Structural highlights
Function
Q9HK10_THEAC
Publication Abstract from PubMed
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-A 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 25A 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.
The 1.8-A Crystal Structure of the N-Terminal Domain of an Archaeal MCM as a Right-Handed Filament.,Fu Y, Slaymaker IM, Wang J, Wang G, Chen XS J Mol Biol. 2013 Dec 27. pii: S0022-2836(13)00812-7. doi:, 10.1016/j.jmb.2013.12.025. PMID:24378617[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Fu Y, Slaymaker IM, Wang J, Wang G, Chen XS. The 1.8-A Crystal Structure of the N-Terminal Domain of an Archaeal MCM as a Right-Handed Filament. J Mol Biol. 2013 Dec 27. pii: S0022-2836(13)00812-7. doi:, 10.1016/j.jmb.2013.12.025. PMID:24378617 doi:http://dx.doi.org/10.1016/j.jmb.2013.12.025
