Ramachandra Atthipalli

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Isolation, purification and properties of new restriction endonucleases from Bacillus badius and Bacillus lentus.

Pannaga Pavan Jutur; Attipalli Ramachandra Reddy (Profiled Author: Ramachandra Atthipalli)

Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India.
Microbiological research 2007;162(4):378-83.

We tentatively named two enzymes as BbaI and BleI, which were isolated and purified from Gram-positive mesophilic bacteria Bacillus badius 1458 and Bacillus lentus 1689 respectively, by ammonium sulphate precipitation, phosphocellulose and heparin-sepharose column chromatography. SDS-PAGE protein profiles for BbaI and BleI showed denatured molecular weights of 52 and 48 kDa, respectively. BbaI hydrolyzed pUC18 DNA into 1900 and 700 bp, pBR322 DNA into two fragments of 2800 and 1500 bp and Phix174 DNA into 3800 and 1600 bp. BleI hydrolyzed pUC18 DNA into 1800 and 800 bp, pBR322 DNA into two fragments of 2700 and 1600 bp and Phix174 DNA into 3700 and 1700 bp. The effects of temperature, ionic strength, pH and Mg2+ ion concentrations were studied to demonstrate some biochemical properties of BbaI and BleI. Maximum activities of these enzymes were observed at 37 degrees C (pH 8.0) with 100 mM NaCl and 10 mM Mg2+ concentrations.

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