Structural changes accompanying human serum albumin's binding of fatty acids are concerted.
Long chain fatty acids (LCFAs), a major source of cellular energy, are solubilized and transported in the blood by binding to serum albumin. Changes in human serum albumin's (HSA's) UV absorption and characteristic reactivity with pyridoxal-5'-phosphate appear to reflect a concerted change in its structure upon binding five equivalents of myristate. Isothermal titrations with myristate and other LCFA anions are also consistent with the presence of five strong, interacting, binding sites. Although HSA is usually thought to have many independent LCFA anion binding sites, just five interacting sites appear to account for the changes in structure that accompany its binding of myristate.
Fang
Yunnan
Y
Ohio State Biochemistry Program, Ohio State University, Columbus, OH 43210, USA.
Tong
Grace C
GC
Means
Gary E
GE
D001665:Binding Sites; D002151:Calorimetry; D005227:Fatty Acids / Q000737:chemistry*; D006801:Humans; D019814:Myristic Acid / Q000737:chemistry; D011487:Protein Conformation; D011732:Pyridoxal Phosphate / Q000737:chemistry; D012709:Serum Albumin / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
D005227:Fatty Acids; D012709:Serum Albumin; D019814:Myristic Acid; D011732:Pyridoxal Phosphate