Abstract
Nuclease P1 (NP1) can hydrolyze nucleic acids into four 5′-mononucleotides, which are widely used in the pharmaceutical and food industries. In this paper, an aqueous two-phase system (ATPS) was developed to purify NP1 from Penicillium citrinum. Polyethylene glycol (PEG) and nucleotides salts were studied to form ATPSs, among which PEG3000/disodium guanosine monophosphate (GMPNa2) was researched, including the phase composition and pH. Using 14% (w/w) PEG3000 and 20% (w/w) GMPNa2 ATPS at pH 5.0, the best recovery and purification factor, 82.4% and 3.59, were obtained. The recovery of NP1 was 98.3% by the separation of ultrafiltration from the PEG-rich phase. The recycling use of GMPNa2 was also studied, and 95.1% of GMPNa2 in the salt-rich phase was obtained with the addition of ethanol as the solvent. These results showed that the ATPS was effective for purification of NP1.
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The authors thank the financial support by the young investigator grant program of National Natural Science Foundation of China (21606128) and the Jiangsu Synergetic Innovation Center for Advanced Bio-Manufacture (XTE1833).
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Chen, X., Huang, X., Tang, Y. et al. Efficient Purification of Nuclease P1 from Penicillium citrinum Using Polyethylene Glycol/Disodium Guanosine Monophosphate Aqueous Two-Phase System. Appl Biochem Biotechnol 193, 3753–3764 (2021). https://doi.org/10.1007/s12010-021-03637-2
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DOI: https://doi.org/10.1007/s12010-021-03637-2