Naslov
Lyophilization conditions for the stabilization of halohydrin dehalogenases

Autori
Marin, Petra ; Vadlja, Denis ; Milčić, Nevena ; Findrik Blažević, Zvjezdana ; Majerić Elenkov, Maja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
27HSKIKI : book of abstracts / Marković, Dean ; Meštrović, Ernest ; Namjesnik, Danijel ; Tomašić, Vesna - Zagreb : Hrvatsko kemijsko društvo, 2021, 313-313

Skup
27. hrvatski skup kemičara i kemijskih inženjera (27HSKIKI)

Mjesto i datum
Veli Lošinj, Hrvatska, 05.10.2021. - 08.10.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
halohydrin dehalogenase ; enzyme stability ; lyophilization

Sažetak
Halohydrin dehalogenases (HHDHs) catalyse enantioselective formation and conversion of epoxides. Their exceptional selectivity, regioselectivity, and ability to employ different nucleophiles make the enzymes attractive for biocatalysis.[1] The enzyme from Agrobacterium radiobacter AD1 (HheC) is usually expressed in E.coli, isolated in TEMG buffer (50 mM Tris-SO4, 10 mM EDTA, 10 % glycerol, and 1 mM mercaptoethanol), and usually is stored as a cell- free extract at -70 °C for at least three months without significant loss of activity.[2] Both storage (before use) and operational stability (during use) are highly relevant for biotechnological applications.[3] Lyophilization is an attractive approach for the longterm storage of enzymes at ambient temperature. It also facilitates the use of enzymes in non-aqueous media.[4] In this work, the storage stability of HheC isolated in TEMG and TEM buffer is evaluated at room temperature. With a focus on establishing the optimal lyophilized formulation, different additives were tested for enzyme stabilization during lyophilization. Optimal conditions for the lyophilization of several HHDHs have been investigated. Lyophilized HheC was incubated at 50 °C to intensify the differences induced by additives. Enzyme activity is determined by following the absorbance at 310 nm (Figure 1).

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA