The mitochondrial RNA ligase from Leishmania tarentolae can join RNA molecules bridged by a complementary RNA
The mitochondrial RNA ligase from Leishmania tarentolae can join RNA molecules bridged by a complementary RNA
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DOI：
10.1074/jbc.274.34.24289
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发表时间：
1999-08-20
影响因子：
4.8
通讯作者：
Simpson, L
中科院分区：
文献类型：
--
作者：
Blanc, V;Alfonzo, JD;Simpson, L
A biochemical characterization was performed with a partially purified RNA ligase from isolated mitochondria of Leishmania tarentolae. This ligase has a K-m of 25 +/- 0.75 nM and a V-max of 1.0 x 10(-4) + 2.4 x 10(-4) nmol/min when ligating a nicked double-stranded RNA substrate. Ligation was negatively affected by a gap between the donor and acceptor nucleotides. The catalytic efficiency of the circularization of a single-stranded substrate was B-fold less than that of the ligation of a nicked substrate. These properties of the mitochondrial RNA ligase are consistent with an expected in vivo role in the process of uridine insertion/deletion RNA editing, in which the mRNA cleavage fragments are bridged by a cognate guide RNA.
