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    J Mol Biol. 1992 Apr 20;224(4):1075-85.

    Three-dimensional structure of recombinant human granulocyte-macrophage colony-stimulating factor.

    Walter MR, Cook WJ, Ealick SE, Nagabhushan TL, Trotta PP, Bugg CE.

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    Department of Pathology, University of Alabama, Birmingham 35294.

    Abstract

    The crystal structure of recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) has been determined at 2.8 A resolution using multiple isomorphous replacement techniques. There are two molecules in the crystallographic asymmetric unit, which are related by an approximate non-crystallographic 2-fold axis. The overall structure is highly compact and globular with a predominantly hydrophobic core. The main structural feature of rhGM-CSF is a four alpha-helix bundle, which represents approximately 42% of the structure. The helices are arranged in a left-handed antiparallel bundle with two overhand connections. Within the connections is a two-stranded antiparallel beta-sheet. The tertiary structure of rhGM-CSF has a topology similar to that of porcine growth factor and interferon-beta. Most of the proposed critical regions for receptor binding are located on a continuous surface at one end of the molecule that includes the C terminus.

    PMID:
    1569568
    [PubMed - indexed for MEDLINE]

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