RNT_MANHA
ID RNT_MANHA Reviewed; 216 AA.
AC O54364;
DT 30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT 01-JUN-1998, sequence version 1.
DT 03-AUG-2022, entry version 75.
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};
OS Mannheimia haemolytica (Pasteurella haemolytica).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC Pasteurellaceae; Mannheimia.
OX NCBI_TaxID=75985;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=h196;
RA Schryvers A.B., Ogunnariwo J.A., Gonzalez G.C., Woo T.K.W., Lo R.Y.C.;
RT "Characterization of the Pasteurella haemolytica transferrin receptor
RT protein genes and the recombinant receptor proteins.";
RL Submitted (OCT-1996) to the EMBL/GenBank/DDBJ databases.
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; U73302; AAB93471.1; -; Genomic_DNA.
DR AlphaFoldDB; O54364; -.
DR SMR; O54364; -.
DR STRING; 75985.WC39_03600; -.
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 tRNA processing.
FT CHAIN 1..216
FT /note="Ribonuclease T"
FT /id="PRO_0000208965"
FT DOMAIN 23..198
FT /note="Exonuclease"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT ACT_SITE 185
FT /note="Proton donor/acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT BINDING 26
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 26
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 28
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 185
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 190
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 80
FT /note="Important for substrate binding and specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
FT SITE 150
FT /note="Important for substrate binding and specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00157"
SQ SEQUENCE 216 AA; 23950 MW; 40DA032CA71B441F CRC64;
MEQTTEQIDY KLLKHRFRGY LPVVIDVETA GLNAQTDALL ELAAITLKMD EQGYLVPDQQ
CHFHIAPFEG ANINPESLKF NGIDIDNPLR GAVAENIAIP GMFIMVRKAM KEQGCQRGVI
VAHNAASDPG FFYRAAIKRI NAKRDPFHPF AMFDTATLAG FMYGQTVLVK ACQVAKIPFD
GKQAHSALYD TERTAELFCA MVNRLKDLGG FPPLSD
