GrainGenes Reference Report: BBA-1519-199
Reference
BBA-1519-199
Title
Wheat mitochondria ccmB encodes the membrane domain of a putative ABC transporter involved in cytochrome c biogenesis
Journal
Biochimica et Biophysica Acta
Year
2001
Volume
1519
Pages
199-208
Author
Faivre-Nitschke SE Nazoa P Gualberto JM Grienenberger JM Bonnard G
Abstract
Summary: Assembly of cytochromes c is mediated by different proteins depending on the organism and organelle considered. In land plants, mitochondria follow a pathway distinct from that of yeast and animal mitochondria, more similar to that described for alpha- and gamma-proteobacteria. Indeed, in plant mitochondria, four genes were identified based on the similarities of their products with bacterial proteins involved in c-type cytochrome maturation. We report the characterisation of one of these mitochondrial genes in Triticum aestivum, TaccmB, which is proposed to encode a subunit of an ABC transporter. The transcript extremities were mapped and cDNA sequencing revealed 42 C to U editing positions in the 618 nucleotide long coding region. This high editing rate affects the identity of 32 amino acids out of 206. Antibodies directed against wheat CcmB recognise a 28 kDa protein in an enriched inner mitochondrial membrane protein fraction, a location which is in agreement with the high hydrophobicity of the protein and its function as a putative transmembrane domain of an ABC transporter involved in cytochrome c and c1 biogenesis in plant mitochondria
Keyword
abc transporter
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GrainGenes Reference Report: BBA-1519-199
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||