Notch Transmembrane Domain: Secondary Structure and Topology

作者：Deatherage Catherine L; Lu Zhenwei; Kim Ji Hun; Sanders Charles R^*

来源：Biochemistry, 2015, 54(23): 3565-3568.

DOI：10.1021/acs.biochem.5b00456

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 gamma-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 alpha-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 gamma-secretase and subsequent NOTCH signaling function.

• 出版日期2015-6-16