ID   RECU_STRPQ              Reviewed;         202 AA.
AC   P0DD91; P65997; Q8NZZ0;
DT   27-JUL-2011, integrated into UniProtKB/Swiss-Prot.
DT   27-JUL-2011, sequence version 1.
DT   03-AUG-2022, entry version 56.
DE   RecName: Full=Holliday junction resolvase RecU {ECO:0000255|HAMAP-Rule:MF_00130};
DE            EC=3.1.21.10 {ECO:0000255|HAMAP-Rule:MF_00130};
DE   AltName: Full=Recombination protein U homolog {ECO:0000255|HAMAP-Rule:MF_00130};
GN   Name=recU {ECO:0000255|HAMAP-Rule:MF_00130}; OrderedLocusNames=SPs0473;
OS   Streptococcus pyogenes serotype M3 (strain SSI-1).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=193567;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SSI-1;
RX   PubMed=12799345; DOI=10.1101/gr.1096703;
RA   Nakagawa I., Kurokawa K., Yamashita A., Nakata M., Tomiyasu Y.,
RA   Okahashi N., Kawabata S., Yamazaki K., Shiba T., Yasunaga T., Hayashi H.,
RA   Hattori M., Hamada S.;
RT   "Genome sequence of an M3 strain of Streptococcus pyogenes reveals a large-
RT   scale genomic rearrangement in invasive strains and new insights into phage
RT   evolution.";
RL   Genome Res. 13:1042-1055(2003).
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. {ECO:0000255|HAMAP-
CC       Rule:MF_00130}.
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;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00130};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00130};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00130}.
CC   -!- SIMILARITY: Belongs to the RecU family. {ECO:0000255|HAMAP-
CC       Rule:MF_00130}.
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DR   EMBL; BA000034; BAC63568.1; -; Genomic_DNA.
DR   RefSeq; WP_002983622.1; NC_004606.1.
DR   AlphaFoldDB; P0DD91; -.
DR   SMR; P0DD91; -.
DR   GeneID; 57853048; -.
DR   KEGG; sps:SPs0473; -.
DR   HOGENOM; CLU_096340_0_0_9; -.
DR   OMA; TDYNGIY; -.
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..202
FT                   /note="Holliday junction resolvase RecU"
FT                   /id="PRO_0000411485"
FT   BINDING         85
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   BINDING         87
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   BINDING         100
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   BINDING         119
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   SITE            102
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
SQ   SEQUENCE   202 AA;  23357 MW;  BD001AB6430560F7 CRC64;
     MVNYPHNLIR QKVSSVQKQT KQNKVDFANR GMSFEAAINA TNDYYLSRQI AVIHKKPTPV
     QIVKVDYPKR SRAKIVEAYF RQASTTDYCG VYKGHYVDFE AKETRQKTAM PMKNFHLHQI
     EHMACVLHQK GICFVLLHFS TLKETYYLPA QALISFYQID NGSKSMPIDY IRKNGFKVAF
     GAFPQVPYLN IIEQNFLGGD YN