Journal of Botany

Journal of Botany / 2010 / Article / Tab 1

Review Article

Cost of Having the Largest Mitochondrial Genome: Evolutionary Mechanism of Plant Mitochondrial Genome

Table 1

Unique ORFs that are fused with genuine mitochondrial genes.

Name of genePosition of fused unique OR Detection of fused polypeptideDetection of cleaved core regio Detection of cleaved extensio NoteReferences

Carrot atp8 C(57)YesYe No [84]
Carrot cox1 C(224, 284)NoYesND [85]
Maize rps2A C(330)YesYesYes [86]
Sugar beet Gnad9-1 C(14)YesNoN Complex I exhibits normal activity.[71]
Sorghum cox1 C(101)YesNoN Presumably associated with CMS.[87]
Petunia atp6 N(145)N YesN  [88]
Radish Ogura atp6 N(174)N YesN  [89]
Sugar beet atp6 N(387)N YesYesCleaved extension forms oligomer. Presumably associated with CMS.[83]
Sugar beet ccmC N(277)YesYesNo [90]

: carboxyl terminal; N: amino terminal; numbers in parenthesis indicate the amino acid residues encoded by the fused ORF.
2Polypeptides corresponding to the genuine mitochondrial gene.
3Polypeptides corresponding to the unique ORF.
4The extension may not be removed completely.
5ND: not determined.
6Polypeptides containing both the N-terminal extension and the core region of ATP6 have not been detected in any plant, perhaps due to rapid processing, or for unknown reasons (see references listed in the table).

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