A diversity of uncharacterized reverse transcriptases in bacteria.
A diversity of uncharacterized reverse transcriptases in bacteria.
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DOI:
10.1093/nar/gkn867
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发表时间:
2008-12
影响因子:
14.9
通讯作者:
Zimmerly S
中科院分区:
文献类型:
--
作者:
Simon DM;Zimmerly S
Retroelements are usually considered to be eukaryotic elements because of the large number and variety in eukaryotic genomes. By comparison, reverse transcriptases (RTs) are rare in bacteria, with only three characterized classes: retrons, group II introns and diversity-generating retroelements (DGRs). Here, we present the results of a bioinformatic survey that aims to define the landscape of RTs across eubacterial, archaeal and phage genomes. We identify and categorize 1021 RTs, of which the majority are group II introns (73%). Surprisingly, a plethora of novel RTs are found that do not belong to characterized classes. The RTs have 11 domain architectures and are classified into 20 groupings based on sequence similarity, phylogenetic analyses and open reading frame domain structures. Interestingly, group II introns are the only bacterial RTs to exhibit clear evidence for independent mobility, while five other groups have putative functions in defense against phage infection or promotion of phage infection. These examples suggest that additional beneficial functions will be discovered among uncharacterized RTs. The study lays the groundwork for experimental characterization of these highly diverse sequences and has implications for the evolution of retroelements.
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影响因子:
7.4
作者:
Haberer, G;Young, S;Messing, J
通讯作者:
Messing, J
DOI:
10.1073/pnas.0803860105
发表时间:
2008-09-09
影响因子:
11.1
作者:
Chang, Gue Su;Hong, Yoojin;van Rossum, Damian B.
通讯作者:
van Rossum, Damian B.
DOI:
10.1126/science.1159689
发表时间:
2008-08-15
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Brouns SJ;Jore MM;Lundgren M;Westra ER;Slijkhuis RJ;Snijders AP;Dickman MJ;Makarova KS;Koonin EV;van der Oost J
通讯作者:
van der Oost J
影响因子:
3.2
作者:
HERZER, PJ;INOUYE, S;WHITTAM, TS
通讯作者:
WHITTAM, TS
影响因子:
64.8
作者:
GREIDER, CW;BLACKBURN, EH
通讯作者:
BLACKBURN, EH