Härndahl Ulrika, Sundby Cecilia
Department of Biochemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden.
Physiol Plant. 2001 Mar;111(3):273-275. doi: 10.1034/j.1399-3054.2001.1110302.x.
It has been suggested that the function of the chloroplast-localized small heat shock protein (sHsp) is to protect photosystem II (PSII) from heat inactivation. This paper reports that addition of purified sHsp protein to isolated thylakoid membranes gave no protection of PSII and questions that there is any direct effect of the sHsp on PSII. The opinion is forwarded that the primary role for the chloroplast-localized sHsp may not even be protection of PSII.
有人提出，定位于叶绿体的小分子热激蛋白（sHsp）的功能是保护光系统II（PSII）免受热失活影响。本文报道，向分离的类囊体膜中添加纯化的sHsp蛋白并不能保护PSII，并对sHsp对PSII有任何直接影响提出质疑。有人进而认为，定位于叶绿体的sHsp的主要作用甚至可能不是保护PSII。
