[Site-specific endonuclease CauB31 from Chloroflexus aurantiacus B3]
- PMID: 2823833
[Site-specific endonuclease CauB31 from Chloroflexus aurantiacus B3]
Abstract
A sequence-specific endonuclease CauB3I has been isolated from cell extracts of Chloroflexus aurantiacus and partially purified by chromatography on heparin-sepharose; the yield was 3000 units per 1 g of cells. The final preparation is free of non-specific nucleases. It is shown that endonuclease CauB3I recognizes 5' T decreases CCGGA 3' sequence in double-stranded DNA and cleaves it as shown by an arrow. Methylation of adenine in the recognition sequence makes it resistant to CauB3I.
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