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Expression, Characterisation and Homology Modelling of a Novel Hormone-Sensitive Lipase (HSL)-Like Esterase from Glaciozyma antarctica
- Source :
- Catalysts, Vol 10, Iss 1, p 58 (2020), Catalysts, Volume 10, Issue 1
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Microorganisms, especially those that survive in extremely cold places such as Antarctica, have gained research attention since they produce a unique feature of the protein, such as being able to withstand at extreme temperature, salinity, and pressure, that make them desired for biotechnological application. Here, we report the first hormone-sensitive lipase (HSL)-like esterase from a Glaciozyma species, a psychrophilic yeast designated as GlaEst12-like esterase. In this study, the putative lipolytic enzyme was cloned, expressed in E. coli, purified, and characterised for its biochemical properties. Protein sequences analysis showed that GlaEst12 shared about 30% sequence identity with chain A of the bacterial hormone-sensitive lipase of E40. It belongs to the H group since it has the conserved motifs of Histidine-Glycine-Glycine-Glycine (HGGG)and Glycine-Aspartate-Serine-Alanine-Glycine (GDSAG) at the amino acid sequences. The recombinant GlaEst12 was successfully purified via one-step Ni-Sepharose affinity chromatography. Interestingly, GlaEst12 showed unusual properties with other enzymes from psychrophilic origin since it showed an optimal temperature ranged between 50&ndash<br />60 &deg<br />C and was stable at alkaline pH conditions. Unlike other HSL-like esterase, this esterase showed higher activity towards medium-chain ester substrates rather than shorter chain ester. The 3D structure of GlaEst12, predicted by homology modelling using Robetta software, showed a secondary structure composed of mainly &alpha<br />/&beta<br />hydrolase fold, with the catalytic residues being found at Ser232, Glu341, and His371.
- Subjects :
- 0106 biological sciences
psychrophilic yeast
lcsh:Chemical technology
01 natural sciences
Esterase
Catalysis
lcsh:Chemistry
03 medical and health sciences
Affinity chromatography
010608 biotechnology
Hydrolase
lcsh:TP1-1185
Physical and Theoretical Chemistry
Lipase
Psychrophile
030304 developmental biology
glaciozyma antarctica
chemistry.chemical_classification
0303 health sciences
biology
Chemistry
antarctica and homology modelling
Yeast
Amino acid
Glaciozyma antarctica
Enzyme
hormone-sensitive lipase
lcsh:QD1-999
Biochemistry
biology.protein
Subjects
Details
- ISSN :
- 20734344
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Catalysts
- Accession number :
- edsair.doi.dedup.....cda9780aee063527166024e8829e274f