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DNase I Structure: DNase I is a glycoprotein with a molecular weight of 30,000 Da and a carbohydrate chain of 8-10 residues attached to Asn18 (orange). [3] It is an 𝛼,𝛽-protein with two 6-stranded 𝛽-pleated sheets which form the core of the structure. [ 4 ]
Deoxyribonuclease I (usually called DNase I), is an endonuclease of the DNase family coded by the human gene DNASE1. [5] DNase I is a nuclease that cleaves DNA preferentially at phosphodiester linkages adjacent to a pyrimidine nucleotide, yielding 5'-phosphate-terminated polynucleotides with a free hydroxyl group on position 3', on average producing tetranucleotides.
The enzyme complex is composed of three different subunits called RecB, RecC, and RecD and hence the complex is named RecBCD (Figure 1). Before the discovery of the recD gene, [4] the enzyme was known as “RecBC.”
Deoxyribonuclease II (EC 3.1.22.1, DNase II, pancreatic DNase II, deoxyribonucleate 3'-nucleotidohydrolase, pancreatic DNase II, acid deoxyribonuclease, acid DNase) is an endonuclease that hydrolyzes phosphodiester linkages of deoxyribonucleotide in native and denatured DNA, yielding products with 3'-phosphates and 5'-hydroxyl ends, which occurs as a result of single-strand cleaving mechanism. [1]
Deoxyribonuclease IV (phage-T4-induced) (EC 3.1.21.2, endodeoxyribonuclease IV (phage T4-induced), E. coli endonuclease IV, endodeoxyribonuclease, redoxyendonuclease, deoxriboendonuclease, Escherichia coli endonuclease II, endonuclease II, DNA-adenine-transferase) is catalyzes the degradation nucleotides [1] in DsDNA by attacking the 5'-terminal end.
A DNase footprinting assay [1] is a DNA footprinting technique from molecular biology/biochemistry that detects DNA-protein interaction using the fact that a protein bound to DNA will often protect that DNA from enzymatic cleavage. This makes it possible to locate a protein binding site on a particular DNA molecule.
DNase I and DNase1L1 (DNaseX) carry out programmed cell death (apoptosis) and thus protect the human body from the development of tumor cells. Conversely, the absence of DNase enzyme activity leads to the increased formation of tumor cells, as the execution of apoptosis is prevented.
Food and biological process engineering is a discipline concerned with applying principles of engineering to the fields of food production and distribution and biology. It is a broad field, with workers fulfilling a variety of roles ranging from design of food processing equipment to genetic modification of organisms.