ISSN:
1617-4623
Keywords:
Key words Minicircle
;
Dinoflagellate
;
Plastid DNA
;
Codon bias
;
Endosymbiosis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Plastid DNA was purified from the dinoflagellate Amphidinium operculatum. The genes atpB, petD, psaA, psbA and psbB have been shown to reside on single-gene minicircles of a uniform size of 2.3–2.4 kb. The psaA and psbB genes lack conventional initiation codons in the expected positions, and may use GTA for translation initiation. There are marked biases in codon preference. The predicted PsbA protein lacks the C-terminal extension which is present in all other photosynthetic organisms except Euglena gracilis, and there are other anomalies elsewhere in the predicted amino acid sequences. The non-coding regions of the minicircles contain a “core” region which includes a number of stretches that are highly conserved across all minicircles and modular regions that are conserved within subsets of the minicircles.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004380050042
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