Developmental Biology Program, Memorial Sloan-Kettering Cancer Center, Weill Cornell Graduate School of Medical Sciences, New York, NY, USA.
Cell Cycle. 2011 Nov 1;10(21):3636-44. doi: 10.4161/cc.10.21.18094.
DNA ligases are crucial for most DNA transactions, including DNA replication, repair, and recombination. Recently, DNA ligase III (Lig3) has been demonstrated to be crucial for cell survival due to its catalytic function in mitochondria. This review summarizes these recent results and reports on a hitherto unappreciated widespread phylogenetic presence of Lig3 in eukaryotes, including in some organisms before the divergence of metazoa. Analysis of these putative Lig3 homologs suggests that many of them are likely to be found in mitochondria and to be critical for mitochondrial function.
DNA 连接酶对于大多数 DNA 代谢过程至关重要,包括 DNA 复制、修复和重组。最近的研究表明,DNA 连接酶 III(Lig3)在催化线粒体中的功能对于细胞存活至关重要。本文总结了这些最新研究成果,并报道了 Lig3 在真核生物中广泛存在的现象,甚至包括在后生动物分歧之前的一些生物中。对这些假定的 Lig3 同源物的分析表明,其中许多可能存在于线粒体中,对于线粒体功能至关重要。