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RECU_STRA1
ID   RECU_STRA1              Reviewed;         199 AA.
AC   Q3K380;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   08-NOV-2005, sequence version 1.
DT   03-AUG-2022, entry version 92.
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=SAK_0371;
OS   Streptococcus agalactiae serotype Ia (strain ATCC 27591 / A909 / CDC
OS   SS700).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=205921;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27591 / A909 / CDC SS700;
RX   PubMed=16172379; DOI=10.1073/pnas.0506758102;
RA   Tettelin H., Masignani V., Cieslewicz M.J., Donati C., Medini D.,
RA   Ward N.L., Angiuoli S.V., Crabtree J., Jones A.L., Durkin A.S., DeBoy R.T.,
RA   Davidsen T.M., Mora M., Scarselli M., Margarit y Ros I., Peterson J.D.,
RA   Hauser C.R., Sundaram J.P., Nelson W.C., Madupu R., Brinkac L.M.,
RA   Dodson R.J., Rosovitz M.J., Sullivan S.A., Daugherty S.C., Haft D.H.,
RA   Selengut J., Gwinn M.L., Zhou L., Zafar N., Khouri H., Radune D.,
RA   Dimitrov G., Watkins K., O'Connor K.J., Smith S., Utterback T.R., White O.,
RA   Rubens C.E., Grandi G., Madoff L.C., Kasper D.L., Telford J.L.,
RA   Wessels M.R., Rappuoli R., Fraser C.M.;
RT   "Genome analysis of multiple pathogenic isolates of Streptococcus
RT   agalactiae: implications for the microbial 'pan-genome'.";
RL   Proc. Natl. Acad. Sci. U.S.A. 102:13950-13955(2005).
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; CP000114; ABA45918.1; -; Genomic_DNA.
DR   RefSeq; WP_000248792.1; NC_007432.1.
DR   AlphaFoldDB; Q3K380; -.
DR   SMR; Q3K380; -.
DR   GeneID; 66885272; -.
DR   KEGG; sak:SAK_0371; -.
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..199
FT                   /note="Holliday junction resolvase RecU"
FT                   /id="PRO_1000016743"
FT   BINDING         82
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   BINDING         84
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   BINDING         97
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   BINDING         116
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
FT   SITE            99
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00130"
SQ   SEQUENCE   199 AA;  23102 MW;  09947B2B2AD5F6A6 CRC64;
     MVNYPHQLIR KTTVTKSKKK KIDFANRGMS FEAAINATND YYLSHELAVI HKKPTPVQIV
     KVDYPKRSRA KIVEAYFRQA STTDYSGVYK GYYIDFEAKE TRQKTAMPMK NFHAHQIEHM
     ANVLQQKGIC FVLLHFSTLK ETYLLPANEL ISFYQIDKGN KSMPIDYIRK NGFFVKESAF
     PQVPYLDIIE EKLLGGDYN
 
 
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