Effect of phosphatidylglycerol on conformation and microenvironment of tyrosyl residue in photosystem II  

作　　者：阳振乐 李良璧 许亦农 匡廷云 

机构地区：[1]Photosynthesis Research Center, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

出　　处：《Science China(Life Sciences)》2000年第3期330-336,共7页中国科学（生命科学英文版）

摘　　要：The structural aspects in the interaction of phosphatidylglycerol (PG) with photosystem II (PSIl), mainly the effect of PQ on conformation and microenvironment of tyrosine residues of PSIl proteins were studied by Fourier transform infrared (FTIR) spectroscopy. It was found that the binding of PG to PSIl particle induces changes in the conformation and micropolarity of phenol ring in the tyrosine residues. In other words, the PG effect on the PSIl results in blue shift of the stretch vibrational band in the phenol ring from 1620 to 1500 cm-1 with the enhancement of the absorb-ance intensity. Additionally, a new spectrum of hydrogen bond was also observed. The results imply that the hydrogen-bond formation between the OH group of phenol and one of PG might cause changes in the structures of tyrosine residues in PSIl proteins.The structural aspects in the interaction of phosphatidylglycerol (PG) with photosystem II (PSIl), mainly the effect of PQ on conformation and microenvironment of tyrosine residues of PSIl proteins were studied by Fourier transform infrared (FTIR) spectroscopy. It was found that the binding of PG to PSIl particle induces changes in the conformation and micropolarity of phenol ring in the tyrosine residues. In other words, the PG effect on the PSIl results in blue shift of the stretch vibrational band in the phenol ring from 1620 to 1500 cm-1 with the enhancement of the absorb-ance intensity. Additionally, a new spectrum of hydrogen bond was also observed. The results imply that the hydrogen-bond formation between the OH group of phenol and one of PG might cause changes in the structures of tyrosine residues in PSIl proteins.

关 键 词：PHOTOSYSTEM II PHOSPHATIDYLGLYCEROL TYROSINE RESIDUE Fourier transform infrared spectroscopy. 

分 类 号：Q945[生物学—植物学]