ID   HNS_SALPA               Reviewed;         137 AA.
AC   Q5PCT5;
DT   26-APR-2005, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 87.
DE   RecName: Full=DNA-binding protein H-NS;
DE   AltName: Full=Histone-like protein HLP-II;
DE   AltName: Full=Protein B1;
DE   AltName: Full=Protein H1;
GN   Name=hns; Synonyms=hnsA, osmZ; OrderedLocusNames=SPA1127;
OS   Salmonella paratyphi A (strain ATCC 9150 / SARB42).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Salmonella.
OX   NCBI_TaxID=295319;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 9150 / SARB42;
RX   PubMed=15531882; DOI=10.1038/ng1470;
RA   McClelland M., Sanderson K.E., Clifton S.W., Latreille P., Porwollik S.,
RA   Sabo A., Meyer R., Bieri T., Ozersky P., McLellan M., Harkins C.R.,
RA   Wang C., Nguyen C., Berghoff A., Elliott G., Kohlberg S., Strong C., Du F.,
RA   Carter J., Kremizki C., Layman D., Leonard S., Sun H., Fulton L., Nash W.,
RA   Miner T., Minx P., Delehaunty K., Fronick C., Magrini V., Nhan M.,
RA   Warren W., Florea L., Spieth J., Wilson R.K.;
RT   "Comparison of genome degradation in Paratyphi A and Typhi, human-
RT   restricted serovars of Salmonella enterica that cause typhoid.";
RL   Nat. Genet. 36:1268-1274(2004).
CC   -!- FUNCTION: A DNA-binding protein implicated in transcriptional
CC       repression and chromosome organization and compaction. Binds nucleation
CC       sites in AT-rich DNA and bridges them, forming higher-order
CC       nucleoprotein complexes and condensing the chromosome. As many
CC       horizontally transferred genes are AT-rich, it plays a central role in
CC       silencing foreign genes. A subset of genes are repressed by H-NS in
CC       association with other proteins (By similarity).
CC       {ECO:0000250|UniProtKB:P0ACF8}.
CC   -!- SUBUNIT: Homodimer that oligomerizes on DNA into higher-order complexes
CC       that form bridges between disparate regions of DNA compacting it.
CC       Interacts with Hha, YdgT and StpA. {ECO:0000250|UniProtKB:P0ACF8}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm, nucleoid
CC       {ECO:0000250|UniProtKB:P0ACF8}.
CC   -!- SIMILARITY: Belongs to the histone-like protein H-NS family.
CC       {ECO:0000305}.
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DR   EMBL; CP000026; AAV77088.1; -; Genomic_DNA.
DR   RefSeq; WP_001287382.1; NC_006511.1.
DR   AlphaFoldDB; Q5PCT5; -.
DR   BMRB; Q5PCT5; -.
DR   SMR; Q5PCT5; -.
DR   PRIDE; Q5PCT5; -.
DR   EnsemblBacteria; AAV77088; AAV77088; SPA1127.
DR   KEGG; spt:SPA1127; -.
DR   HOGENOM; CLU_117503_0_0_6; -.
DR   OMA; NGVEKTW; -.
DR   Proteomes; UP000008185; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-KW.
DR   GO; GO:0009295; C:nucleoid; IEA:UniProtKB-SubCell.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0046983; F:protein dimerization activity; IEA:InterPro.
DR   GO; GO:0030527; F:structural constituent of chromatin; IEA:InterPro.
DR   GO; GO:0006355; P:regulation of transcription, DNA-templated; IEA:InterPro.
DR   Gene3D; 1.10.287.1050; -; 1.
DR   Gene3D; 4.10.430.10; -; 1.
DR   InterPro; IPR027444; H-NS_C_dom.
DR   InterPro; IPR037150; H-NS_C_dom_sf.
DR   InterPro; IPR001801; Histone_HNS.
DR   InterPro; IPR027454; Histone_HNS_N.
DR   Pfam; PF00816; Histone_HNS; 1.
DR   PIRSF; PIRSF002096; HnS; 1.
DR   SMART; SM00528; HNS; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; DNA-binding; Repressor; Transcription; Transcription regulation.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..137
FT                   /note="DNA-binding protein H-NS"
FT                   /id="PRO_0000168508"
FT   DNA_BIND        112..117
FT                   /evidence="ECO:0000250|UniProtKB:P0A1S2"
FT   SITE            12
FT                   /note="Interacts with Hha"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   137 AA;  15601 MW;  A9620D93C7DD3EB1 CRC64;
     MSEALKILNN IRTLRAQARE CTLETLEEML EKLEVVVNER REEESAAAAE VEERTRKLQQ
     YREMLIADGI DPNELLNSMA AAKSGTKAKR AARPAKYSYV DENGETKTWT GQGRTPAVIK
     KAMEEQDKQL EDFLIKE