RNT_BLOFL
ID RNT_BLOFL Reviewed; 223 AA.
AC Q7VR55;
DT 11-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2003, sequence version 1.
DT 03-AUG-2022, entry version 87.
DE RecName: Full=Ribonuclease T {ECO:0000255|HAMAP-Rule:MF_00157};
DE EC=3.1.13.- {ECO:0000255|HAMAP-Rule:MF_00157};
DE AltName: Full=Exoribonuclease T {ECO:0000255|HAMAP-Rule:MF_00157};
DE Short=RNase T {ECO:0000255|HAMAP-Rule:MF_00157};
GN Name=rnt {ECO:0000255|HAMAP-Rule:MF_00157}; OrderedLocusNames=Bfl368;
OS Blochmannia floridanus.
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; ant endosymbionts; Candidatus Blochmannia.
OX NCBI_TaxID=203907;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=12886019; DOI=10.1073/pnas.1533499100;
RA Gil R., Silva F.J., Zientz E., Delmotte F., Gonzalez-Candelas F.,
RA Latorre A., Rausell C., Kamerbeek J., Gadau J., Hoelldobler B.,
RA van Ham R.C.H.J., Gross R., Moya A.;
RT "The genome sequence of Blochmannia floridanus: comparative analysis of
RT reduced genomes.";
RL Proc. Natl. Acad. Sci. U.S.A. 100:9388-9393(2003).
CC -!- FUNCTION: Trims short 3' overhangs of a variety of RNA species, leaving
CC a one or two nucleotide 3' overhang. Responsible for the end-turnover
CC of tRNA: specifically removes the terminal AMP residue from uncharged
CC tRNA (tRNA-C-C-A). Also appears to be involved in tRNA biosynthesis.
CC {ECO:0000255|HAMAP-Rule:MF_00157}.
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00157};
CC Note=Binds two Mg(2+) per subunit. The active form of the enzyme binds
CC two Mg(2+) ions in its active site. The first Mg(2+) forms only one
CC salt bridge with the protein. {ECO:0000255|HAMAP-Rule:MF_00157};
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00157}.
CC -!- SIMILARITY: Belongs to the RNase T family. {ECO:0000255|HAMAP-
CC Rule:MF_00157}.
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DR EMBL; BX248583; CAD83434.1; -; Genomic_DNA.
DR RefSeq; WP_011126642.1; NC_005061.1.
DR AlphaFoldDB; Q7VR55; -.
DR SMR; Q7VR55; -.
DR STRING; 203907.Bfl368; -.
DR EnsemblBacteria; CAD83434; CAD83434; Bfl368.
DR KEGG; bfl:Bfl368; -.
DR eggNOG; COG0847; Bacteria.
DR HOGENOM; CLU_082724_0_0_6; -.
DR OMA; CYMVNHL; -.
DR OrthoDB; 1985371at2; -.
DR Proteomes; UP000002192; Chromosome.
DR GO; GO:0016896; F:exoribonuclease activity, producing 5'-phosphomonoesters; IEA:UniProtKB-UniRule.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003676; F:nucleic acid binding; IEA:InterPro.
DR GO; GO:0008033; P:tRNA processing; IEA:UniProtKB-KW.
DR Gene3D; 3.30.420.10; -; 1.
DR HAMAP; MF_00157; RNase_T; 1.
DR InterPro; IPR013520; Exonuclease_RNaseT/DNA_pol3.
DR InterPro; IPR005987; RNase_T.
DR InterPro; IPR012337; RNaseH-like_sf.
DR InterPro; IPR036397; RNaseH_sf.
DR PANTHER; PTHR30231:SF2; PTHR30231:SF2; 1.
DR Pfam; PF00929; RNase_T; 1.
DR SMART; SM00479; EXOIII; 1.
DR SUPFAM; SSF53098; SSF53098; 1.
DR TIGRFAMs; TIGR01298; RNaseT; 1.
PE 3: Inferred from homology;
KW Exonuclease; Hydrolase; Magnesium; Metal-binding; Nuclease;
KW Reference proteome; tRNA processing.
FT CHAIN 1..223
FT /note="Ribonuclease T"
FT /id="PRO_0000208959"
FT DOMAIN 20..195
FT /note="Exonuclease"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT ACT_SITE 182
FT /note="Proton donor/acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT BINDING 23
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT BINDING 23
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT BINDING 25
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT BINDING 182
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT BINDING 187
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT SITE 124
FT /note="Important for substrate binding and specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT SITE 147
FT /note="Important for substrate binding and specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
SQ SEQUENCE 223 AA; 24782 MW; 7DBECA4879883A55 CRC64;
MIDPVNIDTL KARFRGFYPV VIDVETSGLN ASTNALLEIA TITLKMNEDG WLHVDNMLHF
HIKSFPGAIL QPEALALNKI NPNSPLRFAV TEQEALVEIF KMVHVGIKAQ QCNKAIIVAH
NASFDHSFLM AATERTNNIQ DNPFHPFVTF DTAALSGLVF GQTVLSKACE YAGIIFDKNK
AHSALYDAEK TAILFCTLVN AWKKLGGWPW KPSLITNNEG YHK
