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PSBA_ALETA
ID   PSBA_ALETA              Reviewed;         347 AA.
AC   Q9TM69;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-2000, sequence version 1.
DT   03-AUG-2022, entry version 87.
DE   RecName: Full=Photosystem II protein D1 {ECO:0000255|HAMAP-Rule:MF_01379};
DE            Short=PSII D1 protein {ECO:0000255|HAMAP-Rule:MF_01379};
DE            EC=1.10.3.9 {ECO:0000255|HAMAP-Rule:MF_01379};
DE   AltName: Full=Photosystem II Q(B) protein {ECO:0000255|HAMAP-Rule:MF_01379};
GN   Name=psbA {ECO:0000255|HAMAP-Rule:MF_01379};
OS   Alexandrium tamarense (Red tide dinoflagellate) (Gonyaulax tamarensis).
OG   Plastid; Chloroplast.
OC   Eukaryota; Sar; Alveolata; Dinophyceae; Gonyaulacales; Pyrocystaceae;
OC   Alexandrium.
OX   NCBI_TaxID=2926;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=OF151;
RA   Takishita K., Uchida A.;
RT   "Molecular cloning and nucleotide sequence analysis of psbA from the
RT   dinoflagellates: origin of the dinoflagellate plastid.";
RL   Phycol. Res. 47:207-216(1999).
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. {ECO:0000255|HAMAP-Rule:MF_01379}.
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_01379};
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. D1 provides most of
CC       the ligands for the Mn4-Ca-O5 cluster of the oxygen-evolving complex
CC       (OEC). There is also a Cl(-1) ion associated with D1 and D2, which is
CC       required for oxygen evolution. The PSII complex binds additional
CC       chlorophylls, carotenoids and specific lipids. {ECO:0000255|HAMAP-
CC       Rule:MF_01379};
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_01379}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01379}; Multi-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- PTM: Tyr-163 forms a radical intermediate that is referred to as redox-
CC       active TyrZ, YZ or Y-Z. {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- MISCELLANEOUS: 2 of the reaction center chlorophylls (ChlD1 and ChlD2)
CC       are entirely coordinated by water. {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- MISCELLANEOUS: Herbicides such as atrazine, BNT, diuron or ioxynil bind
CC       in the Q(B) binding site and block subsequent electron transfer.
CC       {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- SIMILARITY: Belongs to the reaction center PufL/M/PsbA/D family.
CC       {ECO:0000255|HAMAP-Rule:MF_01379}.
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DR   EMBL; AB025589; BAA83816.2; -; Genomic_DNA.
DR   AlphaFoldDB; Q9TM69; -.
DR   SMR; Q9TM69; -.
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:0016682; F:oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0009772; P:photosynthetic electron transport in photosystem II; IEA:InterPro.
DR   GO; GO:0009635; P:response to herbicide; IEA:UniProtKB-KW.
DR   Gene3D; 1.20.85.10; -; 1.
DR   HAMAP; MF_01379; PSII_PsbA_D1; 1.
DR   InterPro; IPR036854; Photo_II_D1/D2_sf.
DR   InterPro; IPR000484; Photo_RC_L/M.
DR   InterPro; IPR005867; PSII_D1.
DR   PANTHER; PTHR33149; PTHR33149; 1.
DR   Pfam; PF00124; Photo_RC; 1.
DR   PRINTS; PR00256; REACTNCENTRE.
DR   SUPFAM; SSF81483; SSF81483; 1.
DR   TIGRFAMs; TIGR01151; psbA; 1.
DR   PROSITE; PS00244; REACTION_CENTER; 1.
PE   3: Inferred from homology;
KW   Calcium; Chlorophyll; Chloroplast; Chromophore; Electron transport;
KW   Herbicide resistance; Iron; Magnesium; Manganese; Membrane; Metal-binding;
KW   Oxidoreductase; Photosynthesis; Photosystem II; Plastid; Thylakoid;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..347
FT                   /note="Photosystem II protein D1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT                   /id="PRO_0000316491"
FT   TRANSMEM        31..48
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        120..135
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        144..158
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        199..220
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        276..290
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         120
FT                   /ligand="chlorophyll a"
FT                   /ligand_id="ChEBI:CHEBI:58416"
FT                   /ligand_label="ChlzD1"
FT                   /ligand_part="Mg"
FT                   /ligand_part_id="ChEBI:CHEBI:25107"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         128
FT                   /ligand="pheophytin a"
FT                   /ligand_id="ChEBI:CHEBI:136840"
FT                   /ligand_label="D1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         172
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         191
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         200
FT                   /ligand="chlorophyll a"
FT                   /ligand_id="ChEBI:CHEBI:58416"
FT                   /ligand_label="PD1"
FT                   /ligand_part="Mg"
FT                   /ligand_part_id="ChEBI:CHEBI:25107"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         217
FT                   /ligand="a quinone"
FT                   /ligand_id="ChEBI:CHEBI:132124"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         217
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_01379"
FT   BINDING         266..267
FT                   /ligand="a quinone"
FT                   /ligand_id="ChEBI:CHEBI:132124"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         274
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_01379"
FT   BINDING         334
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         335
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         344
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   SITE            163
FT                   /note="Tyrosine radical intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   SITE            192
FT                   /note="Stabilizes free radical intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
SQ   SEQUENCE   347 AA;  38230 MW;  B3FA659292EE33C4 CRC64;
     MKNTYRASNI SGFNWWGTVI GFILSTSNRF YIGWFGIFMF PLTGLAIIAY VAAFILAPPV
     DIDGIREPVA GSLLYGNNII SGAVIPSSNA IGVHFYPEWE SATLLEWLYN GGTYQFVVLH
     FIGGVSSWMG REWEFSFRLG MRPWIYLAFS APLVAATAVF VFYPIGQGSF SDGMPLGVSG
     TFNFMLVFQA EHNILMHPFH ILGVAGVFGG SLFSAMHGSL VTSSLLAETS GDVSLNVGYN
     FGQEDETYSI SAAHGYFGRL IFQYASFNNS RSLHFFLAAW PVIGIWFTAL GVSTMAFNLN
     GLNFNQSIID SNGHLINSWA DLVNRANLGI EVMHERNTHH YPLDLGL
 
 
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