The word "BstI Deoxyribonuclease" is a mouthful to spell, but using IPA phonetic transcription can make it easier to pronounce. "BstI" is pronounced as "bi: es ti:" with the "i:" sound representing the long vowel "ee." "Deoxyribonuclease" is pronounced as "di:ˌɒksɪˌraɪbəʊˈnjuːkleɪz," with stressed syllables on "deoxy," "ribo," and "nuclease," and the final "z" representing a voiced "s" sound. This word refers to an enzyme used in molecular biology to cleave DNA at specific points in the sequence.
BstI Deoxyribonuclease, also known as BstI, is an enzyme categorized as a type II restriction endonuclease. It is derived from the bacteria Bacillus stearothermophilus and is commonly used in molecular biology research for DNA manipulation purposes. BstI belongs to the restriction enzyme family, which are proteins that can recognize specific DNA sequences and cleave the DNA at or near these target sites.
BstI specifically recognizes and cuts DNA at the sequence 5ʹ GGATCC 3ʹ, producing blunt ends. This means that the enzyme cleaves the DNA strands at the same position within the recognition sequence, resulting in a clean and even cut with no overhanging bases. This specificity and reliability of BstI make it suitable for a wide range of applications, such as restriction mapping, DNA cloning, and genetic engineering.
The enzyme is highly active under optimal conditions of temperature and pH, usually working optimally at 60-65 °C. Additionally, BstI is highly specific, as it only cleaves DNA at the recognition sequence and does not exhibit any significant exonuclease or endonuclease activity at other sites in the DNA molecule.
In summary, BstI Deoxyribonuclease is an enzyme derived from Bacillus stearothermophilus that recognizes the specific DNA sequence 5ʹ GGATCC 3ʹ and cleaves the DNA at that site, producing blunt ends. Its high specificity, activity, and reliability make it valuable for various DNA manipulation techniques in molecular biology research.
The word "BstI Deoxyribonuclease" has its etymology as follows:
1. BstI: The name "BstI" refers to the restriction endonuclease enzyme derived from the bacterium Bacillus stearothermophilus (abbreviated as Bst). The Roman numeral "I" indicates that it was the first enzyme found in the Bst family.
2. Deoxyribonuclease: "Deoxyribonuclease" comes from the combination of two main components:
- Deoxyribo-: Refers to deoxyribonucleic acid (DNA), the genetic material found in living cells.
- -nuclease: Derived from the term "nuclease", which refers to an enzyme that breaks down nucleic acids.