ID   RECU_LISIN              Reviewed;         201 AA.
AC   Q92AB7;
DT   26-JUL-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 107.
DE   RecName: Full=Holliday junction resolvase RecU;
DE            EC=3.1.21.10 {ECO:0000255|HAMAP-Rule:MF_00130};
DE   AltName: Full=Recombination protein U homolog;
GN   Name=recU; OrderedLocusNames=lin2005;
OS   Listeria innocua serovar 6a (strain ATCC BAA-680 / CLIP 11262).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Listeriaceae; Listeria.
OX   NCBI_TaxID=272626;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-680 / CLIP 11262;
RX   PubMed=11679669; DOI=10.1126/science.1063447;
RA   Glaser P., Frangeul L., Buchrieser C., Rusniok C., Amend A., Baquero F.,
RA   Berche P., Bloecker H., Brandt P., Chakraborty T., Charbit A.,
RA   Chetouani F., Couve E., de Daruvar A., Dehoux P., Domann E.,
RA   Dominguez-Bernal G., Duchaud E., Durant L., Dussurget O., Entian K.-D.,
RA   Fsihi H., Garcia-del Portillo F., Garrido P., Gautier L., Goebel W.,
RA   Gomez-Lopez N., Hain T., Hauf J., Jackson D., Jones L.-M., Kaerst U.,
RA   Kreft J., Kuhn M., Kunst F., Kurapkat G., Madueno E., Maitournam A.,
RA   Mata Vicente J., Ng E., Nedjari H., Nordsiek G., Novella S., de Pablos B.,
RA   Perez-Diaz J.-C., Purcell R., Remmel B., Rose M., Schlueter T., Simoes N.,
RA   Tierrez A., Vazquez-Boland J.-A., Voss H., Wehland J., Cossart P.;
RT   "Comparative genomics of Listeria species.";
RL   Science 294:849-852(2001).
CC   -!- FUNCTION: Endonuclease that resolves Holliday junction intermediates in
CC       genetic recombination. Cleaves mobile four-strand junctions by
CC       introducing symmetrical nicks in paired strands. Promotes annealing of
CC       linear ssDNA with homologous dsDNA. Required for DNA repair, homologous
CC       recombination and chromosome segregation (By similarity).
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage at a junction such as a reciprocal
CC         single-stranded crossover between two homologous DNA duplexes
CC         (Holliday junction).; EC=3.1.21.10; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00130};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000250};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the RecU family. {ECO:0000305}.
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DR   EMBL; AL596170; CAC97235.1; -; Genomic_DNA.
DR   PIR; AC1683; AC1683.
DR   RefSeq; WP_003769387.1; NC_003212.1.
DR   AlphaFoldDB; Q92AB7; -.
DR   SMR; Q92AB7; -.
DR   STRING; 272626.lin2005; -.
DR   EnsemblBacteria; CAC97235; CAC97235; CAC97235.
DR   GeneID; 61171508; -.
DR   KEGG; lin:recU; -.
DR   eggNOG; COG3331; Bacteria.
DR   HOGENOM; CLU_096340_0_0_9; -.
DR   OMA; TDYNGIY; -.
DR   OrthoDB; 1756221at2; -.
DR   Proteomes; UP000002513; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0008821; F:crossover junction endodeoxyribonuclease activity; IEA:UniProtKB-EC.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003676; F:nucleic acid binding; IEA:InterPro.
DR   GO; GO:0007059; P:chromosome segregation; IEA:UniProtKB-UniRule.
DR   GO; GO:0006310; P:DNA recombination; IEA:UniProtKB-UniRule.
DR   GO; GO:0006281; P:DNA repair; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.1350.10; -; 1.
DR   HAMAP; MF_00130; RecU; 1.
DR   InterPro; IPR004612; Resolv_RecU.
DR   InterPro; IPR011335; Restrct_endonuc-II-like.
DR   InterPro; IPR011856; tRNA_endonuc-like_dom_sf.
DR   Pfam; PF03838; RecU; 1.
DR   PIRSF; PIRSF037785; RecU; 1.
DR   SUPFAM; SSF52980; SSF52980; 1.
DR   TIGRFAMs; TIGR00648; recU; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; DNA damage; DNA recombination; DNA repair; Endonuclease;
KW   Hydrolase; Magnesium; Metal-binding; Nuclease.
FT   CHAIN           1..201
FT                   /note="Holliday junction resolvase RecU"
FT                   /id="PRO_0000212299"
FT   BINDING         87
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         89
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         102
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         121
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   SITE            104
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   201 AA;  22961 MW;  B4D0AC3F4A2EE18C CRC64;
     MAIGYPGGKK YTASHEGLPS KKRKTPVTYG KRGMSLEDDL NDTIAYYLAH DIAVIHKKPT
     PVQIVSVDYP KRSSAKIKEA YFKTPSTTDY NGVYKGKYVD FEAKETQNTT SFPLSNFHDH
     QMTHMANVLK QDGIVFVIIA FQKLGETHFI PFEKFYPFWE RMQSGGRKSV TISEIQDVSD
     QVPYGLNPRL DFLQSIDKLY F