Copper-containing oxidase that catalyzes both the o-hydroxylation of monophenols and the subsequent oxidation of the resulting o-diphenols into reactive o-quinones, which evolve spontaneously to produce intermediates, which associate in dark brown pigments. Involved in the initial step of melanin synthesis. Melanins constitute a mechanism of defense and resistance to stress such as UV radiations, free radicals, gamma rays, dehydratation and extreme temperatures, and contribute to the fungal cell-wall resistance against hydrolytic enzymes in avoiding cellular lysis. Fungal pigments are also involved in the formation and stability of spores. Source: Recombinant protein corresponding to aa1-378 from Agaricus bisporus Polyphenol oxidase 2, fused to 10X His-Tag at N-terminal and Myc-Tag at C-terminal, expressed in E.coli. Molecular Weight: ~51.0kD Amino Acid Sequence: MSLIATVGPTGGVKNRLNIVDFVKNEKFFTLYVRSLELLQAKEQHDYSSFFQLAGIHGLPFTEWAKERPSMNLYKAGYCTHGQVLFPTWHRTYLSVLEQILQGAAIEVAKKFTSNQTDWVQAAQDLRQPYWDWGFELMPPDEVIKNEEVNITNYDGKKISVKNPILRYHFHPIDPSFKPYGDFATWRTTVRNPDRNRREDIPGLIKKMRLEEGQIREKTYNMLKFNDAWERFSNHGISDDQHANSLESVHDDIHVMVGYGKIEGHMDHPFFAAFDPIFWLHHTNVDRLLSLWKAINPDVWVTSGRNRDGTMGIAPNAQINSETPLEPFYQSGDKVWTSASLADTARLGYSYPDFDKLVGGTKELIRDAIDDLIDERYG Storage and Stability: Lyophilized and reconstituted products are stable for 6 months after receipt at -20C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Supplied as a lyophilized powder from 20mM Tris-HCl, 0.5M sodium chloride, pH 8.0, 6% trehalose. Reconstitute with sterile ddH2O to a concentration of 0.1-1mg/ml.
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