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The chloroplast genes encoding subunits of the H+-ATP synthase

✍ Scribed by Graham S. Hudson; John G. Mason

Publisher: Springer
Year: 1988
Tongue: English
Weight: 972 KB
Volume: 18
Category: Article
ISSN: 0166-8595
DOI: 10.1007/bf00042985

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✦ Synopsis

Three CFt and three CF 0 subunits of the chloroplast H+-ATP synthase are encoded on the chloroplast genome. The chloroplast atp genes are organized as two operons in plants but not in the green alga, Chlamydomonas reinhardtii. The atpBE or /~ operon shows a relatively simple organisation and transcription pattern, while the atplHFA or ~ operon is transcribed into a large variety of mRNAs. The atp genes are related to those of cyanobacteria and, more distantly, to those of non-photosynthetic bacteria such as E. coli, suggesting a common origin of most F t F 0 ATP synthase subunits. Both the chloroplast and cyanobacterial ATP synthases have four F 0 subunits, not three as in the E. coli complex. The proton pore of the CF 0 is proposed to be formed by the interaction of subunits III and IV.

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