superfamily, which includes growth hormone, erythropoietin, interleukin 6 and oncostatin M (ref. 3). Here we have determined the crystal structure of GCSF complexed to the BN–BC domains, the principal ligand-binding region of the GCSF receptor (GCSFR). The two receptor domains form a complex in a 2:2 ratio with the ligand, with a non-crystallographic pseudo-twofold axis through primarily the interdomain region and secondarily the BC domain. This structural view of a gp130-type receptor–ligand complex presents a new molecular basis for cytokine–receptor recognition.
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Acknowledgements
We thank N. Kamiya and M. Kawamoto for their help in the use of the data collection facilities at SPring-8, Hyogo, Japan, and N. Sakabe and N. Watanabe for use of the facilities at Photon Factory, Tsukuba, Japan. We thank S. Nagata for providing the GCSFR cDNA, E. Yanagihara and N. Okitsu for assistance in sample preparation, and Y. Kato, D. Kohda, H. Toh, K. Yamasaki and S. Tsutakawa for useful discussions. This study was partly supported by a grant from TARA (Tsukuba Advanced Research Alliance), University of Tsukuba, Japan.
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Aritomi, M., Kunishima, N., Okamoto, T. et al. Atomic structure of the GCSF–receptor complex showing a new cytokine–receptor recognition scheme. Nature 401, 713–717 (1999). https://doi.org/10.1038/44394
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DOI: https://doi.org/10.1038/44394
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