期刊
BIOCHEMICAL JOURNAL
卷 405, 期 -, 页码 351-357出版社
PORTLAND PRESS LTD
DOI: 10.1042/BJ20061737
关键词
anticoagulant; blood coagulation; gamma-carboxyglutamic acid (Gla)-rich domain (Gla domain); factor IX-binding protein (IX-bp); factor X phospholipid membrane
A potent anticoagulant protein, IX-bp (Factor IX binding protein), has been isolated from the venom of Trimeresurus flavoviridis (habu snake) and is known to bind specifically to the Gla (gamma-carboxyglutamic acid-rich) domain of Factor IX. To evaluate the molecular basis for its anticoagulation activity, we assessed its interactions with various clotting factors. We found that the anticoagulation activity is primarily due to binding to the Gla domains of Factors IX and X, thus preventing these factors from recognizing phosphatidylserine on the plasma membrane. The present study suggests that ligands that bind to the Gla domains of Factors IX and X may have the potential to become novel anticoagulants.
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