ID   RNC_STRPG               Reviewed;         230 AA.
AC   A2RFW8;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   06-MAR-2007, sequence version 1.
DT   03-AUG-2022, entry version 82.
DE   RecName: Full=Ribonuclease 3 {ECO:0000255|HAMAP-Rule:MF_00104};
DE            EC=3.1.26.3 {ECO:0000255|HAMAP-Rule:MF_00104};
DE   AltName: Full=Ribonuclease III {ECO:0000255|HAMAP-Rule:MF_00104};
DE            Short=RNase III {ECO:0000255|HAMAP-Rule:MF_00104};
GN   Name=rnc {ECO:0000255|HAMAP-Rule:MF_00104}; OrderedLocusNames=SpyM51426;
OS   Streptococcus pyogenes serotype M5 (strain Manfredo).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=160491;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Manfredo;
RX   PubMed=17012393; DOI=10.1128/jb.01227-06;
RA   Holden M.T.G., Scott A., Cherevach I., Chillingworth T., Churcher C.,
RA   Cronin A., Dowd L., Feltwell T., Hamlin N., Holroyd S., Jagels K.,
RA   Moule S., Mungall K., Quail M.A., Price C., Rabbinowitsch E., Sharp S.,
RA   Skelton J., Whitehead S., Barrell B.G., Kehoe M., Parkhill J.;
RT   "Complete genome of acute rheumatic fever-associated serotype M5
RT   Streptococcus pyogenes strain Manfredo.";
RL   J. Bacteriol. 189:1473-1477(2007).
CC   -!- FUNCTION: Digests double-stranded RNA. Involved in the processing of
CC       primary rRNA transcript to yield the immediate precursors to the large
CC       and small rRNAs (23S and 16S). Processes some mRNAs, and tRNAs when
CC       they are encoded in the rRNA operon. Processes pre-crRNA and tracrRNA
CC       of type II CRISPR loci if present in the organism. {ECO:0000255|HAMAP-
CC       Rule:MF_00104}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.3;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00104};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00104};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00104}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00104}.
CC   -!- SIMILARITY: Belongs to the ribonuclease III family. {ECO:0000255|HAMAP-
CC       Rule:MF_00104}.
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DR   EMBL; AM295007; CAM30747.1; -; Genomic_DNA.
DR   RefSeq; WP_002985639.1; NC_009332.1.
DR   AlphaFoldDB; A2RFW8; -.
DR   SMR; A2RFW8; -.
DR   KEGG; spf:SpyM51426; -.
DR   HOGENOM; CLU_000907_1_3_9; -.
DR   OMA; LTHKSCK; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0004525; F:ribonuclease III activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019843; F:rRNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0006397; P:mRNA processing; IEA:UniProtKB-UniRule.
DR   GO; GO:0006364; P:rRNA processing; IEA:UniProtKB-UniRule.
DR   GO; GO:0008033; P:tRNA processing; IEA:UniProtKB-KW.
DR   CDD; cd00593; RIBOc; 1.
DR   Gene3D; 1.10.1520.10; -; 1.
DR   HAMAP; MF_00104; RNase_III; 1.
DR   InterPro; IPR014720; dsRBD_dom.
DR   InterPro; IPR011907; RNase_III.
DR   InterPro; IPR000999; RNase_III_dom.
DR   InterPro; IPR036389; RNase_III_sf.
DR   PANTHER; PTHR11207; PTHR11207; 1.
DR   Pfam; PF00035; dsrm; 1.
DR   Pfam; PF14622; Ribonucleas_3_3; 1.
DR   SMART; SM00358; DSRM; 1.
DR   SMART; SM00535; RIBOc; 1.
DR   SUPFAM; SSF69065; SSF69065; 1.
DR   TIGRFAMs; TIGR02191; RNaseIII; 1.
DR   PROSITE; PS50137; DS_RBD; 1.
DR   PROSITE; PS00517; RNASE_3_1; 1.
DR   PROSITE; PS50142; RNASE_3_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endonuclease; Hydrolase; Magnesium; Metal-binding;
KW   mRNA processing; Nuclease; RNA-binding; rRNA processing; rRNA-binding;
KW   tRNA processing.
FT   CHAIN           1..230
FT                   /note="Ribonuclease 3"
FT                   /id="PRO_1000075839"
FT   DOMAIN          1..134
FT                   /note="RNase III"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   DOMAIN          160..229
FT                   /note="DRBM"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        51
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        123
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         47
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         120
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         123
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
SQ   SEQUENCE   230 AA;  25876 MW;  D0107D9055B58273 CRC64;
     MKQLEELLST SFDIQFNDLT LLETAFTHTS YANEHRLLNV SHNERLEFLG DAVLQLIISE
     YLFAKYPKKT EGDMSKLRSM IVREESLAGF SRFCSFDAYI KLGKGEEKSG GRRRDTILGD
     LFEAFLGALL LDKGIDAVRR FLKQVMIPQV EKGNFERVKD YKTCLQEFLQ TKGDVVIDYQ
     VISEKGPAHA KQFEVSIVVN GAVLSKGLGK SKKLAEQDAA KNALAQLSEV