INVESTIGADORES
SANCHEZ PUERTA Maria virginia
artículos
Título:
The complete plastid genome sequence of the haptophyte Emiliania huxleyi: a comparison to other plastid genomes
Autor/es:
SÁNCHEZ PUERTA, M. V., T.R. BACHVAROFF & C.F. DELWICHE
Revista:
DNA RESEARCH
Editorial:
OXFORD UNIV PRESS
Referencias:
Año: 2005 vol. 12 p. 151 - 156
ISSN:
1340-2838
Resumen:
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The
complete nucleotide sequence of the plastid genome of the haptophyte Emiliania
huxleyi has been
determined. E. huxleyi is the most abundant coccolithophorid and has a key role in the carbon
cycle. It is also implicated in the production of dimethylsulphide (DMS), which
is involved in cloud nucleation and may affect the global climate. Here, we
report the plastid genome sequence of this ecologically and economically
important species and compare its gene content and arrangement to other known
plastid genomes. The genome is circular and consists of 105,309 bp with two
inverted repeats of 4,841 bp each. In terms of both genome size and gene
content E. huxleyi cpDNA is substantially smaller than any other from the red plastid
lineage. The genetic information is densely packed, with 86.8% of the genome
specifying 110 identified protein-coding genes, 9 open reading frames, 28 different
tRNAs, and 3 rRNAs. A detailed comparison to other plastid genomes, based on
gene content, gene function, and gene cluster analysis is discussed. These
analyses suggest a close relationship of the E. huxleyi cpDNA to the chlorophyll c containing plastids
from heterokonts and cryptophytes, and they support the origin of the
chromophyte plastids from the red algal lineage.
