VON WILLEBRAND FACTOR AND PLATELET-MEDIATED HEMOSTASIS

描述：（改编自研究者摘要） 项目是：（a）确定vWF分子的区域， 负责与血小板、胶原蛋白和 蛋白聚糖;（B）确定这些蛋白聚糖的三维结构 结合结构域;和（c）表征分子机制 负责vWF与其配体的结合。 上的功能域 vWF分子将通过蛋白水解来鉴定和表征。 通过vWF的化学和酶促修饰， 以及通过使用单克隆抗体， vWF。 这些片段的结构将通过制备和 通过片段的氨基酸测序，对牛vWF的cDNA进行测序， and by physical物理studies研究of these fragments碎片. 上的互补域 还将通过蛋白水解制备vWF的血小板受体， 血小板膜糖蛋白Ib的断裂。机制 相互作用将通过制备合成肽类似物来定义， 结合结构域，并检查它们与vWF和糖蛋白Ib的结合。

DESCRIPTION: (Adapted from investigator's abstract) The goals of this project are: (a) to identify the regions of the vWF molecule which are responsible for its binding to platelets, to collagen, and to proteoglycans; (b) to determine the 3-dimensional structure of these binding domains; and (c) to characterize the molecular mechanism responsible for binding of vWF to its ligands. Functional domains on the vWF molecule will be identified and characterized by proteolytic fragmentation of the vWF, by chemical and enzymatic modification of vWF, and by use of monoclonal antibodies which inhibit specific functions of vWF. The structure of these fragments will be determined by preparing and sequencing the cDNA for bovine vWF, by amino acid sequencing of fragments, and by physical studies of these fragments. Complementary domains on the platelet receptor for vWF will also be prepared by proteolytic fragmentation of platelet membrane glycoprotein Ib. Mechanisms of interaction will be defined by preparation of synthetic peptide analogs of binding domains and examining their binding to vWF and glycoprotein Ib.