PMID: 21997768

Authors:

Wang Y, Luo Z, Shi X, Wang H, Nie L, Huang M

Title:

A fluorescent fatty acid probe, DAUDA, selectively displaces two myristates bound in human serum albumin.

Journal:

Protein Sci. 2011 Dec;20(12):2095-101. doi: 10.1002/pro.749. Epub 2011 Nov 9.

Abstract:

11-(Dansylamino) undecanoic acid (DAUDA) is a dansyl-type fluorophore and has widely used as a probe to determine the binding site for human serum albumin (HSA). Here, we reported that structure of HSA-Myristate-DAUDA ternary complex and identified clearly the presence of two DAUDA molecules at fatty acid (FA) binding site 6 and 7 of HSA, thus showing these two sites are weak FA binding sites. This result also show that DAUDA is an appropriate probe for FA site 6 and 7 on HSA as previous studied, but not a good probe of FA binding site 1 that is likely bilirubin binding site on HSA.