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Publication Abstract from PubMed

The present work describes the functional and structural characterization of adenine phosphoribosyltransferase 2 from Thermus thermophilus HB8 (TtAPRT2). The combination of structural and substrate specificity data provided valuable information for immobilization studies. Dimeric TtAPRT2 was immobilized onto glutaraldehyde-activated MagReSyn(R)Amine magnetic iron oxide porous microparticles by two different strategies: a) an enzyme immobilization at pH 8.5 to encourage the immobilization process by N-termini (MTtAPRT2A, MTtAPRT2B, MTtAPRT2C) or b) an enzyme immobilization at pH 10.0 to encourage the immobilization process through surface exposed lysine residues (MTtAPRT2D, MTtAPRT2E, MTtAPRT2F). According to catalyst load experiments, MTtAPRT2B (activity: 480IUg(-1)biocatalyst, activity recovery: 52%) and MTtAPRT2F (activity: 507IUg(-1)biocatalyst, activity recovery: 44%) were chosen as optimal derivatives. The biochemical characterization studies demonstrated that immobilization process improved the thermostability of TtAPRT2. Moreover, the potential reusability of MTtAPRT2B and MTtAPRT2F was also tested. Finally, MTtAPRT2F was employed in the synthesis of nucleoside-5'-monophosphate analogues.

Structural and functional characterization of thermostable biocatalysts for the synthesis of 6-aminopurine nucleoside-5'-monophospate analogues.,Arco JD, Perez E, Naitow H, Matsuura Y, Kunishima N, Fernandez-Lucas J Bioresour Technol. 2019 Mar;276:244-252. doi: 10.1016/j.biortech.2018.12.120., Epub 2019 Jan 3. PMID:30640018^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.