Download MendeleyHexameric structure of the ATPase motor subunit of magnesium chelatase in chlorophyll biosynthesis.
Gao, Y.S., Wang, Y.L., Wang, X., Liu, L.(2020) Protein Sci 29: 1040-1046
- PubMed: 31891428
- DOI: https://doi.org/10.1002/pro.3816
- Primary Citation of Related Structures:
6L8D - PubMed Abstract:
Magnesium chelatase (MgCh) is a heterotrimeric enzyme complex, composed of two AAA+ family subunits that can assembly into a double ring structure and a large catalytic subunit. The small AAA+ subunit has ATPase activity and can self-oligomerize into a ring structure, while the other AAA+ subunit lacks independent ATPase activity. Previous structural studies of the ATPase motor subunit of MgCh from a bacteriochlorophyll-synthesizing bacterium have identified a unique ATPase clade, but the model of oligomeric assembly is unclear. Here we present the hexameric structure of the MgCh ATPase motor subunit from the chlorophyll-synthesizing cyanobacterium Synechocystis sp. PCC 6803. This structure reveals details of how the hexameric ring is assembled, and thus provides a basis for further studying the heterotrimeric complex.
Organizational Affiliation:
School of Life Sciences and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui, China.
