Photosynthetica 2011, 49(4):573-580 | DOI: 10.1007/s11099-011-0070-7

PsbO, PsbP, and PsbQ of photosystem II are encoded by gene families in Nicotiana benthamiana. Structure and functionality of their isoforms

M. L. Pérez-Bueno1,2,*, M. Barón1, I. García-Luque1
1 Departamento de Bioquímica y Biología Molecular y Celular de Plantas. Estación Experimental del Zaidín, CSIC, Granada, Spain
2 Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain

The extrinsic proteins of photosystem II in plants (PsbO, PsbP and PsbQ) are known to be targets of stress. In previous work, differential regulation of hypothetical isoforms of these proteins was observed in Nicotiana benthamiana upon viral infection. Each of these proteins is encoded by a multigene family in this species: there are at least four genes encoding PsbO and PsbP and two encoding PsbQ. The results of structural and functional analyses suggest that PsbO and PsbP isoforms could show differences in activity, based on significant substitutions in their primary structure. Two psbQ sequences were isolated which encode identical mature proteins.

Additional key words: oxygen-evolving complex; photosystem II; PsbO; PsbP; PsbQ; stress

Received: February 15, 2011; Accepted: September 10, 2011; Published: December 1, 2011  Show citation

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Pérez-Bueno, M.L., Barón, M., & García-Luque, I. (2011). PsbO, PsbP, and PsbQ of photosystem II are encoded by gene families in Nicotiana benthamiana. Structure and functionality of their isoforms. Photosynthetica, 49(4), 573-580. doi: 10.1007/s11099-011-0070-7
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