ID   PSBN_PROMP              Reviewed;          50 AA.
AC   Q7V340;
DT   18-APR-2006, integrated into UniProtKB/Swiss-Prot.
DT   18-APR-2006, sequence version 2.
DT   25-MAY-2022, entry version 89.
DE   RecName: Full=Protein PsbN {ECO:0000255|HAMAP-Rule:MF_00293};
GN   Name=psbN {ECO:0000255|HAMAP-Rule:MF_00293}; OrderedLocusNames=PMM0252;
OS   Prochlorococcus marinus subsp. pastoris (strain CCMP1986 / NIES-2087 /
OS   MED4).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59919;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP1986 / NIES-2087 / MED4;
RX   PubMed=12917642; DOI=10.1038/nature01947;
RA   Rocap G., Larimer F.W., Lamerdin J.E., Malfatti S., Chain P., Ahlgren N.A.,
RA   Arellano A., Coleman M., Hauser L., Hess W.R., Johnson Z.I., Land M.L.,
RA   Lindell D., Post A.F., Regala W., Shah M., Shaw S.L., Steglich C.,
RA   Sullivan M.B., Ting C.S., Tolonen A., Webb E.A., Zinser E.R.,
RA   Chisholm S.W.;
RT   "Genome divergence in two Prochlorococcus ecotypes reflects oceanic niche
RT   differentiation.";
RL   Nature 424:1042-1047(2003).
CC   -!- FUNCTION: May play a role in photosystem I and II biogenesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00293}.
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   -!- 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 Synechocystis, 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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=CAE18711.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
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DR   EMBL; BX548174; CAE18711.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; WP_011131890.1; NC_005072.1.
DR   AlphaFoldDB; Q7V340; -.
DR   STRING; 59919.PMM0252; -.
DR   EnsemblBacteria; CAE18711; CAE18711; PMM0252.
DR   KEGG; pmm:PMM0252; -.
DR   eggNOG; ENOG5031YHY; Bacteria.
DR   HOGENOM; CLU_205504_1_0_3; -.
DR   OMA; LTDPWDE; -.
DR   Proteomes; UP000001026; 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   Pfam; PF02468; PsbN; 1.
PE   3: Inferred from homology;
KW   Membrane; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..50
FT                   /note="Protein PsbN"
FT                   /id="PRO_0000232787"
FT   TRANSMEM        14..34
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00293"
SQ   SEQUENCE   50 AA;  5225 MW;  9B4A03FEE681B323 CRC64;
     MQTLSSAPDP AVSVAVTILA VLLALTGFGL WTAFGPKAAK LTDPWDDHDD