The plant mitochondrial F₁‐ATPase

Abstract

The N-terminal amino acid sequence of the 20 kDa (3') subunit of the turnip (Brassica napus L.) mitochondrial F~-ATPase has been determined. Comparison of the sequence obtained with those of the e subunits of chloroplast CF~, E. coli F 1 and the ~ subunit of bovine F~ shows that the turnip 3' subunit is another member of this family of homologous proteins. The 3' subunit of sweet potato F~-ATPase [(1989) J. Biol. Chem. 264, 3183-3186] is very similar to the turnip sequence and thus can also be considered to belong to this family.