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Wang X, et al.  (2009) Mutation in MTO1 involved in tRNA modification impairs mitochondrial RNA metabolism in the yeast Saccharomyces cerevisiae. Mitochondrion 9(3):180-5

Abstract: The yeast MTO1 gene encodes an evolutionarily conserved protein for the biosynthesis of the 5-carboxymethylaminomethyl group of cmnm(5)s(2)U in the wobble position of mitochondrial tRNA. However, mto1 null mutant expressed the respiratory deficient phenotype only when coupled with the C1409G mutation of mitochondrial 15S rRNA. To further understand the role of MTO1 in mitochondrial RNA metabolism, the yeast mto1 null mutants carrying either wild-type (P(S)) or 15S rRNA C1409G allele (P(R)) have been characterized by examining the steady-state levels, aminoacylation capacity of mitochondrial tRNA, mitochondrial gene expression and petite formation. The steady-state levels of tRNA(Lys), tRNA(Glu), tRNA(Gln), tRNA(Leu), tRNA(Gly), tRNA(Arg) and tRNA(Phe) were decreased significantly while those of tRNA(Met) and tRNA(His) were not affected in themto1 strains carrying the P(S) allele. Strikingly, the combination of the mto1 and C1409G mutations gave rise to the synthetic phenotype for some of the tRNAs, especially in tRNA(Lys), tRNA(Met) and tRNA(Phe). Furthermore, the mto1 strains exhibited a marked reduction in the aminoacylation levels of mitochondrial tRNA(Lys), tRNA(Leu), tRNA(Arg) but almost no effect in those of tRNA(His). In addition, the steady-state levels of mitochondrial COX1, COX2, COX3, ATP6 andATP9 mRNA were markedly decreased in mto1 strains. These data strongly indicate that unmodified tRNA caused by the deletion of MTO1 gene caused the instability of mitochondrial tRNAs and mRNAs and an impairment of aminoacylation of mitochondrial tRNAs. Consequently, the deletion of MTO1 gene acts in synergy with the 15S rRNA C1409G mutation, leading to the loss of COX1 synthesis and subsequent respiratory deficient phenotype.

Status: Published Type: Journal Article PubMed ID: 19460296

Topics addressed in this paper

Number of different genes curated to this paper: 153

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Topics Genes linked to topics (#1 - 10 )
ATP6 CDC65 COX2 COX3 COX9 EMT1 EMT2 EMT3 EMT4 EMT5
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Topics Genes linked to topics (#11 - 20 )
HSX1 IMT1 IMT2 IMT3 IMT4 MOT1 MTO1 OLI1 SOE1 SUF1
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Topics Genes linked to topics (#21 - 30 )
SUF16 SUF17 SUF20 SUF3 SUF4 SUF5 SUF6 SUP51 SUP53 SUP54
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Topics Genes linked to topics (#31 - 40 )
SUP56 tE(CUC)D tE(CUC)I tE(UUC)B tE(UUC)C tE(UUC)E1 tE(UUC)E2 tE(UUC)E3 tE(UUC)G2 tE(UUC)G3
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Topics Genes linked to topics (#41 - 50 )
tE(UUC)I tE(UUC)J tE(UUC)K tE(UUC)L tE(UUC)M tE(UUC)P tE(UUC)Q tF(GAA)B tF(GAA)D tF(GAA)F
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Topics Genes linked to topics (#51 - 60 )
tF(GAA)G tF(GAA)H1 tF(GAA)H2 tF(GAA)M tF(GAA)N tF(GAA)P1 tF(GAA)P2 tF(GAA)Q tG(GCC)B tG(GCC)D1
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Topics Genes linked to topics (#61 - 70 )
tG(GCC)D2 tG(GCC)E tG(GCC)F2 tG(GCC)G1 tG(GCC)G2 tG(GCC)J1 tG(GCC)J2 tG(GCC)M tG(GCC)O1 tG(GCC)P1
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Topics Genes linked to topics (#71 - 80 )
tG(GCC)P2 tG(UCC)Q tH(GUG)E1 tH(GUG)E2 tH(GUG)G1 tH(GUG)G2 tH(GUG)H tH(GUG)K tH(GUG)M tH(GUG)Q
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Topics Genes linked to topics (#81 - 90 )
tK(CUU)C tK(CUU)D1 tK(CUU)D2 tK(CUU)E1 tK(CUU)E2 tK(CUU)F tK(CUU)G1 tK(CUU)G2 tK(CUU)G3 tK(CUU)I
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Topics Genes linked to topics (#91 - 100 )
tK(CUU)J tK(CUU)K tK(CUU)M tK(CUU)P tK(UUU)D tK(UUU)G1 tK(UUU)G2 tK(UUU)K tK(UUU)L tK(UUU)O
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Topics Genes linked to topics (#101 - 110 )
tK(UUU)P tK(UUU)Q tL(CAA)D tL(CAA)G1 tL(CAA)G3 tL(CAA)K tL(CAA)L tL(CAA)M tL(CAA)N tL(GAG)G
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Topics Genes linked to topics (#111 - 120 )
tL(UAA)B1 tL(UAA)B2 tL(UAA)D tL(UAA)K tL(UAA)L tL(UAA)N tL(UAA)Q tL(UAG)J tL(UAG)L1 tL(UAG)L2
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Topics Genes linked to topics (#121 - 130 )
tM(CAU)C tM(CAU)Q1 tM(CAU)Q2 tQ(UUG)B tQ(UUG)C tQ(UUG)D1 tQ(UUG)D2 tQ(UUG)D3 tQ(UUG)E1 tQ(UUG)E2
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Topics Genes linked to topics (#131 - 140 )
tQ(UUG)H tQ(UUG)L tQ(UUG)Q tR(ACG)D tR(ACG)E tR(ACG)J tR(ACG)K tR(ACG)L tR(ACG)O tR(ACG)Q2
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Topics Genes linked to topics (#141 - 150 )
tR(UCU)B tR(UCU)D tR(UCU)E tR(UCU)G1 tR(UCU)G2 tR(UCU)G3 tR(UCU)J1 tR(UCU)J2 tR(UCU)K tR(UCU)M1
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Topics Genes linked to topics (#151 - 153 )
tR(UCU)M2 tR(UCU)Q1 TRR4
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