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Genetic and Structural Evaluation of Fatty Acid Transport Protein-4 in Relation to Markers of the Insulin Resistance Syndrome
Department of Medicine, Atherosclerosis Research Unit, King Gustaf V Research Institute, S-171 76 Stockholm, Sweden.
Department of Organic Chemistry, University of Padova, 35131 Padova, Italy.
Department of Medicine, Atherosclerosis Research Unit, King Gustaf V Research Institute, S-171 76 Stockholm, Sweden.
Department of Medicine, Atherosclerosis Research Unit, King Gustaf V Research Institute, S-171 76 Stockholm, Sweden.
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2004 (English)In: Journal of Clinical Endocrinology and Metabolism, ISSN 0021-972X, Vol. 89, no 1, 392-399 p.Article in journal (Refereed) Published
Abstract [en]

Disturbances in fatty acid metabolism are involved in the etiology of insulin resistance and the related dyslipidemia, hypertension, and procoagulant state. The fatty acid transport proteins (FATPs) are implicated in facilitated cellular uptake of nonesterified fatty acids (NEFAs), thus potentially regulating NEFA concentrations and metabolism. The aim of this study was to investigate polymorphic loci in the FATP4 gene with respect to associations with fasting and postprandial lipid and lipoprotein variables and markers of insulin resistance in 608 healthy, middle-aged Swedish men and to evaluate possible mechanisms behind any associations observed. Heterozygotes for a Gly209Ser polymorphism (Ser allele frequency 0.05) had significantly lower body mass index and, correcting for body mass index, significantly lower triglyceride concentrations, systolic blood pressure, insulin concentrations, and homeostasis model assessment index compared with common homozygotes. A three-dimensional model of the FATP4 protein based on structural and functional similarity with adenylate-forming enzymes revealed that the variable residue 209 is exposed in a region potentially involved in protein-protein interactions. Furthermore, the model indicated functional regions with respect to NEFA transport and acyl-coenzyme A synthase activity and membrane association. These findings propose FATP4 as a candidate gene for the insulin resistance syndrome and provide a structural basis for understanding FATP function in NEFA transport and metabolism.

Place, publisher, year, edition, pages
2004. Vol. 89, no 1, 392-399 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-45842DOI: 10.1210/jc.2003-030682OAI: oai:DiVA.org:liu-45842DiVA: diva2:266738
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-12

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Sunnerhagen, Maria

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