Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
Date (from‐to) : 2011 -2012
Author : MIZUSHIMA Tsunehiro; KATO Koichi; YAGI Hirokazu
The eukaryotic 20S proteasome is composed of 28 subunits arranged in a cylindrical particle as four heteroheptameric rings, α(1-7)β(1-7)β(1-7)α(1-7). To elucidate the mechanisms of proteasome assembly, we performed in vitro reconstitution experiments using separately purified subunits. In the result, we showed that the α-ring is stabilized by the binding of β subunits. Furthermore, we determined the crystal structures of the Hsm3, Hsm3-Rpt1-C complex and Rpn14 E384A mutant, respectively.