ID   RNC_FLAPJ               Reviewed;         246 AA.
AC   A6GW45;
DT   18-APR-2012, integrated into UniProtKB/Swiss-Prot.
DT   24-JUL-2007, sequence version 1.
DT   03-AUG-2022, entry version 83.
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=FP0202;
OS   Flavobacterium psychrophilum (strain ATCC 49511 / DSM 21280 / CIP 103535 /
OS   JIP02/86).
OC   Bacteria; Bacteroidetes; Flavobacteriia; Flavobacteriales;
OC   Flavobacteriaceae; Flavobacterium.
OX   NCBI_TaxID=402612;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 49511 / DSM 21280 / CIP 103535 / JIP02/86;
RX   PubMed=17592475; DOI=10.1038/nbt1313;
RA   Duchaud E., Boussaha M., Loux V., Bernardet J.-F., Michel C., Kerouault B.,
RA   Mondot S., Nicolas P., Bossy R., Caron C., Bessieres P., Gibrat J.-F.,
RA   Claverol S., Dumetz F., Le Henaff M., Benmansour A.;
RT   "Complete genome sequence of the fish pathogen Flavobacterium
RT   psychrophilum.";
RL   Nat. Biotechnol. 25:763-769(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; AM398681; CAL42318.1; -; Genomic_DNA.
DR   RefSeq; WP_011962378.1; NC_009613.3.
DR   RefSeq; YP_001295138.1; NC_009613.3.
DR   AlphaFoldDB; A6GW45; -.
DR   SMR; A6GW45; -.
DR   STRING; 402612.FP0202; -.
DR   EnsemblBacteria; CAL42318; CAL42318; FP0202.
DR   GeneID; 66553830; -.
DR   KEGG; fps:FP0202; -.
DR   PATRIC; fig|402612.5.peg.211; -.
DR   eggNOG; COG0571; Bacteria.
DR   HOGENOM; CLU_000907_1_0_10; -.
DR   OMA; LTHKSCK; -.
DR   Proteomes; UP000006394; 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   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; PS50142; RNASE_3_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endonuclease; Hydrolase; Magnesium; Metal-binding;
KW   mRNA processing; Nuclease; Reference proteome; RNA-binding;
KW   rRNA processing; rRNA-binding; tRNA processing.
FT   CHAIN           1..246
FT                   /note="Ribonuclease 3"
FT                   /id="PRO_0000416604"
FT   DOMAIN          20..145
FT                   /note="RNase III"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   DOMAIN          173..241
FT                   /note="DRBM"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        66
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        134
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         62
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         131
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         134
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
SQ   SEQUENCE   246 AA;  28383 MW;  60B4918F1D7C8FD9 CRC64;
     MSFIKKIFLS SRSSEDGLFF SKLEKILGFK PLNLTHFRRA FTHRSMNKLD EKGNPMNYER
     LEFMGDAMLG SVIAAHLFNM SPTGDEGYLT KMRSKIVSRE HLNELGKDLN LIQFLESKVT
     LQNFGENIHG NLFEAFVGAI YLDRGFVYCE KFIHKKVIKP YVDIDKLEGK VISYKSLLIE
     WCQKEKRVFH YDIYEDEDAG KLKYFGVKLS IDGKVVAKAR ATSKKKAEEI ASKRGYFVFQ
     SEIDGK