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Galluccio M, Mazza T, Scalise M, Tripicchio M, Scarpelli M, Tolomeo M, Pochini L, Indiveri C. Over-Production of the Human SLC7A10 in E. coli and Functional Assay in Proteoliposomes. Int J Mol Sci 2023; 25:536. [PMID: 38203703 PMCID: PMC10779382 DOI: 10.3390/ijms25010536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/28/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
The human SLC7A10 transporter, also known as ASC-1, catalyzes the transport of some neutral amino acids. It is expressed in astrocytes, neurons, and adipose tissues, playing roles in learning, memory processes, and lipid metabolism, thus being involved in neurological and metabolic pathologies. Structure/function studies on this transporter are still in their infancy. In this study, we present a methodology for producing the recombinant human transporter in E. coli. Its transport function was assayed in proteoliposomes following the uptake of radiolabeled L-serine. After the testing of several growth conditions, the hASC-1 transporter was successfully expressed in BL21(DE3) codon plus RIL in the presence of 0.5% glucose and induced with 0.05 mM IPTG. After solubilization with C12E8 and cholesteryl hemisuccinate and purification by Ni-chelating chromatography, hASC-1 was reconstituted in proteoliposomes. In this experimental system it was able to catalyze an Na+-independent homologous antiport of L-serine. A Km for L-serine transport of 0.24 mM was measured. The experimental model developed in this work represents a reproducible system for the transport assay of hASC-1 in the absence of interferences. This tool will be useful to unveil unknown transport properties of hASC-1 and for testing ligands with possible application in human pharmacology.
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Affiliation(s)
- Michele Galluccio
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
| | - Tiziano Mazza
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
| | - Mariafrancesca Scalise
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
| | - Martina Tripicchio
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
| | - Martina Scarpelli
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
| | - Maria Tolomeo
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
| | - Lorena Pochini
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
- National Research Council (CNR), Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), Via Amendola 122/O, 70126 Bari, Italy
| | - Cesare Indiveri
- Laboratory of Biochemistry, Molecular Biotechnology, and Molecular Biology, Department DiBEST (Biologia, Ecologia e Scienze della Terra), University of Calabria, Via Bucci 4C, 6C, 87036 Arcavacata di Rende, Italy; (T.M.); (M.S.); (M.T.); (M.S.); (M.T.); (L.P.)
- National Research Council (CNR), Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), Via Amendola 122/O, 70126 Bari, Italy
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