A subcomplex of human mitochondrial RNase P is a bifunctional methyltransferase--extensive moonlighting in mitochondrial tRNA biogenesis.
A subcomplex of human mitochondrial RNase P is a bifunctional methyltransferase--extensive moonlighting in mitochondrial tRNA biogenesis.
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DOI:
10.1093/nar/gks910
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发表时间:
2012-12
影响因子:
14.9
通讯作者:
Rossmanith W
中科院分区:
文献类型:
--
作者:
Vilardo E;Nachbagauer C;Buzet A;Taschner A;Holzmann J;Rossmanith W
Transfer RNAs (tRNAs) reach their mature functional form through several steps of processing and modification. Some nucleotide modifications affect the proper folding of tRNAs, and they are crucial in case of the non-canonically structured animal mitochondrial tRNAs, as exemplified by the apparently ubiquitous methylation of purines at position 9. Here, we show that a subcomplex of human mitochondrial RNase P, the endonuclease removing tRNA 5′ extensions, is the methyltransferase responsible for m1G9 and m1A9 formation. The ability of the mitochondrial tRNA:m1R9 methyltransferase to modify both purines is uncommon among nucleic acid modification enzymes. In contrast to all the related methyltransferases, the human mitochondrial enzyme, moreover, requires a short-chain dehydrogenase as a partner protein. Human mitochondrial RNase P, thus, constitutes a multifunctional complex, whose subunits moonlight in cascade: a fatty and amino acid degradation enzyme in tRNA methylation and the methyltransferase, in turn, in tRNA 5′ end processing.
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影响因子:
14.9
作者:
Ebhardt HA;Tsang HH;Dai DC;Liu Y;Bostan B;Fahlman RP
通讯作者:
Fahlman RP
影响因子:
4.5
作者:
Jackman, JE;Montange, RK;Phizicky, EM
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Phizicky, EM
影响因子:
10.5
作者:
Gutmann, Bernard;Gobert, Anthony;Giege, Philippe
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Giege, Philippe
影响因子:
14.9
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通讯作者:
Pütz J
影响因子:
13.8
作者:
HENTZE, MW
通讯作者:
HENTZE, MW