e-journal

Expression of a transferred nuclear gene in a mitochondrial genome

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tTransfer of mitochondrial genes to the nucleus, and subsequent gain of regulatory elements for expres-sion, is an ongoing evolutionary process in plants. Many examples have been characterized, which insome cases have revealed sources of mitochondrial targeting sequences and cis-regulatory elements. Incontrast, there have been no reports of a nuclear gene that has undergone intracellular transfer to themitochondrial genome and become expressed. Here we show that the orf164 gene in the mitochondrialgenome of several Brassicaceae species, including Arabidopsis, is derived from the nuclear ARF17 genethat codes for an auxin responsive protein and is present across flowering plants. Orf164 corresponds toa portion of ARF17, and the nucleotide and amino acid sequences are 79% and 81% identical, respectively.Orf164 is transcribed in several organ types of Arabidopsis thaliana, as detected by RT-PCR. In addition,orf164 is transcribed in five other Brassicaceae within the tribes Camelineae, Erysimeae and Cardamineae,but the gene is not present in Brassica or Raphanus. This study shows that nuclear genes can be transferredto the mitochondrial genome and become expressed, providing a new perspective on the movement ofgenes between the genomes of subcellular compartments.

Keywords:MitochondriaIntracellular gene transferGenome evolutionBrassicaceae

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Informasi Detail

Judul Seri

Current Plant Biology

No. Panggil

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Penerbit

: Elsevier., 2014

Deskripsi Fisik

Current Plant Biology 1 (2014) 68–72

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

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