Is the Photosystem II Complex a Monomer or a Dimer? | Zendy

M. Watanabe | Zendy; Masako Iwai | Zendy; Rei Narikawa | Zendy; Masashi Ikeuchi | Zendy

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Is the Photosystem II Complex a Monomer or a Dimer?

Author(s) -

M. Watanabe,

Masako Iwai,

Rei Narikawa,

Masashi Ikeuchi

Publication year - 2009

Publication title -

plant and cell physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.975

H-Index - 152

eISSN - 1471-9053

pISSN - 0032-0781

DOI - 10.1093/pcp/pcp112

Subject(s) - dimer , photosystem ii , thylakoid , monomer , mutant , chemistry , photosystem i , biophysics , photochemistry , crystallography , photosynthesis , biochemistry , biology , chloroplast , gene , polymer , organic chemistry

It is widely believed that the photosystem II (PSII) complex may function as a dimer in the thylakoid membrane. Here, we report experimental conversion from the monomeric PSII to the dimeric form by treatment with high concentrations of n-dodecyl-beta-D-maltopyranoside (DM). The content of the PSII monomer in a PsbTc deletion mutant was much higher than in the wild type when solubilized with low concentrations of DM. However, upon treatment with higher concentrations of DM, the PSII dimer was also recovered in the PsbTc deletion mutant. These results suggest that there are at least two distinct processes of dimerization: (i) PsbTc dependent and (ii) DM induced. We discuss the results with regard to the native assembly form(s) of PSII.

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