8SLJ
K164A mutant of a chlorogenic acid esterase from Lactobacillus helveticus
Summary for 8SLJ
| Entry DOI | 10.2210/pdb8slj/pdb |
| Related | 8SKM |
| Descriptor | Alpha/beta hydrolase (2 entities in total) |
| Functional Keywords | chlorogenic acid, esterase, ferulic acid esterase, insertion domain, hydrolase |
| Biological source | Lactobacillus helveticus |
| Total number of polymer chains | 3 |
| Total formula weight | 83467.10 |
| Authors | |
| Primary citation | Omori, K.K.,Drucker, C.T.,Okumura, T.L.S.,Carl, N.B.,Dinn, B.T.,Ly, D.,Sacapano, K.N.,Tajii, A.,Owens, C.P. The structure of a Lactobacillus helveticus chlorogenic acid esterase and the dynamics of its insertion domain provide insights into substrate binding. Febs Lett., 597:2946-2962, 2023 Cited by PubMed Abstract: Chlorogenic acid esterases (ChlEs) are a useful class of enzymes that hydrolyze chlorogenic acid (CGA) into caffeic and quinic acids. ChlEs can break down CGA in foods to improve their sensory properties and release caffeic acid in the digestive system to improve the absorption of bioactive compounds. This work presents the structure, molecular dynamics, and biochemical characterization of a ChlE from Lactobacillus helveticus (Lh). Molecular dynamics simulations suggest that substrate access to the active site of LhChlE is modulated by two hairpin loops above the active site. Docking simulations and mutational analysis suggest that two residues within the loops, Gln and Lys , are important for CGA binding. Lys provides a slight substrate preference for CGA, whereas Gln is required for efficient turnover. This work is the first to examine the dynamics of a bacterial ChlE and provides insights on substrate binding preference and turnover in this type of enzyme. PubMed: 37698360DOI: 10.1002/1873-3468.14731 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.101 Å) |
Structure validation
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