Protein: Photosystem II D2 protein (PSII D2 protein) (EC 1.10.3.9) (Photosystem Q(A) protein) (Q6ENJ1)
Organism: Oryza nivara (Indian wild rice) (Oryza sativa f. spontanea)
Function: Photosystem II (PSII) is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbA) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors. D2 is needed for assembly of a stable PSII complex.
Subcellular location: Plastid, chloroplast thylakoid membrane {ECO:0000255|HAMAP-Rule:MF_01383}; Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01383}.
Sequence: MTIALGRVTKEENDLFDIMDDWLRRDRFVFVGWSGLLLFPCAYFALGGWFTGTTFVTSWYTHGLASSYLEGCNFLTAAVSTPANSLAHSLLLLWGPEAQGDFTRWCQLGGLWTFVALHGAFALIGFMLRQFELARSVQLRPYNAISFSGPIAVFVSVFLIYPLGQSGWFFAPSFGVAAIFRFILFFQGFHNWTLNPFHMMGVAGVLGAALLCAIHGATVENTLFEDGDGANTFRAFNPTQAEETYSMVTANRFWSQIFGVAFSNKRWLHFFMLFVPVTGLWMSAIGVVGLALNLRAYDFVSQEIRAAEDPEFETFYTKNILLNEGIRAWMAAQDQPHENLIFPEEVLPRGNAL
InterPro domains: - IPR005868: Photosystem II D2 (family) [1-353]
- IPR036854: Photosystem II protein D1/D2 superfamily (homologous_superfamily) [16-352]
- IPR055266: Photosystem II protein D1/D2 (family) [1-352]
- IPR055265: Photosynthetic reaction centre, L/M, conserved site (conserved_site) [191-217]
- IPR000484: Photosynthetic reaction centre, L/M (family) [29-318]
Interaction partners: - Photosystem II CP43 reaction center protein
- Photosystem II CP47 reaction center protein
- Cytochrome b559 subunit beta
- Cytochrome b559 subunit alpha
- Photosystem II protein D1
- Photosystem II protein D1
- Uncharacterized protein
- Photosystem II reaction center protein H
- Cytochrome b6-f complex subunit 4
- Photosystem II reaction center protein K
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0003824 (catalytic activity), GO:0043167 (ion binding), GO:0016787 (hydrolase activity), GO:0043169 (cation binding), GO:0016798 (hydrolase activity, acting on glycosyl bonds), GO:0004553 (hydrolase activity, hydrolyzing O-glycosyl compounds), GO:0046872 (metal ion binding), GO:0005509 (calcium ion binding)
Biological Process (BP): GO:0008150 (biological process), GO:0050789 (regulation of biological process), GO:0065007 (biological regulation), GO:0048518 (positive regulation of biological process), GO:0050794 (regulation of cellular process), GO:0048522 (positive regulation of cellular process), GO:0010941 (regulation of cell death), GO:0010942 (positive regulation of cell death), GO:0043067 (regulation of programmed cell death), GO:0043068 (positive regulation of programmed cell death), GO:0043065 (positive regulation of apoptotic process), GO:0042981 (regulation of apoptotic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005737 (cytoplasm), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0009536 (plastid), GO:0043231 (intracellular membrane-bounded organelle)