ID   XERS_LACLA              Reviewed;         356 AA.
AC   Q9CG78;
DT   22-AUG-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2001, sequence version 1.
DT   25-MAY-2022, entry version 108.
DE   RecName: Full=Tyrosine recombinase XerS {ECO:0000255|HAMAP-Rule:MF_01816};
GN   Name=xerS {ECO:0000255|HAMAP-Rule:MF_01816}; OrderedLocusNames=LL1232;
GN   ORFNames=L57903;
OS   Lactococcus lactis subsp. lactis (strain IL1403) (Streptococcus lactis).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Lactococcus.
OX   NCBI_TaxID=272623;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=IL1403;
RX   PubMed=11337471; DOI=10.1101/gr.gr-1697r;
RA   Bolotin A., Wincker P., Mauger S., Jaillon O., Malarme K., Weissenbach J.,
RA   Ehrlich S.D., Sorokin A.;
RT   "The complete genome sequence of the lactic acid bacterium Lactococcus
RT   lactis ssp. lactis IL1403.";
RL   Genome Res. 11:731-753(2001).
CC   -!- FUNCTION: Site-specific tyrosine recombinase, which acts by catalyzing
CC       the cutting and rejoining of the recombining DNA molecules. Essential
CC       to convert dimers of the bacterial chromosome into monomers to permit
CC       their segregation at cell division. {ECO:0000255|HAMAP-Rule:MF_01816}.
CC   -!- ACTIVITY REGULATION: FtsK is required for recombination.
CC       {ECO:0000255|HAMAP-Rule:MF_01816}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01816}.
CC   -!- SIMILARITY: Belongs to the 'phage' integrase family. XerS subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01816}.
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DR   EMBL; AE005176; AAK05330.1; -; Genomic_DNA.
DR   PIR; H86778; H86778.
DR   RefSeq; NP_267388.1; NC_002662.1.
DR   RefSeq; WP_003131037.1; NC_002662.1.
DR   AlphaFoldDB; Q9CG78; -.
DR   SMR; Q9CG78; -.
DR   STRING; 272623.L57903; -.
DR   PaxDb; Q9CG78; -.
DR   EnsemblBacteria; AAK05330; AAK05330; L57903.
DR   GeneID; 60355148; -.
DR   KEGG; lla:L57903; -.
DR   PATRIC; fig|272623.7.peg.1334; -.
DR   eggNOG; COG4974; Bacteria.
DR   HOGENOM; CLU_027562_9_6_9; -.
DR   OMA; EKNGAHM; -.
DR   Proteomes; UP000002196; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0009037; F:tyrosine-based site-specific recombinase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0007049; P:cell cycle; IEA:UniProtKB-KW.
DR   GO; GO:0051301; P:cell division; IEA:UniProtKB-KW.
DR   GO; GO:0007059; P:chromosome segregation; IEA:UniProtKB-UniRule.
DR   GO; GO:0006310; P:DNA recombination; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.10.150.130; -; 1.
DR   Gene3D; 1.10.443.10; -; 1.
DR   HAMAP; MF_01816; Recomb_XerS; 1.
DR   InterPro; IPR044068; CB.
DR   InterPro; IPR011010; DNA_brk_join_enz.
DR   InterPro; IPR013762; Integrase-like_cat_sf.
DR   InterPro; IPR002104; Integrase_catalytic.
DR   InterPro; IPR010998; Integrase_recombinase_N.
DR   InterPro; IPR004107; Integrase_SAM-like_N.
DR   InterPro; IPR023670; Recomb_XerS.
DR   Pfam; PF13495; Phage_int_SAM_4; 1.
DR   Pfam; PF00589; Phage_integrase; 1.
DR   SUPFAM; SSF56349; SSF56349; 1.
DR   PROSITE; PS51900; CB; 1.
DR   PROSITE; PS51898; TYR_RECOMBINASE; 1.
PE   3: Inferred from homology;
KW   Cell cycle; Cell division; Chromosome partition; Cytoplasm;
KW   DNA integration; DNA recombination; DNA-binding; Reference proteome.
FT   CHAIN           1..356
FT                   /note="Tyrosine recombinase XerS"
FT                   /id="PRO_0000095359"
FT   DOMAIN          16..121
FT                   /note="Core-binding (CB)"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01248"
FT   DOMAIN          169..354
FT                   /note="Tyr recombinase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01246"
FT   ACT_SITE        210
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01816"
FT   ACT_SITE        234
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01816"
FT   ACT_SITE        306
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01816"
FT   ACT_SITE        309
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01816"
FT   ACT_SITE        332
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01816"
FT   ACT_SITE        341
FT                   /note="O-(3'-phospho-DNA)-tyrosine intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01816"
SQ   SEQUENCE   356 AA;  41397 MW;  4A56C4565A474AF9 CRC64;
     MKREQLIQNI EKLKHIMPSY VLEYYQSKLT IPYSLNTLYE YLKEYERFFS WLVDSGVADV
     DKITDVSLSV LENLTKRDLE SFILYLRERP RLNTRSTRYG VSQTTINRTL SALSSLYKYL
     TEEVENEDGE PYFYRNVMKK VQTKKKSETL ASRAENIKGK LFLGDETQGF LDYIDNEYEK
     TLSNRARSSF FKNKERDLAI IALILASGIR LSEAVNVDLR DLNLITMVVE VTRKGGKRDA
     VPYAPFAKTY FERYLEVRSQ RYKTTAKDTA FFVTLYRDVP SRIDPSSVEK LVAKYSQAFK
     VRVTPHKLRH TLATRLYAQT NSQVLVSNQL GHASTQVTDL YTHIINEEQK NALDNL