Download MendeleyThe 1.8- angstrom Crystal Structure of the N-Terminal Domain of an Archaeal MCM as a Right-Handed Filament.
Fu, Y., Slaymaker, I.M., Wang, J., Wang, G., Chen, X.S.(2014) J Mol Biol 426: 1512-1523
- PubMed: 24378617
- DOI: https://doi.org/10.1016/j.jmb.2013.12.025
- Primary Citation of Related Structures:
4ME3 - PubMed Abstract:
Mini-chromosome maintenance (MCM) proteins are the replicative helicase necessary for DNA replication in both eukarya and archaea. Most of archaea only have one MCM gene. Here, we report a 1.8-Å crystal structure of the N-terminal MCM from the archaeon Thermoplasma acidophilum (tapMCM). In the structure, the MCM N-terminus forms a right-handed filament that contains six subunits in each turn, with a diameter of 25Å of the central channel opening. The inner surface is highly positively charged, indicating DNA binding. This filament structure with six subunits per turn may also suggests a potential role for an open-ring structure for hexameric MCM and dynamic conformational changes in initiation and elongation stages of DNA replication.
Organizational Affiliation:
Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA.
