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Comparative Study
. 1995 Mar;27(5):1031-5.
doi: 10.1007/BF00037029.

Chlamydomonas transcripts encoding three divergent plastid chaperonins are heat-inducible

M D Thompson  1 , C D Paavola, T R Lenvik, J S Gantt
Affiliations
Comparative Study

Chlamydomonas transcripts encoding three divergent plastid chaperonins are heat-inducible

M D Thompson et al. Plant Mol Biol. 1995 Mar.

Abstract

Three cDNAs encoding plastid cpn60 chaperonin subunits have been isolated from the unicellular green alga Chlamydomonas reinhardtii. Based on comparisons of the predicted amino acid sequences, we conclude that Chlamydomonas, like higher plants, contains divergent plastid cpn60-alpha and cpn60-beta subunits. The predicted amino acid sequences of the two Chlamydomonas cpn60-beta subunits differ significantly (24% divergent), indicating that the two cpn60-beta subunits have been selectively maintained for a considerable period of time. Unlike plastid chaperonin transcripts in higher plants, heat shock conditions (42 degrees C) lead to a rapid increase (10- to 30-fold) in the level of each of the three plastid transcripts.

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