Reference "Structure and transcription of the gene coding for subunit 3 of cytochrome oxidase in wheat mitochondria"

Reference ID

9084

Title

Structure and transcription of the gene coding for subunit 3 of cytochrome oxidase in wheat mitochondria

Source

Current genetics, 1990, vol. 17, pp. 41-47

Authors (4)

Gualberto-J-M	Domon-C
Weil-J-H	Grienenberger-J-M

Abstract

The wheat mitochondrial (mt) cox3 has been localized and sequenced. The gene
exists as a single copy in the wheat mt master chromosome and is transcribed
into a single 1.2 kb RNA, whose extremities have been mapped. Comparison of the
wheat and Oenothera cox3 sequences gives ambiguous indications concerning the
amino acid coded by the codon CGG. Upstream and downstream of the wheat cox3
gene, two short sequences of 43 bp and 69 bp respectively are present, which are
almost identical to sequences present in the flanking regions of other plant
mitochondrial genes. These common sequences seem to have played a role in the
rearrangements which caused sequence divergence of the plant mt genomes during
evolution. Furthermore, mapping of wheat and maize cox3 and cob transcripts
suggests that some of these common sequences can play a role in the regulation
of transcription or processing.