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Endothelial lipase variant T111I does not alter inhibition by angiopoietin-like proteins
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Abstract
High levels of HDL-C are correlated with a decreased risk of cardiovascular disease. HDL-C levels are modulated in part by the secreted phospholipase, endothelial lipase (EL), which hydrolyzes the phospholipids of HDL and decreases circulating HDL-C concentrations. A 584C/T polymorphism in LIPG , the gene which encodes EL, was first identified in individuals with increased HDL levels. This polymorphism results in a T111I point mutation the EL protein. The association between this variant, HDL levels, and the risk of coronary artery disease (CAD) in humans has been extensively studied, but the findings have been inconsistent. In this study, we took a biochemical approach, investigating how the T111I variant affected EL activity, structure, and stability. Moreover, we tested whether the T111I variant altered the inhibition of phospholipase activity by angiopoietin-like 3 (ANGPTL3) and angiopoietin-like 4 (ANGPTL4), two known EL inhibitors. We found that neither the stability nor enzymatic activity of EL was altered by the T111I variant. Moreover, we found no difference between wild-type and T111I EL in their ability to be inhibited by ANGPTL proteins. These data suggest that any effect this variant may have on HDL-C levels or cardiovascular disease are not mediated through alterations in these functions.
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Metadata
- Authors
- Sylvers-Davie, K. L., Bierstedt, K. C., Schnieders, M. J., & Davies, B. S. J.
- Affiliations
- University of Iowa (US)
- Corresponding author
- Davies, Brandon S. J.
- Venue
- Scientific Reports
- Published
- 2024-02-20
- Volume
- 14
- Issue
- 1
- Pages
- 4246-4246
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC10879187
- OpenAlex
- W4391957770
- Cited by
- 1
- References
- 2
- Citations by year
- 2025: 1
- FWCI
- 0.30
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- PubMed Central (submittedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Institutes of Health (T32DK112751, R01DC012049, R01HL162698)
- National Science Foundation (CHE-1751688)
- Topics
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Paraoxonase enzyme and polymorphisms
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipoproteins and Cardiovascular Health
- Keywords
- endothelial lipase, ANGPTL3, ANGPTL4, phospholipase inhibition, HDL cholesterol, coronary artery disease, protein stability, enzyme activity, genetic polymorphism
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