Comparison of the homologous SfeI and LlaBI restriction-modification systems

被引：0

作者：

Okhapkina, SS ^{[1
]}

Netesova, NA

Golikova, LN

Seregina, EV

Sosnovtsev, SV

Abdurashitov, MA

Degtyarev, SK

机构：

[1] Vektor State Res Ctr Virol & Biotechnol, Inst Mol Biol, Koltsov 633159, Novosibirsk, Russia

[2] Russian Acad Med Sci, Siberian Div, Inst Mol Biol & Biophys, Novosibirsk 630117, Russia

来源：

MOLECULAR BIOLOGY | 2002年 / 36卷 / 03期

关键词：

Streptococcus faecalis; restriction-modification system; gene cloning; an-Lino acid sequence alignment; horizontal transfer;

D O I：

10.1023/A:1016094926458

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A fragment containing the SfeI restriction-modification system (RMS) operon was cloned from a Streptococcus faecalis SE72 plasmid. Nucleotide sequence analysis revealed its high (99.2%) homology to the operon for Lactococcus lactis subsp. cremoris W56 LlaBI RMS recognizing the same site, 5'-CTRYAG-3'. A substantial difference was that SfeI RMS operon had an additional 198-bp segment in the methylase gene and a larger gene for the putative control protein. No homology was observed between operon-flanking sequences of the two closely related species, suggesting horizontal transfer of the operon.

引用

页码：333 / 337

页数：5

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