Reactivation of the oxygen evolution function after complete removal of manganese from preparations of photosystem II

M. A. Shafiyev; G. M. Anan'yev; S. I. Allakhverdiyev; T. N. Smolova; V. V. Klimov

Reactivation of the oxygen evolution function after complete removal of manganese from preparations of photosystem II

M. A. Shafiyev, G. M. Anan'yev, S. I. Allakhverdiyev, T. N. Smolova, V. V. Klimov

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Abstract

The authors have investigated the reactivation of the oxygen evolution function in particles of photosystem II (p.s.-II) after complete removal of Mn and water-soluble proteins with molecular weights 10, 17, 24 and 33 kDaltons. It is shown that the function of O₂ evolution in such particles may be reactivated by adding 5 μM MnCl₂ and 20 mm CaCl₂. It was established that the manifestation of the reactivation effect of evolution of O₂ requires preliminary illumination of the sample, the maximum value of reactivation of the rate of O₂ evolution is ~60 per cent of the control. It is concluded that in the reconstructed particles photosynthetic evolution of O₂ obeys a mechanism similar to that in the initial p.s.-II particles.

Original language	English
Pages (from-to)	66-71
Number of pages	6
Journal	Biophysics
Volume	33
Issue number	1
Publication status	Published - Dec 1 1988

ASJC Scopus subject areas

Biophysics

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title = "Reactivation of the oxygen evolution function after complete removal of manganese from preparations of photosystem II",

abstract = "The authors have investigated the reactivation of the oxygen evolution function in particles of photosystem II (p.s.-II) after complete removal of Mn and water-soluble proteins with molecular weights 10, 17, 24 and 33 kDaltons. It is shown that the function of O2 evolution in such particles may be reactivated by adding 5 μM MnCl2 and 20 mm CaCl2. It was established that the manifestation of the reactivation effect of evolution of O2 requires preliminary illumination of the sample, the maximum value of reactivation of the rate of O2 evolution is ~60 per cent of the control. It is concluded that in the reconstructed particles photosynthetic evolution of O2 obeys a mechanism similar to that in the initial p.s.-II particles.",

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AU - Shafiyev, M. A.

AU - Anan'yev, G. M.

AU - Allakhverdiyev, S. I.

AU - Smolova, T. N.

AU - Klimov, V. V.

PY - 1988/12/1

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N2 - The authors have investigated the reactivation of the oxygen evolution function in particles of photosystem II (p.s.-II) after complete removal of Mn and water-soluble proteins with molecular weights 10, 17, 24 and 33 kDaltons. It is shown that the function of O2 evolution in such particles may be reactivated by adding 5 μM MnCl2 and 20 mm CaCl2. It was established that the manifestation of the reactivation effect of evolution of O2 requires preliminary illumination of the sample, the maximum value of reactivation of the rate of O2 evolution is ~60 per cent of the control. It is concluded that in the reconstructed particles photosynthetic evolution of O2 obeys a mechanism similar to that in the initial p.s.-II particles.

AB - The authors have investigated the reactivation of the oxygen evolution function in particles of photosystem II (p.s.-II) after complete removal of Mn and water-soluble proteins with molecular weights 10, 17, 24 and 33 kDaltons. It is shown that the function of O2 evolution in such particles may be reactivated by adding 5 μM MnCl2 and 20 mm CaCl2. It was established that the manifestation of the reactivation effect of evolution of O2 requires preliminary illumination of the sample, the maximum value of reactivation of the rate of O2 evolution is ~60 per cent of the control. It is concluded that in the reconstructed particles photosynthetic evolution of O2 obeys a mechanism similar to that in the initial p.s.-II particles.

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Reactivation of the oxygen evolution function after complete removal of manganese from preparations of photosystem II

Abstract

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