oxygen evolving enhancer 3 (PsbQ) family protein. similar to PSBQ/PSBQ-2/PSII-Q (PHOTOSYSTEM II SUBUNIT Q-2), calcium ion binding [Arabidopsis thaliana] (TAIR:AT4G05180.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO48361.1); contains InterPro domain Photosystem II oxygen evolving complex protein PsbQ; (InterPro:IPR008797)