Role of regulatory F-domain in hepatocyte nuclear factor-4alpha ligand specificity.

Abstract excerpt

The F-domain of rat HNF-4alpha1 has a crucial impact on the ligand binding affinity, ligand specificity and secondary structure of HNF-4alpha. (i) Fluorescent binding assays indicate that wild-type, full-length HNF-4alpha (amino acids 1-455) has high affinity (Kd=0.06-12 nm) for long chain fatty acyl-CoAs (LCFA-CoA) and low affinity (Kd=58-296 nm) for unesterified long chain fatty acids (LCFAs). LCFA-CoA binding...

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