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Self-assembly mechanism of Rubisco Activase


Abstract The AAA+ ATPase Rubisco activase (Rca) regulates the activity of Rubisco, the photosynthetic enzyme responsible for catalyzing biological carbon fixation. However, the detailed mechanism by which Rca self-association controls Rubisco reactivation activity remains poorly understood. In this work, we are using fluorescence correlation spectroscopy (FCS) to better characterize the thermodynamics of the assembly process of cotton Rca. We present FCS data for Rca in the presence of Mg*ATPgS and Mg*ADP and for the D173N Walker B motif mutant in the presence of Mg*ATP. Our data are consistent with promotion and stabilization of hexamers by Mg*ATPgS and Mg*ATP, whereas Mg*ADP facilitates continuous assembly. We find that in the presence of Mg·ADP, ... (more)
Created Date 2014
Contributor Kuriata, Agnieszka Magdalena (Author) / Wachter, Rebekka (Advisor) / Redding, Kevin (Advisor) / Ghirlanda, Giovanna (Committee member) / Ros, Alexandra (Committee member) / Arizona State University (Publisher)
Subject Biochemistry / Chemistry
Type Doctoral Dissertation
Extent 163 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Biochemistry 2014
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis