Identification of lipases with activity towards monoacylglycerol by criterion of conserved cap architectures

Riegler-Berket, Lina; Leitmeier, Andrea; Aschauer, Philipp; Dreveny, Ingrid; Oberer, Monika

Abstract

Monoacylglycerol lipases (MGL) are a subclass of lipases that predominantly hydrolyze monoacylglycerol (MG) into glycerol and fatty acid. MGLs are ubiquitous enzymes across species and play a role in lipid metabolism, affecting energy homeostasis and signaling processes. Structurally, MGLs belong to the ?/? hydrolase fold family with a cap covering the substrate binding pocket. Analysis of the known 3D structures of human, yeast and bacterial MGLs revealed striking similarity of the cap architecture. Since MGLs from different organisms share very low sequence similarity, it is difficult to identify MGLs based on the amino acid sequence alone. Here, we investigated whether the cap architecture could be a characteristic feature of this subclass of lipases with activity towards MG and whether it is possible to identify MGLs based on the cap shape. Through database searches, we identified the structures of five different candidate ?/? hydrolase fold proteins with unknown or reported esterase activity. These proteins exhibit cap architecture similarities to known human, yeast and bacterial MGL structures. Out of these candidates we confirmed MGL activity for the protein LipS, which displayed the highest structural similarity to known MGLs. Two further enzymes, Avi_0199 and VC1974, displayed low level MGL activities. These findings corroborate our hypothesis that this conserved cap architecture can be used as criterion to identify lipases with activity towards MGs.

Citation

Riegler-Berket, L., Leitmeier, A., Aschauer, P., Dreveny, I., & Oberer, M. (in press). Identification of lipases with activity towards monoacylglycerol by criterion of conserved cap architectures. Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids, 1863(7),

• Journal Article Type: Article
• Acceptance Date: Mar 27, 2018
• Online Publication Date: Apr 5, 2018
• Deposit Date: Apr 17, 2018
• Publicly Available Date: Apr 6, 2019
• Journal: BBA - Biochimica et Biophysica Acta
• Print ISSN: 1388-1981
• Electronic ISSN: 0006-3002
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 1863
• Issue: 7
• Keywords: Monoacylglycerol lipase; Monoglyceride lipase; Lipase cap; Conserved cap architecture; Lipase lid; Enzyme kinetics
• Public URL: https://nottingham-repository.worktribe.com/output/923759
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1388198118300507?via%3Dihub