ID   RNH2_METHJ              Reviewed;         212 AA.
AC   Q2FP80;
DT   30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT   21-MAR-2006, sequence version 1.
DT   03-AUG-2022, entry version 85.
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=Mhun_1216;
OS   Methanospirillum hungatei JF-1 (strain ATCC 27890 / DSM 864 / NBRC 100397 /
OS   JF-1).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanomicrobiales; Methanospirillaceae; Methanospirillum.
OX   NCBI_TaxID=323259;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27890 / DSM 864 / NBRC 100397 / JF-1;
RX   PubMed=26744606; DOI=10.1186/s40793-015-0124-8;
RA   Gunsalus R.P., Cook L.E., Crable B., Rohlin L., McDonald E., Mouttaki H.,
RA   Sieber J.R., Poweleit N., Zhou H., Lapidus A.L., Daligault H.E., Land M.,
RA   Gilna P., Ivanova N., Kyrpides N., Culley D.E., McInerney M.J.;
RT   "Complete genome sequence of Methanospirillum hungatei type strain JF1.";
RL   Stand. Genomic Sci. 11:2-2(2016).
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; CP000254; ABD40963.1; -; Genomic_DNA.
DR   RefSeq; WP_011448240.1; NC_007796.1.
DR   AlphaFoldDB; Q2FP80; -.
DR   SMR; Q2FP80; -.
DR   STRING; 323259.Mhun_1216; -.
DR   EnsemblBacteria; ABD40963; ABD40963; Mhun_1216.
DR   GeneID; 3924248; -.
DR   KEGG; mhu:Mhun_1216; -.
DR   eggNOG; arCOG04121; Archaea.
DR   HOGENOM; CLU_036532_0_4_2; -.
DR   OMA; REECRFF; -.
DR   OrthoDB; 105421at2157; -.
DR   Proteomes; UP000001941; 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   Gene3D; 1.10.10.460; -; 1.
DR   Gene3D; 3.30.420.10; -; 1.
DR   HAMAP; MF_00052_A; RNase_HII_A; 1.
DR   InterPro; IPR004649; RNase_H2_suA.
DR   InterPro; IPR001352; RNase_HII/HIII.
DR   InterPro; IPR024567; RNase_HII/HIII_dom.
DR   InterPro; IPR020787; RNase_HII_arc.
DR   InterPro; IPR023160; RNase_HII_hlx-loop-hlx_cap_dom.
DR   InterPro; IPR012337; RNaseH-like_sf.
DR   InterPro; IPR036397; RNaseH_sf.
DR   PANTHER; PTHR10954; PTHR10954; 1.
DR   Pfam; PF01351; RNase_HII; 1.
DR   SUPFAM; SSF53098; SSF53098; 1.
DR   TIGRFAMs; TIGR00729; TIGR00729; 1.
DR   PROSITE; PS51975; RNASE_H_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endonuclease; Hydrolase; Manganese; Metal-binding; Nuclease;
KW   Reference proteome.
FT   CHAIN           1..212
FT                   /note="Ribonuclease HII"
FT                   /id="PRO_0000236281"
FT   DOMAIN          1..206
FT                   /note="RNase H type-2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01319"
FT   BINDING         6
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
FT   BINDING         7
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
FT   BINDING         101
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
SQ   SEQUENCE   212 AA;  23272 MW;  69DEE63659C10118 CRC64;
     MICGVDEAGK GSVLGPMVVA AVGCTDMDDL IALGVADSKK LSSKSREKIS ADIKAQFPFS
     IVIRTAHDID ELRRTMTMNE IVARSHAEAL IPLNCTCAYV DACDVSEERY EETVSSFSPP
     DCTIVARHKA DSLFPPVSAA SIIAKVERDR IIEELSKEYG DIGSGYPSDP VTITYLTKYI
     RHHNQPPVIA RSSWETVKNL LHQKNQSSLL DF