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PfoI, a unique type II restriction endonuclease that recognises the sequence 5'-T downward arrow CCNGGA-3'
M Gaigalas1, Z Maneliene, R Kazlauskiene
1Institute of Biotechnology and. Fermentas UAB, Graiciūno 8, 2028 Vilnius, Lithuania.
Nucleic Acids Research
|October 5, 2002
Abstract:
A new type II restriction endonuclease designated PfoI has been partially purified from Pseudomonas fluorescens biovar 126. PfoI recognises the interrupted hexanucleotide palindromic sequence 5'-T downward arrow CCNGGA-3' and cleaves DNA to produce protruding pentanucleotide 5'-ends.
Insights
Researchers purified a novel enzyme, PfoI, from Pseudomonas fluorescens. This type II restriction endonuclease recognizes and cleaves specific DNA sequences, producing unique 5-prime ends.
Area of Science:
- Molecular Biology
- Enzymology
- Genetics
Background:
- Restriction endonucleases are crucial tools in molecular biology for DNA manipulation.
- Understanding novel restriction enzymes expands the toolkit for genetic engineering and research.
Purpose of the Study:
- To identify and characterize a new type II restriction endonuclease from Pseudomonas fluorescens.
- To determine the DNA recognition sequence and cleavage site of the novel enzyme.
Main Methods:
- Partial purification of the restriction endonuclease PfoI from Pseudomonas fluorescens biovar 126.
- DNA cleavage assays to determine the recognition sequence and cleavage pattern.
Main Results:
- A new type II restriction endonuclease, PfoI, was partially purified.
- PfoI recognizes the interrupted hexanucleotide palindromic sequence 5'-T CCNGGA-3'.
- PfoI cleaves DNA at this site, generating protruding 5'-pentanucleotide ends.
Conclusions:
- PfoI is a novel restriction endonuclease with a unique recognition site.
- The enzyme's specific cleavage pattern makes it a potentially valuable tool for molecular biology applications.