ジャーナル: Structure / 年: 2011 タイトル: Extracellular complexes of the hematopoietic human and mouse CSF-1 receptor are driven by common assembly principles. 著者: Jonathan Elegheert / Ambroise Desfosses / Alexander V Shkumatov / Xiongwu Wu / Nathalie Bracke / Kenneth Verstraete / Kathleen Van Craenenbroeck / Bernard R Brooks / Dmitri I Svergun / Bjorn ...著者: Jonathan Elegheert / Ambroise Desfosses / Alexander V Shkumatov / Xiongwu Wu / Nathalie Bracke / Kenneth Verstraete / Kathleen Van Craenenbroeck / Bernard R Brooks / Dmitri I Svergun / Bjorn Vergauwen / Irina Gutsche / Savvas N Savvides / 要旨: The hematopoietic colony stimulating factor-1 receptor (CSF-1R or FMS) is essential for the cellular repertoire of the mammalian immune system. Here, we report a structural and mechanistic consensus ...The hematopoietic colony stimulating factor-1 receptor (CSF-1R or FMS) is essential for the cellular repertoire of the mammalian immune system. Here, we report a structural and mechanistic consensus for the assembly of human and mouse CSF-1:CSF-1R complexes. The EM structure of the complete extracellular assembly of the human CSF-1:CSF-1R complex reveals how receptor dimerization by CSF-1 invokes a ternary complex featuring extensive homotypic receptor contacts and striking structural plasticity at the extremities of the complex. Studies by small-angle X-ray scattering of unliganded hCSF-1R point to large domain rearrangements upon CSF-1 binding, and provide structural evidence for the relevance of receptor predimerization at the cell surface. Comparative structural and binding studies aiming to dissect the assembly principles of human and mouse CSF-1R complexes, including a quantification of the CSF-1/CSF-1R species cross-reactivity, show that bivalent cytokine binding to receptor coupled to ensuing receptor-receptor interactions are common denominators in extracellular complex formation.
超分子 #1000: Complex of human Colony-Stimulating Factor-1 (hCSF-1) with the co...
超分子
名称: Complex of human Colony-Stimulating Factor-1 (hCSF-1) with the complete ectodomain of hCSF-1R タイプ: sample / ID: 1000 / 詳細: The sample was monodisperse / 集合状態: Dimeric / Number unique components: 2
生物種: Homo sapiens, HEK293T cell line / 組換プラスミド: pHLSec
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実験情報
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構造解析
手法
ネガティブ染色法
解析
単粒子再構成法
試料の集合状態
particle
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試料調製
緩衝液
pH: 7.5 / 詳細: 20 mM NaPO4 pH 7.40, 150 mM NaCl.
染色
タイプ: NEGATIVE 詳細: Purified sample at 0.2 mg/mL in PBS buffer was applied to the clear side of carbon on a carbon-mica interface and stained by floating on 2 % (w/v) uranyl acetate.
凍結
凍結剤: NONE / 装置: OTHER
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電子顕微鏡法
顕微鏡
JEOL 1200EXII
電子線
加速電圧: 100 kV / 電子線源: TUNGSTEN HAIRPIN
電子光学系
照射モード: OTHER / 撮影モード: OTHER / Cs: 2.1 mm / 倍率(公称値): 40000