Restriction Endonucleases that Bridge and Excise Two Recognition Sites from DNA
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چکیده
منابع مشابه
Restriction Endonucleases that Bridge and Excise Two Recognition Sites from DNA
Most restriction endonucleases bridge two target sites before cleaving DNA: examples include all of the translocating Type I and Type III systems, and many Type II nucleases acting at their sites. A subset of Type II enzymes, the IIB systems, recognise bipartite sequences, like Type I sites, but cut specified phosphodiester bonds near their sites, like Type IIS enzymes. However, they make two d...
متن کاملDiversity of type II restriction endonucleases that require two DNA recognition sites.
Orthodox Type IIP restriction endonucleases, which are commonly used in molecular biological work, recognize a single palindromic DNA recognition sequence and cleave within or near this sequence. Several new studies have reported on structural and biochemical peculiarities of restriction endonucleases that differ from the orthodox in that they require two copies of a particular DNA recognition ...
متن کاملMany type IIs restriction endonucleases interact with two recognition sites before cleaving DNA.
Type IIs restriction endonucleases recognize asymmetric DNA sequences and cleave both DNA strands at fixed positions, typically several base pairs away from the recognition site. These enzymes are generally monomers that transiently associate to form dimers to cleave both strands. Their reactions could involve bridging interactions between two copies of their recognition sequence. To examine th...
متن کاملTwo new restriction endonucleases from Proteus vulgaris.
Two novel sequence-specific endonucleases have been isolated from Proteus vulgaris, ATCC 13315. PvuI recognizes the sequence: 5' C G A T decrease C G 3' 3' G C increase T A G C 5' and PvuII recognizes the sequence: 5' C A G decrease C T G 3' 3' G T C increase G A C 5' and cleave as indicated by the arrow (decrease). PvuI is an isoschizomer of XorII, RshI, and XniI. No enzyme with the specificit...
متن کاملTwo unique restriction endonucleases from Neisseria lactamica.
Two new site-specific endonucleases, N1a III and N1a IV, have been isolated from Neisseria lactamica. N1a III recognizes the sequence, CATG, and cleaves 3' of the sequence to produce a four base 3' extension. N1a IV recognizes the sequence, GGNNCC, and cleaves between the two N's to produce blunt ended fragments.
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ژورنال
عنوان ژورنال: Journal of Molecular Biology
سال: 2007
ISSN: 0022-2836
DOI: 10.1016/j.jmb.2006.12.070