Glycinebetaine stabilizes the association of extrinsic proteins with the photosynthetic oxygen‐evolving complex

FEBS Letters

Murata, N.¹  Papageorgiou, G.C.¹  Hayashi, H.¹  Mohanty, P.S.¹ 

[1] Department of Regulation Biology, National Institute for Basic Biology and Department of Molecular Biomechanics, Graduate University of Advanced Studies, Myodaiji, Okazaki 444, Japan

关键词: Glycinebetaine;    Oxygen evolution;    Photosynthesis;    Photosystem 2 complex;    Salt effect;   

DOI  :  10.1016/0014-5793(92)80376-R

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The photosynthetic oxygen-evolving activity of the photosystem 2 complex, prepared from spinach, was labile when the complex was exposed to high-salt conditions under which the extrinsic proteins were dissociated from the complex. Glycinebetaine prevented the dissociation of the 18-kDa and the 23-kDa extrinsic proteins from the photosystem 2 complex in the presence of 1 M NaCl. It also prevented the dissociation of the 33-kDa extrinsic protein from the complex in the presence of 1 M MgCl₂ or 1 M CaCl₂. The oxygen-evolving activity of the photosystem 2 complex was stabilized by glycinebetaine when the complex was subjected to treatment with NaCl and MgCl₂.

【 授权许可】

Unknown