ID   RNC_PSYIN               Reviewed;         228 AA.
AC   A1SSM8;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   06-FEB-2007, sequence version 1.
DT   04-NOV-2026, entry version 97.
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};
GN   OrderedLocusNames=Ping_0640;
OS   Psychromonas ingrahamii (strain DSM 17664 / CCUG 51855 / 37).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Alteromonadales; Psychromonadaceae; Psychromonas.
OX   NCBI_TaxID=357804;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 17664 / CCUG 51855 / 37;
RX   PubMed=18460197; DOI=10.1186/1471-2164-9-210;
RA   Riley M., Staley J.T., Danchin A., Wang T.Z., Brettin T.S., Hauser L.J.,
RA   Land M.L., Thompson L.S.;
RT   "Genomics of an extreme psychrophile, Psychromonas ingrahamii.";
RL   BMC Genomics 9:210-210(2008).
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; Evidence={ECO:0000255|HAMAP-
CC         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; CP000510; ABM02493.1; -; Genomic_DNA.
DR   RefSeq; WP_011769052.1; NC_008709.1.
DR   AlphaFoldDB; A1SSM8; -.
DR   SMR; A1SSM8; -.
DR   STRING; 357804.Ping_0640; -.
DR   KEGG; pin:Ping_0640; -.
DR   eggNOG; COG0571; Bacteria.
DR   HOGENOM; CLU_000907_1_1_6; -.
DR   OMA; AAEVWFR; -.
DR   OrthoDB; 9805026at2; -.
DR   Proteomes; UP000000639; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003725; F:double-stranded RNA binding; IEA:TreeGrafter.
DR   GO; GO:0042802; F:identical protein binding; IEA:UniProtKB-ARBA.
DR   GO; GO:0004525; F:ribonuclease III activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006397; P:mRNA processing; IEA:UniProtKB-UniRule.
DR   GO; GO:0010468; P:regulation of gene expression; IEA:TreeGrafter.
DR   GO; GO:0006364; P:rRNA processing; IEA:UniProtKB-UniRule.
DR   CDD; cd10845; DSRM_RNAse_III_family; 1.
DR   CDD; cd00593; RIBOc; 1.
DR   FunFam; 1.10.1520.10:FF:000001; Ribonuclease 3; 1.
DR   FunFam; 3.30.160.20:FF:000003; Ribonuclease 3; 1.
DR   Gene3D; 3.30.160.20; -; 1.
DR   Gene3D; 1.10.1520.10; Ribonuclease III domain; 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   NCBIfam; TIGR02191; RNaseIII; 1.
DR   PANTHER; PTHR11207:SF0; RIBONUCLEASE 3; 1.
DR   PANTHER; PTHR11207; RIBONUCLEASE III; 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; SSF54768; dsRNA-binding domain-like; 1.
DR   SUPFAM; SSF69065; RNase III domain-like; 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; Reference proteome; RNA-binding;
KW   rRNA processing; rRNA-binding; tRNA processing.
FT   CHAIN           1..228
FT                   /note="Ribonuclease 3"
FT                   /id="PRO_1000075792"
FT   DOMAIN          8..130
FT                   /note="RNase III"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   DOMAIN          157..226
FT                   /note="DRBM"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        47
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   ACT_SITE        119
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
FT   BINDING         43
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"
FT   BINDING         119
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00104"
SQ   SEQUENCE   228 AA;  25516 MW;  9C52B00FD2A862D6 CRC64;
     MMIKQAELKR LERRVDYTFS DFSLLQQALT HRSALGNHNE RLEFLGDSIL SYAISTDLYA
     RFPKVDEGDL SRMRATLVCG KMLAEIGREF QLGDCLILGP GELKSGGFRR DSIIADGVEA
     IIGAAFLDSD IDTVKKLILK WFDSRLNTIE PGISQKDPKT RLQEHLQSRK QPLPIYEVLE
     IKGEAHNQRF TMSCSIDGLK SVQGQGTSRR KAEQIAANKM LDSLSGAK
//