ID   RNC_STAAM               Reviewed;         243 AA.
AC   Q931T1;
DT   30-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 113.
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=SAV1233;
OS   Staphylococcus aureus (strain Mu50 / ATCC 700699).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC   Staphylococcus.
OX   NCBI_TaxID=158878;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Mu50 / ATCC 700699;
RX   PubMed=11418146; DOI=10.1016/s0140-6736(00)04403-2;
RA   Kuroda M., Ohta T., Uchiyama I., Baba T., Yuzawa H., Kobayashi I., Cui L.,
RA   Oguchi A., Aoki K., Nagai Y., Lian J.-Q., Ito T., Kanamori M.,
RA   Matsumaru H., Maruyama A., Murakami H., Hosoyama A., Mizutani-Ui Y.,
RA   Takahashi N.K., Sawano T., Inoue R., Kaito C., Sekimizu K., Hirakawa H.,
RA   Kuhara S., Goto S., Yabuzaki J., Kanehisa M., Yamashita A., Oshima K.,
RA   Furuya K., Yoshino C., Shiba T., Hattori M., Ogasawara N., Hayashi H.,
RA   Hiramatsu K.;
RT   "Whole genome sequencing of meticillin-resistant Staphylococcus aureus.";
RL   Lancet 357:1225-1240(2001).
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; BA000017; BAB57395.1; -; Genomic_DNA.
DR   RefSeq; WP_000043238.1; NC_002758.2.
DR   AlphaFoldDB; Q931T1; -.
DR   SMR; Q931T1; -.
DR   PaxDb; Q931T1; -.
DR   EnsemblBacteria; BAB57395; BAB57395; SAV1233.
DR   KEGG; sav:SAV1233; -.
DR   HOGENOM; CLU_000907_1_3_9; -.
DR   OMA; LTHKSCK; -.
DR   PhylomeDB; Q931T1; -.
DR   BioCyc; SAUR158878:SAV_RS06645-MON; -.
DR   Proteomes; UP000002481; Chromosome.
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..243
FT                   /note="Ribonuclease 3"
FT                   /id="PRO_0000180433"
FT   DOMAIN          10..146
FT                   /note="RNase III"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   DOMAIN          172..241
FT                   /note="DRBM"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   REGION          219..243
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        219..233
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        63
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        135
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         59
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         132
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         135
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
SQ   SEQUENCE   243 AA;  27921 MW;  87503968BC3455A9 CRC64;
     MSKQKKSEIV NRFRKRFDTK MTELGFTYQN IDLYQQAFSH SSFINDFNMN RLDHNERLEF
     LGDAVLELTV SRYLFDKHPN LPEGNLTKMR ATIVCEPSLV IFANKIGLNE MILLGKGEEK
     TGGRTRPSLI SDAFEAFIGA LYLDQGLDIV WKFAEKVIFP HVEQNELLGV VDFKTQFQEY
     VHQQNKGDVT YNLIKEEGPA HHRLFTSEVI LQGEAIAEGK GKTKKESEQR AAKSAYKQLK
     QIK