ID   PSBN_SYNY3              Reviewed;          43 AA.
AC   P26286;
DT   01-MAY-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1992, sequence version 1.
DT   03-AUG-2022, entry version 120.
DE   RecName: Full=Protein PsbN {ECO:0000255|HAMAP-Rule:MF_00293};
GN   Name=psbN {ECO:0000255|HAMAP-Rule:MF_00293}; OrderedLocusNames=smr0009;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1907512; DOI=10.1007/bf00039508;
RA   Mayes S.R., Barber J.;
RT   "Primary structure of the psbN-psbH-petC-petA gene cluster of the
RT   cyanobacterium Synechocystis PCC 6803.";
RL   Plant Mol. Biol. 17:289-293(1991).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
RN   [3]
RP   FUNCTION, AND DISRUPTION PHENOTYPE.
RC   STRAIN=PCC 6803-G;
RX   PubMed=8431425; DOI=10.1021/bi00057a008;
RA   Mayers S.R., Dubbs J.M., Vass I., Hideg E., Nagy L., Barber J.;
RT   "Further characterization of the psbH locus of Synechocystis sp. PCC 6803:
RT   inactivation of psbH impairs QA to QB electron transport in photosystem
RT   2.";
RL   Biochemistry 32:1454-1465(1993).
CC   -!- FUNCTION: May play a role in photosystem I and II biogenesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00293, ECO:0000269|PubMed:8431425}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00293}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00293}.
CC   -!- DISRUPTION PHENOTYPE: In a double psbH-psbN deletion has a no more
CC       deleterious effect than the single psbH deletion, which suggests it has
CC       no role in photosystem II. {ECO:0000269|PubMed:8431425}.
CC   -!- SIMILARITY: Belongs to the PsbN family. {ECO:0000255|HAMAP-
CC       Rule:MF_00293}.
CC   -!- CAUTION: Originally thought to be a component of PSII; based on
CC       experiments in this organism, N.tabacum and barley, and its absence
CC       from PSII in T.elongatus and T.vulcanus, this is probably not true.
CC       {ECO:0000255|HAMAP-Rule:MF_00293, ECO:0000269|PubMed:8431425}.
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DR   EMBL; X58532; CAA41419.1; -; Genomic_DNA.
DR   EMBL; BA000022; BAA17630.1; -; Genomic_DNA.
DR   PIR; S16570; S16570.
DR   AlphaFoldDB; P26286; -.
DR   SMR; P26286; -.
DR   IntAct; P26286; 2.
DR   STRING; 1148.1652710; -.
DR   PaxDb; P26286; -.
DR   EnsemblBacteria; BAA17630; BAA17630; BAA17630.
DR   KEGG; syn:smr0009; -.
DR   eggNOG; ENOG50339MH; Bacteria.
DR   InParanoid; P26286; -.
DR   BioCyc; MetaCyc:PSBN-MON; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:InterPro.
DR   HAMAP; MF_00293; PSII_PsbN; 1.
DR   InterPro; IPR003398; PSII_PsbN.
DR   PANTHER; PTHR35326; PTHR35326; 1.
DR   Pfam; PF02468; PsbN; 1.
PE   3: Inferred from homology;
KW   Membrane; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..43
FT                   /note="Protein PsbN"
FT                   /id="PRO_0000207976"
FT   TRANSMEM        4..24
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00293"
SQ   SEQUENCE   43 AA;  4512 MW;  5891D8A7D5A2A915 CRC64;
     MESATVLSIT FAVILIAITG LAVYTSFGPP SAELGDPFDD HED