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Evolutionary analysis of the plastid-encoded gene for the α subunit of the DNA-dependent RNA polymerase ofPyrenomonas salina(cryptophyceae)

✍ Scribed by M. Maerz; S. Rensing; G. L. Igloi; U.-G. Maier

Publisher
Springer-Verlag
Year
1992
Tongue
English
Weight
372 KB
Volume
22
Category
Article
ISSN
0172-8083

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✦ Synopsis

The nucleotide sequence of the gene coding for the plastid-encoded alpha subunit of DNA-dependent RNA polymerase from the cryptomonad alga Pyrenomonas salina was determined. The deduced amino-acid sequence, corresponding to a 35.2 kDa polypeptide, was compared to homologues from other organisms. Evolutionary relationships were analyzed in detail by the parsimony method together with bootstrap analysis. The deduced phylogenetic tree shows that the cryptomonad gene is the most ancient type of known plastid-encoded RNA polymerase.

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