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Nucleic Acids Research, 1989, Vol. 17, No. 16 6569-6580
© 1989

ENZYMOLOGY

Wheat phospboglycerate kinase: evidence for recombination between toe genes for the chloroplastic and cytosolk enzymes

Marian Longstaff+, Christine A. Raines§, Eileen M. McMorrow1, J.William Bradbeer1 and Tristan A. Dyer*

Institute of Plant Science Research (Cambridge Laboratory) Maris Lane, Cambridge CB2 2JB, UK 1Division of Biosphere Sciences, King's College London Campden Hill Road, Kensington, London W8 7AH, UK

*To whom correspondence should be addressed

Received May 26, 1989. Revised July 28, 1989. Accepted July 28, 1989.

We have isolated and sequenced cDNA clones containing the entire coding region of both the chloroplast and cytosolic versions of phosphoglycerate kinase from wheat. Comparison of these sequences reveals a higher than expected level of similarity between the nucleic acids and encoded proteins. Analysis of this data in relation to that for phosphoglycerate kinase sequences of mammals, prokaryotes and yeasts suggests that the wheat genes have recombined. This has resulted in the chloroplast and cytosolic kinases being more similar to each other than would be expected if the chloroplast enzyme had evolved directly from that of a prokaryotic progenitor.

+ Present addresses: Sainsbury Laboratory, John Innes Institute, Colney Lane, Norwich NR4 7UH, UK

§ Present addresses: Department of Biology, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK


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