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PSBA1_SYNE7
ID   PSBA1_SYNE7             Reviewed;         360 AA.
AC   P04996; P04847; Q31R63;
DT   13-AUG-1987, integrated into UniProtKB/Swiss-Prot.
DT   13-AUG-1987, sequence version 1.
DT   03-AUG-2022, entry version 152.
DE   RecName: Full=Photosystem II protein D1 1 {ECO:0000255|HAMAP-Rule:MF_01379};
DE            Short=PSII D1 protein 1 {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 1 {ECO:0000255|HAMAP-Rule:MF_01379};
DE   Flags: Precursor;
GN   Name=psbA1 {ECO:0000255|HAMAP-Rule:MF_01379, ECO:0000305}; Synonyms=psbA-I;
GN   OrderedLocusNames=Synpcc7942_0424;
OS   Synechococcus elongatus (strain PCC 7942 / FACHB-805) (Anacystis nidulans
OS   R2).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus.
OX   NCBI_TaxID=1140;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3098559; DOI=10.1002/j.1460-2075.1986.tb04569.x;
RA   Golden S.S., Brusslan J., Haselkorn R.;
RT   "Expression of a family of psbA genes encoding a photosystem II polypeptide
RT   in the cyanobacterium Anacystis nidulans R2.";
RL   EMBO J. 5:2789-2798(1986).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND MUTAGENESIS OF SER-264.
RX   PubMed=3929379; DOI=10.1126/science.3929379;
RA   Golden S.S., Haselkorn R.;
RT   "Mutation to herbicide resistance maps within the psbA gene of Anacystis
RT   nidulans R2.";
RL   Science 229:1104-1107(1985).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7942 / FACHB-805;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA   Hammon N., Israni S., Pitluck S., Schmutz J., Larimer F., Land M.,
RA   Kyrpides N., Lykidis A., Richardson P.;
RT   "Complete sequence of chromosome 1 of Synechococcus elongatus PCC 7942.";
RL   Submitted (AUG-2005) 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. {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: Cyanobacterial PSII is composed of 1 copy each of membrane
CC       proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK,
CC       PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral
CC       proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms
CC       dimeric complexes. {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01379}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01379}.
CC   -!- PTM: Tyr-161 forms a radical intermediate that is referred to as redox-
CC       active TyrZ, YZ or Y-Z. {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- PTM: C-terminally processed by CtpA; processing is essential to allow
CC       assembly of the oxygen-evolving complex and thus photosynthetic growth.
CC       {ECO:0000255|HAMAP-Rule:MF_01379}.
CC   -!- MISCELLANEOUS: Cyanobacteria usually contain more than 2 copies of the
CC       psbA gene. {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, ECO:0000269|PubMed:3929379}.
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; X04616; CAA28291.1; -; Genomic_DNA.
DR   EMBL; M11557; AAA22055.1; -; Genomic_DNA.
DR   EMBL; CP000100; ABB56456.1; -; Genomic_DNA.
DR   RefSeq; WP_011243404.1; NC_007604.1.
DR   AlphaFoldDB; P04996; -.
DR   SMR; P04996; -.
DR   STRING; 1140.Synpcc7942_0424; -.
DR   PRIDE; P04996; -.
DR   EnsemblBacteria; ABB56456; ABB56456; Synpcc7942_0424.
DR   KEGG; syf:Synpcc7942_0424; -.
DR   eggNOG; ENOG502Z87P; Bacteria.
DR   HOGENOM; CLU_054206_1_0_3; -.
DR   OMA; CQWVTDT; -.
DR   OrthoDB; 382342at2; -.
DR   BioCyc; MetaCyc:SYNPCC7942_0424-MON; -.
DR   BioCyc; SYNEL:SYNPCC7942_0424-MON; -.
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:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
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:0010242; F:oxygen evolving activity; IEA:UniProtKB-EC.
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   CDD; cd09289; Photosystem-II_D1; 1.
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   1: Evidence at protein level;
KW   Calcium; Chlorophyll; Chromophore; Electron transport;
KW   Herbicide resistance; Iron; Magnesium; Manganese; Membrane; Metal-binding;
KW   Oxidoreductase; Photosynthesis; Photosystem II; Thylakoid; Transmembrane;
KW   Transmembrane helix; Transport.
FT   CHAIN           1..344
FT                   /note="Photosystem II protein D1 1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT                   /id="PRO_0000090489"
FT   PROPEP          345..360
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT                   /id="PRO_0000316410"
FT   TRANSMEM        29..46
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        118..133
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        142..156
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        197..218
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   TRANSMEM        274..288
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         118
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         126
FT                   /ligand="pheophytin a"
FT                   /ligand_id="ChEBI:CHEBI:136840"
FT                   /ligand_label="D1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         170
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         189
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         198
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         215
FT                   /ligand="a quinone"
FT                   /ligand_id="ChEBI:CHEBI:132124"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
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_01379"
FT   BINDING         264..265
FT                   /ligand="a quinone"
FT                   /ligand_id="ChEBI:CHEBI:132124"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         272
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         332
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         333
FT                   /ligand="[CaMn4O5] cluster"
FT                   /ligand_id="ChEBI:CHEBI:189552"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   BINDING         342
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            161
FT                   /note="Tyrosine radical intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   SITE            190
FT                   /note="Stabilizes free radical intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   SITE            344..345
FT                   /note="Cleavage; by CtpA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01379"
FT   MUTAGEN         264
FT                   /note="S->A: Herbicide resistance."
FT                   /evidence="ECO:0000269|PubMed:3929379"
SQ   SEQUENCE   360 AA;  39965 MW;  EB543BFC716CD040 CRC64;
     MTSILREQRR DNVWDRFCEW VTSTDNRIYV GWFGVLMIPT LLTATICFIV AFIAAPPVDI
     DGIREPVAGS LMYGNNIISG AVVPSSNAIG LHFYPIWEAA SLDEWLYNGG PYQLVVFHFL
     LGISCYMGRQ WELSYRLGMR PWICVAYSAP LSAAFAVFLI YPIGQGSFSD GMPLGISGTF
     NFMFVFQAEH NILMHPFHML GVAGVFGGSL FSAMHGSLVT SSLVRETTET ESQNYGYKFG
     QEEETYNIVA AHGYFGRLIF QYASFNNSRS LHFFLGAWPV VGIWFTSMGI STMAFNLNGF
     NFNQSVLDSQ GKVINTWADV LNRANLGMEV MHERNAHNFP LDLAAGEATP VALTAPSIHG
 
 
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