PSBD_HELAN
ID PSBD_HELAN Reviewed; 353 AA.
AC Q1KXW4;
DT 20-JAN-2009, integrated into UniProtKB/Swiss-Prot.
DT 30-MAY-2006, sequence version 1.
DT 03-AUG-2022, entry version 75.
DE RecName: Full=Photosystem II D2 protein {ECO:0000255|HAMAP-Rule:MF_01383};
DE Short=PSII D2 protein {ECO:0000255|HAMAP-Rule:MF_01383};
DE EC=1.10.3.9 {ECO:0000255|HAMAP-Rule:MF_01383};
DE AltName: Full=Photosystem Q(A) protein {ECO:0000255|HAMAP-Rule:MF_01383};
GN Name=psbD {ECO:0000255|HAMAP-Rule:MF_01383};
OS Helianthus annuus (Common sunflower).
OG Plastid; Chloroplast.
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC asterids; campanulids; Asterales; Asteraceae; Asteroideae;
OC Heliantheae alliance; Heliantheae; Helianthus.
OX NCBI_TaxID=4232;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=cv. HA383;
RA Timme R.E., Kuehl J.V., Boore J.L., Jansen R.K.;
RT "A comparison of the first two published chloroplast genomes in Asteraceae:
RT Lactuca and Helianthus.";
RL Submitted (JAN-2006) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Photosystem II (PSII) is a light-driven water:plastoquinone
CC oxidoreductase that uses light energy to abstract electrons from H(2)O,
CC generating O(2) and a proton gradient subsequently used for ATP
CC formation. It consists of a core antenna complex that captures photons,
CC and an electron transfer chain that converts photonic excitation into a
CC charge separation. The D1/D2 (PsbA/PsbA) reaction center heterodimer
CC binds P680, the primary electron donor of PSII as well as several
CC subsequent electron acceptors. D2 is needed for assembly of a stable
CC PSII complex. {ECO:0000255|HAMAP-Rule:MF_01383}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 a plastoquinone + 2 H2O + 4 hnu = 2 a plastoquinol + O2;
CC Xref=Rhea:RHEA:36359, Rhea:RHEA-COMP:9561, Rhea:RHEA-COMP:9562,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15379, ChEBI:CHEBI:17757,
CC ChEBI:CHEBI:30212, ChEBI:CHEBI:62192; EC=1.10.3.9;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01383};
CC -!- COFACTOR:
CC Note=The D1/D2 heterodimer binds P680, chlorophylls that are the
CC primary electron donor of PSII, and subsequent electron acceptors. It
CC shares a non-heme iron and each subunit binds pheophytin, quinone,
CC additional chlorophylls, carotenoids and lipids. There is also a Cl(-1)
CC ion associated with D1 and D2, which is required for oxygen evolution.
CC The PSII complex binds additional chlorophylls, carotenoids and
CC specific lipids. {ECO:0000255|HAMAP-Rule:MF_01383};
CC -!- SUBUNIT: PSII is composed of 1 copy each of membrane proteins PsbA,
CC PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT,
CC PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral proteins of the oxygen-
CC evolving complex and a large number of cofactors. It forms dimeric
CC complexes. {ECO:0000255|HAMAP-Rule:MF_01383}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000255|HAMAP-Rule:MF_01383}; Multi-pass membrane protein
CC {ECO:0000255|HAMAP-Rule:MF_01383}.
CC -!- MISCELLANEOUS: 2 of the reaction center chlorophylls (ChlD1 and ChlD2)
CC are entirely coordinated by water. {ECO:0000255|HAMAP-Rule:MF_01383}.
CC -!- SIMILARITY: Belongs to the reaction center PufL/M/PsbA/D family.
CC {ECO:0000255|HAMAP-Rule:MF_01383}.
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DR EMBL; DQ383815; ABD47141.1; -; Genomic_DNA.
DR RefSeq; YP_588112.1; NC_007977.1.
DR AlphaFoldDB; Q1KXW4; -.
DR SMR; Q1KXW4; -.
DR GeneID; 4055584; -.
DR KEGG; han:4055584; -.
DR OMA; RWFQLGG; -.
DR OrthoDB; 801765at2759; -.
DR PhylomeDB; Q1KXW4; -.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR GO; GO:0016168; F:chlorophyll binding; IEA:UniProtKB-UniRule.
DR GO; GO:0045156; F:electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity; IEA:InterPro.
DR GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0010242; F:oxygen evolving activity; IEA:UniProtKB-EC.
DR GO; GO:0009772; P:photosynthetic electron transport in photosystem II; IEA:InterPro.
DR CDD; cd09288; Photosystem-II_D2; 1.
DR Gene3D; 1.20.85.10; -; 1.
DR HAMAP; MF_01383; PSII_PsbD_D2; 1.
DR InterPro; IPR036854; Photo_II_D1/D2_sf.
DR InterPro; IPR000484; Photo_RC_L/M.
DR InterPro; IPR005868; PSII_PsbD/D2.
DR PANTHER; PTHR33149; PTHR33149; 1.
DR Pfam; PF00124; Photo_RC; 1.
DR PRINTS; PR00256; REACTNCENTRE.
DR SUPFAM; SSF81483; SSF81483; 1.
DR TIGRFAMs; TIGR01152; psbD; 1.
DR PROSITE; PS00244; REACTION_CENTER; 1.
PE 3: Inferred from homology;
KW Acetylation; Chlorophyll; Chloroplast; Chromophore; Electron transport;
KW Iron; Magnesium; Membrane; Metal-binding; Oxidoreductase; Phosphoprotein;
KW Photosynthesis; Photosystem II; Plastid; Thylakoid; Transmembrane;
KW Transmembrane helix; Transport.
FT INIT_MET 1
FT /note="Removed"
FT /evidence="ECO:0000250|UniProtKB:P56761"
FT CHAIN 2..353
FT /note="Photosystem II D2 protein"
FT /id="PRO_0000359656"
FT TRANSMEM 41..61
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT TRANSMEM 125..141
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT TRANSMEM 153..166
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT TRANSMEM 208..228
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT TRANSMEM 279..295
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 118
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="ChlzD2"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 130
FT /ligand="pheophytin a"
FT /ligand_id="ChEBI:CHEBI:136840"
FT /ligand_label="D2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 143
FT /ligand="pheophytin a"
FT /ligand_id="ChEBI:CHEBI:136840"
FT /ligand_label="D2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 198
FT /ligand="chlorophyll a"
FT /ligand_id="ChEBI:CHEBI:58416"
FT /ligand_label="PD2"
FT /ligand_part="Mg"
FT /ligand_part_id="ChEBI:CHEBI:25107"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 215
FT /ligand="a plastoquinone"
FT /ligand_id="ChEBI:CHEBI:17757"
FT /ligand_label="Q(A)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 215
FT /ligand="Fe cation"
FT /ligand_id="ChEBI:CHEBI:24875"
FT /ligand_note="ligand shared with heterodimeric partner"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 262
FT /ligand="a plastoquinone"
FT /ligand_id="ChEBI:CHEBI:17757"
FT /ligand_label="Q(A)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT BINDING 269
FT /ligand="Fe cation"
FT /ligand_id="ChEBI:CHEBI:24875"
FT /ligand_note="ligand shared with heterodimeric partner"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01383"
FT MOD_RES 2
FT /note="N-acetylthreonine"
FT /evidence="ECO:0000250|UniProtKB:P56761"
FT MOD_RES 2
FT /note="Phosphothreonine"
FT /evidence="ECO:0000250|UniProtKB:P56761"
SQ SEQUENCE 353 AA; 39535 MW; 8F2BC6DE33BD129C CRC64;
MTIALGKFTK DENDLFDIMD DWLRRDRFVF VGWSGLLLFP CAYFAVGGWF TGTTFVTSWY
THGLASSYLE GCNFLTAAVS TPANSLAHSL LLLWGPEAQG DFTRWCQLGG LWTFVALHGA
FGLIGFMLRQ FELARSVQLR PYNAIAFSGP IAVFVSVFLI YPLGQSGWFF APSFGVAAIF
RFILFFQGFH NWTLNPFHMM GVAGVLGAAL LCAIHGATVE NTLFEDGDGA NTFRAFNPTQ
AEETYSMVTA NRFWSQIFGV AFSNKRWLHF FMLFVPVTGL WMSALGVVGL ALNLRAYDFV
SQEIRAAEDP EFETFYTKNI LLNEGIRAWM AAQDQPHENL IFPEEVLPRG NAL
