Heat inactivation of oxygen evolution in Photosystem II particles and its acceleration by chloride depletion and exogenous manganese

doi:10.1016/0005-2728(85)90115-X

Biochimica et Biophysica Acta (BBA) - Bioenergetics

Volume 807, Issue 2, 3 May 1985, Pages 127-133

https://doi.org/10.1016/0005-2728(85)90115-X Get rights and content

Abstract

Heat inactivation of oxygen evolution by isolated Photosystem II particles was accelerated by Cl⁻ depletion and exogenous Mn²⁺. Weak red light also accelerated heat inactivation. Heat treatment released the 33, 24 and 18 kDa proteins and Mn from the Photosystem II particles. The protein release was stimulated by Cl⁻ depletion and exogenous Mn²⁺, and the Mn release was also stimulated by Cl⁻ depletion. A 50% loss of Mn corresponded to full inactivation of oxygen evolution, whereas no direct correlation seemed to exist between the loss of any one protein and inactivation of oxygen evolution. Removal of the 24 and 18 kDa proteins from photosystem II particles only slightly decreased the heat stability of oxygen evolution.

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^∗: Present address: Botany Department, University of Adelaide, Adelaide 5001, South Australia, Australia.

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Regular paperHeat inactivation of oxygen evolution in Photosystem II particles and its acceleration by chloride depletion and exogenous manganese

Abstract

Arch. Biochem. Biophys.

Biochem. Biophys. Res. Commun.

Biochim. Biophys. Acta

Biochim. Biophys. Acta

Biochim. Biophys. Acta

Biochim. Biophys. Acta

FEBS Lett.

Biochim. Biophys. Acta

Biochim. Biophys. Acta

Biochim. Biophys. Acta

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Biochim. Biophys. Acta

Regular paper
Heat inactivation of oxygen evolution in Photosystem II particles and its acceleration by chloride depletion and exogenous manganese