ID   RNH_ECO81               Reviewed;         155 AA.
AC   B7MQ23;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   24-MAR-2009, sequence version 1.
DT   03-AUG-2022, entry version 64.
DE   RecName: Full=Ribonuclease H {ECO:0000255|HAMAP-Rule:MF_00042};
DE            Short=RNase H {ECO:0000255|HAMAP-Rule:MF_00042};
DE            EC=3.1.26.4 {ECO:0000255|HAMAP-Rule:MF_00042};
GN   Name=rnhA {ECO:0000255|HAMAP-Rule:MF_00042}; OrderedLocusNames=ECED1_0219;
OS   Escherichia coli O81 (strain ED1a).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=585397;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ED1a;
RX   PubMed=19165319; DOI=10.1371/journal.pgen.1000344;
RA   Touchon M., Hoede C., Tenaillon O., Barbe V., Baeriswyl S., Bidet P.,
RA   Bingen E., Bonacorsi S., Bouchier C., Bouvet O., Calteau A., Chiapello H.,
RA   Clermont O., Cruveiller S., Danchin A., Diard M., Dossat C., Karoui M.E.,
RA   Frapy E., Garry L., Ghigo J.M., Gilles A.M., Johnson J., Le Bouguenec C.,
RA   Lescat M., Mangenot S., Martinez-Jehanne V., Matic I., Nassif X., Oztas S.,
RA   Petit M.A., Pichon C., Rouy Z., Ruf C.S., Schneider D., Tourret J.,
RA   Vacherie B., Vallenet D., Medigue C., Rocha E.P.C., Denamur E.;
RT   "Organised genome dynamics in the Escherichia coli species results in
RT   highly diverse adaptive paths.";
RL   PLoS Genet. 5:E1000344-E1000344(2009).
CC   -!- FUNCTION: Endonuclease that specifically degrades the RNA of RNA-DNA
CC       hybrids. {ECO:0000255|HAMAP-Rule:MF_00042}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00042};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00042};
CC       Note=Binds 1 Mg(2+) ion per subunit. May bind a second metal ion at a
CC       regulatory site, or after substrate binding. {ECO:0000255|HAMAP-
CC       Rule:MF_00042};
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_00042}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00042}.
CC   -!- SIMILARITY: Belongs to the RNase H family. {ECO:0000255|HAMAP-
CC       Rule:MF_00042}.
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DR   EMBL; CU928162; CAR06435.1; -; Genomic_DNA.
DR   RefSeq; WP_000917883.1; NC_011745.1.
DR   AlphaFoldDB; B7MQ23; -.
DR   SMR; B7MQ23; -.
DR   EnsemblBacteria; CAR06435; CAR06435; ECED1_0219.
DR   GeneID; 66671496; -.
DR   KEGG; ecq:ECED1_0219; -.
DR   HOGENOM; CLU_030894_6_0_6; -.
DR   OMA; MQEIEIF; -.
DR   Proteomes; UP000000748; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003676; F:nucleic acid binding; IEA:InterPro.
DR   GO; GO:0004523; F:RNA-DNA hybrid ribonuclease activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006401; P:RNA catabolic process; IEA:UniProtKB-UniRule.
DR   CDD; cd09278; RNase_HI_prokaryote_like; 1.
DR   Gene3D; 3.30.420.10; -; 1.
DR   HAMAP; MF_00042; RNase_H; 1.
DR   InterPro; IPR012337; RNaseH-like_sf.
DR   InterPro; IPR002156; RNaseH_domain.
DR   InterPro; IPR036397; RNaseH_sf.
DR   InterPro; IPR022892; RNaseHI.
DR   Pfam; PF00075; RNase_H; 1.
DR   SUPFAM; SSF53098; SSF53098; 1.
DR   PROSITE; PS50879; RNASE_H_1; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endonuclease; Hydrolase; Magnesium; Metal-binding; Nuclease.
FT   CHAIN           1..155
FT                   /note="Ribonuclease H"
FT                   /id="PRO_1000194434"
FT   DOMAIN          1..142
FT                   /note="RNase H type-1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00408"
FT   BINDING         10
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00042"
FT   BINDING         10
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00042"
FT   BINDING         48
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00042"
FT   BINDING         70
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00042"
FT   BINDING         134
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00042"
SQ   SEQUENCE   155 AA;  17597 MW;  B8EF81EEB2F94CBE CRC64;
     MLKQVEIFTD GSCLGNPGPG GYGAILRYRG REKTFSAGYT RTTNNRMELM AAIVALEALK
     EHCEVILSTD SQYVRQGITQ WIHNWKKRGW KTADKKPVKN VDLWQRLDAA LGQHQIKWEW
     VKGHAGHPEN ERCDELARAA AMNPTLEDTG YQVEV