Structural analysis of the Sulfolobus solfataricus MCM protein N-terminal domain.
Structural analysis of the Sulfolobus solfataricus MCM protein N-terminal domain.
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DOI:
10.1093/nar/gkn183
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发表时间:
2008-06
影响因子:
14.9
通讯作者:
Ladenstein R
中科院分区:
文献类型:
--
作者:
Liu W;Pucci B;Rossi M;Pisani FM;Ladenstein R
The Mini-Chromosome Maintenance (MCM) proteins are candidates of replicative DNA helicase in eukarya and archaea. Here we report a 2.8 Å crystal structure of the N-terminal domain (residues 1–268) of the Sulfolobus solfataricus MCM (Sso MCM) protein. The structure reveals single-hexameric ring-like architecture, at variance from the protein of Methanothermobacter thermoautotrophicus (Mth). Moreover, the central channel in Sso MCM seems significantly narrower than the Mth counterpart, which appears to more favorably accommodate single-stranded DNA than double-stranded DNA, as supported by DNA-binding assays. Structural analysis also highlights the essential role played by the zinc-binding domain in the interaction with nucleic acids and allows us to speculate that the Sso MCM N-ter domain may function as a molecular clamp to grasp the single-stranded DNA passing through the central channel. On this basis possible DNA unwinding mechanisms are discussed.
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DOI:
10.1073/pnas.030539597
发表时间:
2000-02-15
影响因子:
11.1
作者:
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通讯作者:
Stillman, B
影响因子:
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影响因子:
64.8
作者:
Li, DW;Zhao, R;Chen, XJS
通讯作者:
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影响因子:
10.8
作者:
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通讯作者:
Timp, G