ID   RNH2_STRP3              Reviewed;         263 AA.
AC   P0DF16; Q8K7G7;
DT   27-JUL-2011, integrated into UniProtKB/Swiss-Prot.
DT   27-JUL-2011, sequence version 1.
DT   03-AUG-2022, entry version 50.
DE   RecName: Full=Ribonuclease HII {ECO:0000255|HAMAP-Rule:MF_00052};
DE            Short=RNase HII {ECO:0000255|HAMAP-Rule:MF_00052};
DE            EC=3.1.26.4 {ECO:0000255|HAMAP-Rule:MF_00052};
GN   Name=rnhB {ECO:0000255|HAMAP-Rule:MF_00052}; OrderedLocusNames=SpyM3_0818;
OS   Streptococcus pyogenes serotype M3 (strain ATCC BAA-595 / MGAS315).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=198466;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-595 / MGAS315;
RX   PubMed=12122206; DOI=10.1073/pnas.152298499;
RA   Beres S.B., Sylva G.L., Barbian K.D., Lei B., Hoff J.S., Mammarella N.D.,
RA   Liu M.-Y., Smoot J.C., Porcella S.F., Parkins L.D., Campbell D.S.,
RA   Smith T.M., McCormick J.K., Leung D.Y.M., Schlievert P.M., Musser J.M.;
RT   "Genome sequence of a serotype M3 strain of group A Streptococcus: phage-
RT   encoded toxins, the high-virulence phenotype, and clone emergence.";
RL   Proc. Natl. Acad. Sci. U.S.A. 99:10078-10083(2002).
CC   -!- FUNCTION: Endonuclease that specifically degrades the RNA of RNA-DNA
CC       hybrids. {ECO:0000255|HAMAP-Rule:MF_00052}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00052};
CC   -!- COFACTOR:
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00052};
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00052};
CC       Note=Manganese or magnesium. Binds 1 divalent metal ion per monomer in
CC       the absence of substrate. May bind a second metal ion after substrate
CC       binding. {ECO:0000255|HAMAP-Rule:MF_00052};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00052}.
CC   -!- SIMILARITY: Belongs to the RNase HII family. {ECO:0000255|HAMAP-
CC       Rule:MF_00052}.
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DR   EMBL; AE014074; AAM79425.1; -; Genomic_DNA.
DR   RefSeq; WP_011054500.1; NC_004070.1.
DR   AlphaFoldDB; P0DF16; -.
DR   SMR; P0DF16; -.
DR   EnsemblBacteria; AAM79425; AAM79425; SpyM3_0818.
DR   KEGG; spg:SpyM3_0818; -.
DR   HOGENOM; CLU_036532_2_1_9; -.
DR   OMA; YPTKLHL; -.
DR   Proteomes; UP000000564; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0030145; F:manganese ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003723; F:RNA 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; cd07182; RNase_HII_bacteria_HII_like; 1.
DR   Gene3D; 3.30.420.10; -; 1.
DR   HAMAP; MF_00052_B; RNase_HII_B; 1.
DR   InterPro; IPR022898; RNase_HII.
DR   InterPro; IPR001352; RNase_HII/HIII.
DR   InterPro; IPR024567; RNase_HII/HIII_dom.
DR   InterPro; IPR012337; RNaseH-like_sf.
DR   InterPro; IPR036397; RNaseH_sf.
DR   PANTHER; PTHR10954; PTHR10954; 1.
DR   PANTHER; PTHR10954:SF18; PTHR10954:SF18; 1.
DR   Pfam; PF01351; RNase_HII; 1.
DR   SUPFAM; SSF53098; SSF53098; 1.
DR   PROSITE; PS51975; RNASE_H_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endonuclease; Hydrolase; Manganese; Metal-binding; Nuclease.
FT   CHAIN           1..263
FT                   /note="Ribonuclease HII"
FT                   /id="PRO_0000111637"
FT   DOMAIN          71..262
FT                   /note="RNase H type-2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01319"
FT   BINDING         77
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
FT   BINDING         78
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
FT   BINDING         172
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
SQ   SEQUENCE   263 AA;  28709 MW;  FDC1462D7C9C3897 CRC64;
     MPTSIKAIKE SLEAVTSLLD PLFQELATDT RSGVQKALKS RQKAIQADLA EEERLEAMLS
     YEKALYKEGY QAIAGIDEVG RGPLAGPVVA ACVILPQHCK IKGLNDSKKI PKAKHETIYQ
     AVKEKALAIG IGIIDNQLID EVNIYEATKL AMLEAIKQLE GQLTQPDYLL IDAMTLDIAI
     SQQSILKGDA NSLSIAAASI VAKVTRDQMM ANYDRIFPGY GFAKNAGYGT KEHLQELKAY
     GITPIHRKSF EPVKSMCCDS TNP