ID A0A077JD54_9CYAN Unreviewed; 159 AA.
AC A0A077JD54;
DT 29-OCT-2014, integrated into UniProtKB/TrEMBL.
DT 29-OCT-2014, sequence version 1.
DT 24-JAN-2024, entry version 30.
DE RecName: Full=Mini-ribonuclease 3 {ECO:0000256|HAMAP-Rule:MF_01468};
DE Short=Mini-3 {ECO:0000256|HAMAP-Rule:MF_01468};
DE Short=Mini-RNase 3 {ECO:0000256|HAMAP-Rule:MF_01468};
DE EC=3.1.26.- {ECO:0000256|HAMAP-Rule:MF_01468};
DE AltName: Full=Mini-RNase III {ECO:0000256|HAMAP-Rule:MF_01468};
DE Short=Mini-III {ECO:0000256|HAMAP-Rule:MF_01468};
GN Name=mrnC {ECO:0000256|HAMAP-Rule:MF_01468};
GN ORFNames=ETSB_0154 {ECO:0000313|EMBL:BAP17045.1};
OS cyanobacterium endosymbiont of Epithemia turgida isolate EtSB Lake Yunoko.
OC Bacteria; Cyanobacteriota.
OX NCBI_TaxID=1228987 {ECO:0000313|EMBL:BAP17045.1, ECO:0000313|Proteomes:UP000031625};
RN [1] {ECO:0000313|EMBL:BAP17045.1, ECO:0000313|Proteomes:UP000031625}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ETSB Lake Yunoko {ECO:0000313|EMBL:BAP17045.1};
RX PubMed=25049384; DOI=10.1073/pnas.1405222111;
RA Nakayama T., Kamikawa R., Tanifuji G., Kashiyama Y., Ohkouchi N.,
RA Archibald J.M., Inagaki Y.;
RT "Complete genome of a nonphotosynthetic cyanobacterium in a diatom reveals
RT recent adaptations to an intracellular lifestyle.";
RL Proc. Natl. Acad. Sci. U.S.A. 111:11407-11412(2014).
CC -!- FUNCTION: Involved in correct processing of both the 5' and 3' ends of
CC 23S rRNA precursor. Processes 30S rRNA precursor transcript even in
CC absence of ribonuclease 3 (Rnc); Rnc processes 30S rRNA into smaller
CC rRNA precursors. {ECO:0000256|HAMAP-Rule:MF_01468}.
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01468};
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01468}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01468}.
CC -!- SIMILARITY: Belongs to the MrnC RNase family. {ECO:0000256|HAMAP-
CC Rule:MF_01468}.
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DR EMBL; AP012549; BAP17045.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A077JD54; -.
DR STRING; 1228987.ETSB_0154; -.
DR KEGG; ceo:ETSB_0154; -.
DR HOGENOM; CLU_091169_2_1_3; -.
DR Proteomes; UP000031625; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0004525; F:ribonuclease III activity; IEA:InterPro.
DR GO; GO:0019843; F:rRNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0006364; P:rRNA processing; IEA:UniProtKB-UniRule.
DR CDD; cd00593; RIBOc; 1.
DR Gene3D; 1.10.1520.10; Ribonuclease III domain; 1.
DR HAMAP; MF_01468; RNase_Mini_III; 1.
DR InterPro; IPR008226; Mini3_fam.
DR InterPro; IPR000999; RNase_III_dom.
DR InterPro; IPR036389; RNase_III_sf.
DR PANTHER; PTHR34276; MINI-RIBONUCLEASE 3; 1.
DR PANTHER; PTHR34276:SF1; MINI-RIBONUCLEASE 3; 1.
DR Pfam; PF00636; Ribonuclease_3; 1.
DR SMART; SM00535; RIBOc; 1.
DR SUPFAM; SSF69065; RNase III domain-like; 1.
PE 3: Inferred from homology;
KW Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01468};
KW Endonuclease {ECO:0000256|HAMAP-Rule:MF_01468};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_01468};
KW Magnesium {ECO:0000256|HAMAP-Rule:MF_01468};
KW Nuclease {ECO:0000256|HAMAP-Rule:MF_01468};
KW Ribosome biogenesis {ECO:0000256|HAMAP-Rule:MF_01468};
KW RNA-binding {ECO:0000256|HAMAP-Rule:MF_01468};
KW rRNA processing {ECO:0000256|HAMAP-Rule:MF_01468};
KW rRNA-binding {ECO:0000256|HAMAP-Rule:MF_01468}.
FT DOMAIN 27..159
FT /note="RNase III"
FT /evidence="ECO:0000259|SMART:SM00535"
FT ACT_SITE 54
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01468"
SQ SEQUENCE 159 AA; 18074 MW; C34DFCC509C1CB19 CRC64;
MNLPNSDQDQ AQSLIFHEVS RVYDSLSSEC IGVNFKSVGM IQQLSPGFLA YLGDAVYELY
VRSHYIFPPR RLADYHNKVV SLVRAESQAA FLSNLHPHLT EFEKDIVRRG RNTAAGGRRR
ISPELYQQAT SFETLIGYLY LQNPQRLNQL LGKLNLNSA
//
