An extracellullar nuclease from Bacillus firmus VKPACU-1: specificity and mode of action.
An extracellular nuclease from Bacillus firmus VKPACU-1 was multifunctional enzyme, this nuclease hydrolyzed poly U rapidly and more preferentially than the other homopolyribonucleotides. Hydrolysis of RNA this enzyme released mononucleotides in the order 5'UMP > 5'AMP > 5'GMP where as in hydrolysis of DNA the mononucleotides in the order of 5'dAMP > 5'dGMP > 5'dTMP and oligonucleotides. Uridylic linkages in RNA and adenylic linkages in DNA were preferentially cleaved by the nuclease. Nuclease produced oligonucleotides having only 3' hydroxyl and 5' phosphate termini. Present nuclease hydrolyzed RNA and DNA released oligonucleotides as major end products and mononucleotides, suggesting an endo mode of action.
Centre for Advanced Studies in Botany, University of Madras, Chennai, India.
Periasamy
P
Ashok Kumar
Vijayaraghavan
V
Kannan
D001407:Bacillus / Q000201:enzymology*; D002851:Chromatography, High Pressure Liquid; D004247:DNA / Q000378:metabolism; D003851:Deoxyribonucleases / Q000737:chemistry / Q000302:isolation & purification; D004720:Endonucleases / Q000737:chemistry*; D006868:Hydrolysis; D009841:Oligonucleotides / Q000096:biosynthesis*; D011072:Poly U / Q000378:metabolism; D012329:RNA, Bacterial / Q000378:metabolism; D012260:Ribonucleases / Q000737:chemistry / Q000302:isolation & purification; D013379:Substrate Specificity
D009841:Oligonucleotides; D012329:RNA, Bacterial; D011072:Poly U; D004247:DNA; D003851:Deoxyribonucleases; D004720:Endonucleases; D012260:Ribonucleases