ID   RECU_MYCGE              Reviewed;         166 AA.
AC   Q49422;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   03-AUG-2022, entry version 117.
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=MG352;
OS   Mycoplasma genitalium (strain ATCC 33530 / DSM 19775 / NCTC 10195 / G37)
OS   (Mycoplasmoides genitalium).
OC   Bacteria; Tenericutes; Mollicutes; Mycoplasmataceae; Mycoplasma.
OX   NCBI_TaxID=243273;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33530 / DSM 19775 / NCTC 10195 / G37;
RX   PubMed=7569993; DOI=10.1126/science.270.5235.397;
RA   Fraser C.M., Gocayne J.D., White O., Adams M.D., Clayton R.A.,
RA   Fleischmann R.D., Bult C.J., Kerlavage A.R., Sutton G.G., Kelley J.M.,
RA   Fritchman J.L., Weidman J.F., Small K.V., Sandusky M., Fuhrmann J.L.,
RA   Nguyen D.T., Utterback T.R., Saudek D.M., Phillips C.A., Merrick J.M.,
RA   Tomb J.-F., Dougherty B.A., Bott K.F., Hu P.-C., Lucier T.S.,
RA   Peterson S.N., Smith H.O., Hutchison C.A. III, Venter J.C.;
RT   "The minimal gene complement of Mycoplasma genitalium.";
RL   Science 270:397-403(1995).
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; L43967; AAC71577.1; -; Genomic_DNA.
DR   PIR; I64238; I64238.
DR   RefSeq; WP_009885810.1; NZ_AAGX01000006.1.
DR   AlphaFoldDB; Q49422; -.
DR   SMR; Q49422; -.
DR   STRING; 243273.MG_352; -.
DR   EnsemblBacteria; AAC71577; AAC71577; MG_352.
DR   KEGG; mge:MG_352; -.
DR   eggNOG; COG3331; Bacteria.
DR   HOGENOM; CLU_096340_2_0_14; -.
DR   OMA; TDYNGIY; -.
DR   OrthoDB; 1756221at2; -.
DR   BioCyc; MGEN243273:G1GJ2-443-MON; -.
DR   BRENDA; 3.1.21.10; 3528.
DR   Proteomes; UP000000807; 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   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; Reference proteome.
FT   CHAIN           1..166
FT                   /note="Holliday junction resolvase RecU"
FT                   /id="PRO_0000212318"
FT   BINDING         57
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         70
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         88
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   SITE            72
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   166 AA;  19382 MW;  6ACB82A007156C76 CRC64;
     MINANRGMLL ETIVNQTIAR LKDHPDIWLE KRFLPIKPIA FRHAHVSGNV SQKSKTDYYG
     IYKGMYFDFE AKQTNKSNFP IAQIAEHQLN HLKRIDQIGG VSFLLIYFQT KDQIFAFHTK
     DLLETIKNQE SKTIKRELIE QKSQKVPLLY PGIIDLISII QSFKNY