生物
基因组
古细菌
假基因
遗传学
转座因子
染色体外DNA
氯仿(类)
克莱德
第二组内含子
基因
细菌
蛋白质细菌
系统发育树
16S核糖体RNA
核糖核酸
RNA剪接
作者
Stephen J. Giovannoni,H. James Tripp,Scott A. Givan,Mircea Podar,Kevin L. Vergin,Damon Baptista,Lisa Bibbs,Jonathan Eads,Toby H. Richardson,Michiel Noordewier,Michael S. Rappé,Jay M. Short,James C. Carrington,Eric J. Mathur
出处
期刊:Science
[American Association for the Advancement of Science]
日期:2005-08-18
卷期号:309 (5738): 1242-1245
被引量:1130
标识
DOI:10.1126/science.1114057
摘要
The SAR11 clade consists of very small, heterotrophic marine α-proteobacteria that are found throughout the oceans, where they account for about 25% of all microbial cells. Pelagibacter ubique , the first cultured member of this clade, has the smallest genome and encodes the smallest number of predicted open reading frames known for a free-living microorganism. In contrast to parasitic bacteria and archaea with small genomes, P. ubique has complete biosynthetic pathways for all 20 amino acids and all but a few cofactors. P. ubique has no pseudogenes, introns, transposons, extrachromosomal elements, or inteins; few paralogs; and the shortest intergenic spacers yet observed for any cell.
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