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Identification and molecular cloning of a soluble human granulocyte-macrophage colony-stimulating factor receptor

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America; (United States)
; ; ; ;  [1];  [2]
  1. Univ. of California, Los Angeles (United States)
  2. Univ. of Rochester, NY (United States)

Granulocyte-macrophage colony-stimulating factor (GM-CSF) plays an important role in hematopoiesis and host defense via interaction with specific cell-surface receptors in target tissues. The authors identified a truncated, soluble form of the low-affinity GM-CSF receptor (GMR) in choriocarcinoma cells. Low-affinity GMR cDNAs encoding both the membrane-bound and soluble receptors were obtained by PCR using primers corresponding to the published sequence. Clones encoding the soluble receptor were identical in sequence to the membrane-bound form but contained a 97-nucleotide internal deletion. The amino acid sequence of this deleted cDNA predicts a protein that lacks the 84 C-terminal amino acids of the membrane-bound receptor, including the transmembrane and cytoplasmic domains, and contains 16 different amino acids at its C terminus. The striking similarity between the soluble form of the GMR and other hematopoietin receptors suggests that soluble binding proteins may play an important role in regulating the broad spectrum of biological responses mediated by these cytokines.

OSTI ID:
5604597
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America; (United States), Journal Name: Proceedings of the National Academy of Sciences of the United States of America; (United States) Vol. 88:18; ISSN PNASA; ISSN 0027-8424
Country of Publication:
United States
Language:
English

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