ID   RNC_CAMJ8               Reviewed;         224 AA.
AC   A8FNU7;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   03-AUG-2022, entry version 73.
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=C8J_1537;
OS   Campylobacter jejuni subsp. jejuni serotype O:6 (strain 81116 / NCTC
OS   11828).
OC   Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC   Campylobacteraceae; Campylobacter.
OX   NCBI_TaxID=407148;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=81116 / NCTC 11828;
RX   PubMed=17873037; DOI=10.1128/jb.01404-07;
RA   Pearson B.M., Gaskin D.J.H., Segers R.P.A.M., Wells J.M., Nuijten P.J.M.,
RA   van Vliet A.H.M.;
RT   "The complete genome sequence of Campylobacter jejuni strain 81116
RT   (NCTC11828).";
RL   J. Bacteriol. 189:8402-8403(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; CP000814; ABV53134.1; -; Genomic_DNA.
DR   RefSeq; WP_002862275.1; NC_009839.1.
DR   AlphaFoldDB; A8FNU7; -.
DR   SMR; A8FNU7; -.
DR   KEGG; cju:C8J_1537; -.
DR   HOGENOM; CLU_000907_1_3_7; -.
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   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..224
FT                   /note="Ribonuclease 3"
FT                   /id="PRO_1000075735"
FT   DOMAIN          4..127
FT                   /note="RNase III"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   DOMAIN          154..223
FT                   /note="DRBM"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        44
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        116
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         40
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         113
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         116
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
SQ   SEQUENCE   224 AA;  24998 MW;  421499919A3B17CA CRC64;
     MKNIEKLEQS LTYEFKDKNL LIHALTHKSF KKSYNNERLE FLGDAVLDLV VGEYLFHKFA
     KDAEGDLSKL RAALVNEKSF AKIANSLNLG DFIFMSVAEE NNGGKEKPSI LSDALEAIIG
     AIHLEAGFEF AKTIALRLIE KNFPQIDAKI LIKDYKTKLQ EITQGKIGQT PQYETVRAFG
     PDHLKQFEIA LMLDGKELAR AIAGSKKEAQ QMAAKIALEK LGAL