[Restriction endonuclease Asi256I recognizing the nucleotide sequence 5'-GATC-3']

Area of Science:

• Microbiology
• Molecular Biology
• Enzymology

Context:

• Isolation and characterization of novel restriction enzymes are crucial for advancing molecular biology techniques.
• Soil microbial communities are a rich source of unique enzymes with potential biotechnological applications.

Purpose:

• To isolate and characterize a novel restriction endonuclease from Arthrobacter sp. strain Ck256.
• To determine the optimal conditions for the enzyme's activity.
• To evaluate its potential applications in low-temperature molecular biology.

Summary:

• Arthrobacter sp. strain Ck256 was isolated from soil, producing a restriction endonuclease named Asi256I.
• The enzyme Asi256I was purified, and its optimal activity was determined to be at 6°C.
• Asi256I was identified as a true isoschizomer of the MboI restriction enzyme.

Impact:

• Provides a new tool for restriction digestion at low temperatures, enabling sensitive molecular and genetic engineering applications.
• Expands the repertoire of available restriction enzymes for specialized research.
• Facilitates research in fields requiring preservation of sample integrity at reduced temperatures.