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Korban SA, Bobrov KS, Maynskova MA, Naryzhny SN, Vlasova OL, Eneyskaya EV, Kulminskaya AA. Heterologous expression in Pichia pastoris and biochemical characterization of the unmodified sulfatase from Fusarium proliferatum LE1. Protein Eng Des Sel 2017. [PMID: 28651356 DOI: 10.1093/protein/gzx033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Sulfatases are a family of enzymes (sulfuric ester hydrolases, EC 3.1.6.-) that catalyze the hydrolysis of a wide array of sulfate esters. To date, despite the discovery of many sulfatase genes and the accumulation of data on numerous sulfated molecules, the number of characterized enzymes that are key players in sulfur metabolism remains extremely limited. While mammalian sulfatases are well studied due to their involvement in a wide range of normal and pathological biological processes, lower eukaryotic sulfatases, especially fungal sulfatases, have not been thoroughly investigated at the biochemical and structural level. In this paper, we describe the molecular cloning of Fusarium proliferatum sulfatase (F.p.Sulf-6His), its recombinant expression in Pichia pastoris as a soluble and active cytosolic enzyme and its detailed characterization. Gel filtration and native electrophoretic experiments showed that this recombinant enzyme exists as a tetramer in solution. The enzyme is thermo-sensitive, with an optimal temperature of 25°C. The optimal pH value for the hydrolysis of sulfate esters and stability of the enzyme was 6.0. Despite the absence of the post-translational modification of cysteine into Cα-formylglycine, the recombinant F.p.Sulf-6His has remarkably stable catalytic activity against p-nitrophenol sulfate, with kcat = 0.28 s-1 and Km = 2.45 mM, which indicates potential use in the desulfating processes. The currently proposed enzymatic mechanisms of sulfate ester hydrolysis do not explain the appearance of catalytic activity for the unmodified enzyme. According to the available models, the unmodified enzyme is not able to perform multiple catalytic acts; therefore, the enzymatic mechanism of sulfate esters hydrolysis remains to be fully elucidated.
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Affiliation(s)
- Svetlana A Korban
- Laboratory of Enzymology, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center "Kurchatov Institute", PNPI, 1, Orlova roscha mcr., Gatchina, Leningrad Region 188300, Russia.,Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Chlopina str. 11, 195251 St. Petersburg, Russia
| | - Kirill S Bobrov
- Laboratory of Enzymology, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center "Kurchatov Institute", PNPI, 1, Orlova roscha mcr., Gatchina, Leningrad Region 188300, Russia
| | - Maria A Maynskova
- Orekhovich Institute of Biomedical Chemistry of Russian Academy of Medical Sciences, Pogodinskaya 10, Moscow 119121, Russia
| | - Stanislav N Naryzhny
- Laboratory of Enzymology, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center "Kurchatov Institute", PNPI, 1, Orlova roscha mcr., Gatchina, Leningrad Region 188300, Russia.,Orekhovich Institute of Biomedical Chemistry of Russian Academy of Medical Sciences, Pogodinskaya 10, Moscow 119121, Russia
| | - Olga L Vlasova
- Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Chlopina str. 11, 195251 St. Petersburg, Russia
| | - Elena V Eneyskaya
- Laboratory of Enzymology, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center "Kurchatov Institute", PNPI, 1, Orlova roscha mcr., Gatchina, Leningrad Region 188300, Russia
| | - Anna A Kulminskaya
- Laboratory of Enzymology, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center "Kurchatov Institute", PNPI, 1, Orlova roscha mcr., Gatchina, Leningrad Region 188300, Russia.,Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Chlopina str. 11, 195251 St. Petersburg, Russia
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