A small and compact genome in the marine cyanobacterium Prochlorococcus marinus CCMP 1375:: lack of an intron in the gene for tRNA(Leu)UAA and a single copy of the rRNA operon

被引：25

作者：

Strehl, B

Holtzendorff, J

Partensky, F

Hess, WR

机构：

[1] Humboldt Univ, Dept Biol, D-10115 Berlin, Germany

[2] INSU, CNRS, Biol Stn, F-29682 Roscoff, France

[3] Univ Paris 06, F-29682 Roscoff, France

来源：

FEMS MICROBIOLOGY LETTERS | 1999年 / 181卷 / 02期

关键词：

genome analysis; pulsed field gel electrophoresis; picophytoplankton;

D O I：

10.1111/j.1574-6968.1999.tb08853.x

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Data obtained by pulsed field gel electrophoresis revealed for Prochlorococcus marinus CCMP 1375 a genome size of 1.81 +/- 0.04 Mbp. This value is significantly smaller than for all other cyanobacteria investigated so far. The absence of an intron in the gene for tRNA(Leu)(UAA), which otherwise is widespread among cyanobacteria, and the additional finding that the ribosomal operon exists as a single copy suggest that the deletion of non-essential sequences played a major role in the evolution of P. marinus. A small genome may have been advantageous in the adaptation to very oligotrophic marine conditions. (C) 1999 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

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页码：261 / 266

页数：6

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