The stereospecific synthesis of mixed-acid phospholipids with polyunsaturated fatty acid from d-mannitol
作者:Jie Xia、Yong-Zheng Hui
DOI:10.1016/s0957-4166(97)00005-0
日期:1997.2
Negative Charge at Amino Acid 149 Is the Molecular Determinant for Substrate Specificity of Lecithin:Cholesterol Acyltransferase for Phosphatidylcholine Containing 20-Carbon <i>sn</i>-2 Fatty Acyl Chains
作者:Yue Zhao、Jingchuan Wang、Abraham K. Gebre、Jeffrey W. Chisholm、John S. Parks
DOI:10.1021/bi035460u
日期:2003.12.1
demonstrated higher activity with PC species containing20-carbon, but not 18-carbon, sn-2 fatty acyl chains. The increased activity of hE149A was due to an increase in apparent V(max) but not to apparent K(m) or LCAT binding to the PC surface. Substitution of different amino acids in the 149 position of hLCAT showed that activation of the enzyme with sn-2 20:4 containing PC substrate was only observed when