Abstract：
:5'-adenylic acid deaminase (AMP deaminase), an important enzyme for the food industry, can catalyze the irreversible hydrolysis of adenosine monophosphate (AMP) to inosine monophosphate (IMP) and ammonia. In this study, a new strain was screened that efficiently produces 3191.6U/g of AMP deaminase at 32°C. After purification, the optimal temperature and pH of the AMP deaminase were found to be 40°C and 6.0, respectively, but it was partially inhibited by Fe(3+), Cu(2+), Al(3+), and Zn(2+). With amplification of the AMP deaminase production system, 6mL of crude enzyme could produce 2.00mg/g of IMP from 2.04mg/g of dried yeast with an 84.8% molar yield after 40min. These results provide a new insight into AMP deaminase production and offer a potential platform for producing 5'-IMP.
journal_name
Food Chemjournal_title
Food chemistryauthors
Li S,Chen L,Hu Y,Fang G,Zhao M,Guo Y,Pang Zdoi
10.1016/j.foodchem.2016.07.171subject
Has Abstractpub_date
2017-02-01 00:00:00pages
275-81eissn
0308-8146issn
1873-7072pii
S0308-8146(16)31204-3journal_volume
216pub_type
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