Notch Transmembrane Domain: Secondary Structure and Topology

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• 作者：Catherine L. Deatherage ; Zhenwei Lu ; Ji-Hun Kim ; Charles R. Sanders
• 刊名：Biochemistry
• 出版年：2015
• 出版时间：June 16, 2015
• 年：2015
• 卷：54
• 期：23
• 页码：3565-3568
• 全文大小：261K
• ISSN：1520-4995

文摘

The Notch signaling pathway is critical in development, neuronal maintenance, and hematopoiesis. An obligate step in the activation of this pathway is cleavage of its transmembrane (TM) domain by 纬-secretase. While the soluble domains have been extensively studied, little has been done to characterize its TM and flanking juxtamembrane (JM) segments. Here, we present the results of nuclear magnetic resonance (NMR) studies of the human Notch1 TM/JM domain. The TM domain is largely 伪-helical. While the flanking JM segments do not adopt regular secondary structure, they interact with the membrane surface, suggesting membrane interactions may play a role in modulating its cleavage by 纬-secretase and subsequent NOTCH signaling function.