The psbA-gene from a red alga resembles those from Cyanobacteria and Cyanelles


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kvalentin [ at ] awi-bremerhaven.de

Abstract

Plastid DNA (ptDNA) from the unicellular red alga Cyanidium caldarium was isolated. A 5.8 kb Eco RI, fragment containing the entire psbA-gene was cloned and the nucleotide sequence of the psbA-gene determined. At the carboxyl terminus the encoded protein (D1) contains the seven amino acid-insertion which was found to be typical of the cyanobacteria and the cyanelles of Cyanophora paradoxa. However, the overall sequence homology does not support a direct relationship between the plastids of Cyanidium, cyanelles and the cyanobacteria. As in other photosynthetic organisms the psbA-gene is transcribed as a monocistronic mRNA. The ribosomal RNA operon was located 4 kb upstream of the psbA-gene.



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Eprint ID
5640
DOI https://www.doi.org/10.1007/bf00312617

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Maid, U. , Valentin, K. and Zetsche, K. (1990): The psbA-gene from a red alga resembles those from Cyanobacteria and Cyanelles , Current Genetics, 17 (3), pp. 255-259 . doi: https://www.doi.org/10.1007/bf00312617


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