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SbvI restriction endonuclease from Streptococcus bovis
I Vanat1, P Pristas, E Kutejov a
1Institute of Animal Physiology, Slovak Academy of Sciences, Kosice.
Letters in Applied Microbiology
|December 1, 1993
Summary
Restriction endonuclease SbvI, an isoschizomer of HaeIII, was isolated from Streptococcus bovis II/1. This enzyme recognizes and cleaves the 5'-GGCC-3' DNA sequence, producing blunt ends.
Area of Science:
- Molecular Biology
- Enzymology
- Microbiology
Background:
- Restriction enzymes are crucial tools in molecular biology for DNA manipulation.
- Streptococcus bovis II/1 is an amylolytic bacterium found in the rumen.
- Isoschizomers are enzymes that recognize and cleave the same DNA sequence.
Purpose of the Study:
- To isolate and characterize a novel restriction endonuclease from Streptococcus bovis II/1.
- To determine the recognition sequence and cleavage site of the isolated enzyme, SbvI.
- To compare SbvI with its known isoschizomer, HaeIII.
Main Methods:
- Isolation and purification of SbvI using phosphocellulose and heparin-Sepharose chromatography.
- DNA digestion experiments using plasmid pBR322, pUC9, and lambda-DNA.
- Analysis of DNA cleavage patterns and comparison with computer-derived data.
Main Results:
- Restriction endonuclease SbvI was successfully isolated and purified.
- SbvI recognizes the 4-base pair palindrome sequence 5 ac-3 '.
- The enzyme cleaves DNA after the second guanine base, generating blunt ends.
Conclusions:
- SbvI is a novel restriction endonuclease from Streptococcus bovis II/1, acting as an isoschizomer of HaeIII.
- The characterization of SbvI expands the repertoire of available restriction enzymes for molecular biology applications.
- Understanding SbvI's properties aids in precise DNA manipulation and genetic engineering techniques.