ID   RNC2_NOSS1              Reviewed;         242 AA.
AC   Q8YPT4;
DT   18-APR-2012, integrated into UniProtKB/Swiss-Prot.
DT   18-APR-2012, sequence version 2.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=Ribonuclease 3 2;
DE            EC=3.1.26.3;
DE   AltName: Full=Ribonuclease III 2;
DE            Short=RNase III 2;
GN   Name=rnc2; OrderedLocusNames=all4107;
OS   Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=103690;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA   Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA   Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA   Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT   "Complete genomic sequence of the filamentous nitrogen-fixing
RT   cyanobacterium Anabaena sp. strain PCC 7120.";
RL   DNA Res. 8:205-213(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 (By similarity).
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.3;
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC   -!- SUBUNIT: Homodimer. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the ribonuclease III family. {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAB75806.1; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305};
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; BA000019; BAB75806.1; ALT_INIT; Genomic_DNA.
DR   PIR; AD2319; AD2319.
DR   RefSeq; WP_044522089.1; NZ_RSCN01000010.1.
DR   AlphaFoldDB; Q8YPT4; -.
DR   SMR; Q8YPT4; -.
DR   STRING; 103690.17133242; -.
DR   PRIDE; Q8YPT4; -.
DR   EnsemblBacteria; BAB75806; BAB75806; BAB75806.
DR   KEGG; ana:all4107; -.
DR   eggNOG; COG0571; Bacteria.
DR   OrthoDB; 1890943at2; -.
DR   Proteomes; UP000002483; 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; PF00636; Ribonuclease_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; Reference proteome; RNA-binding;
KW   rRNA processing; rRNA-binding; tRNA processing.
FT   CHAIN           1..242
FT                   /note="Ribonuclease 3 2"
FT                   /id="PRO_0000416610"
FT   DOMAIN          12..137
FT                   /note="RNase III"
FT   DOMAIN          165..235
FT                   /note="DRBM"
FT   ACT_SITE        55
FT                   /evidence="ECO:0000255"
FT   ACT_SITE        126
FT                   /evidence="ECO:0000250"
FT   BINDING         51
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         123
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         126
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   242 AA;  27052 MW;  9DF81DA20D1CA37F CRC64;
     MTLVYPRRQR QLESLVRKLG LPITAPIKWE LLDLALTHPT VSESANYEQL EFVGDAVVRL
     AAAVMLWETY PDCPVGDFAA IRSVLVSDRI LAQLAREYGL ELHLLVAGSA TSDKIGQESR
     LADAFEAVLG ALYLSTSNLE LIRPWLDHHF RQLAAEIRLD PARLNYKAAL QEWTQAQFKV
     LPEYRVVEIN QANRTQERFA AEVWLHGNKL GEGKGRSIKA AEQAAAKVAF LAITPPEEIA
     NQ