ID   A0A1S1NRV9_9GAMM        Unreviewed;       372 AA.
AC   A0A1S1NRV9;
DT   12-APR-2017, integrated into UniProtKB/TrEMBL.
DT   12-APR-2017, sequence version 1.
DT   12-OCT-2022, entry version 20.
DE   RecName: Full=Queuine tRNA-ribosyltransferase {ECO:0000256|HAMAP-Rule:MF_00168};
DE            EC=2.4.2.29 {ECO:0000256|HAMAP-Rule:MF_00168};
DE   AltName: Full=Guanine insertion enzyme {ECO:0000256|HAMAP-Rule:MF_00168};
DE   AltName: Full=tRNA-guanine transglycosylase {ECO:0000256|HAMAP-Rule:MF_00168};
GN   Name=tgt {ECO:0000256|HAMAP-Rule:MF_00168};
GN   ORFNames=BH688_16590 {ECO:0000313|EMBL:OHV07794.1};
OS   Kushneria phosphatilytica.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Oceanospirillales;
OC   Halomonadaceae; Kushneria.
OX   NCBI_TaxID=657387 {ECO:0000313|EMBL:OHV07794.1, ECO:0000313|Proteomes:UP000179907};
RN   [1] {ECO:0000313|EMBL:OHV07794.1, ECO:0000313|Proteomes:UP000179907}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=YCWA18 {ECO:0000313|EMBL:OHV07794.1,
RC   ECO:0000313|Proteomes:UP000179907};
RA   Wang C., Qu L.;
RT   "The draft genome suquence of Kushneria sp. YCWA18.";
RL   Submitted (OCT-2016) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the base-exchange of a guanine (G) residue with the
CC       queuine precursor 7-aminomethyl-7-deazaguanine (PreQ1) at position 34
CC       (anticodon wobble position) in tRNAs with GU(N) anticodons (tRNA-Asp,
CC       -Asn, -His and -Tyr). Catalysis occurs through a double-displacement
CC       mechanism. The nucleophile active site attacks the C1' of nucleotide 34
CC       to detach the guanine base from the RNA, forming a covalent enzyme-RNA
CC       intermediate. The proton acceptor active site deprotonates the incoming
CC       PreQ1, allowing a nucleophilic attack on the C1' of the ribose to form
CC       the product. After dissociation, two additional enzymatic reactions on
CC       the tRNA convert PreQ1 to queuine (Q), resulting in the hypermodified
CC       nucleoside queuosine (7-(((4,5-cis-dihydroxy-2-cyclopenten-1-
CC       yl)amino)methyl)-7-deazaguanosine). {ECO:0000256|HAMAP-Rule:MF_00168}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=7-aminomethyl-7-carbaguanine + guanosine(34) in tRNA = 7-
CC         aminomethyl-7-carbaguanosine(34) in tRNA + guanine;
CC         Xref=Rhea:RHEA:24104, Rhea:RHEA-COMP:10341, Rhea:RHEA-COMP:10342,
CC         ChEBI:CHEBI:16235, ChEBI:CHEBI:58703, ChEBI:CHEBI:74269,
CC         ChEBI:CHEBI:82833; EC=2.4.2.29; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_00168};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000256|HAMAP-Rule:MF_00168};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000256|HAMAP-Rule:MF_00168};
CC   -!- PATHWAY: tRNA modification; tRNA-queuosine biosynthesis.
CC       {ECO:0000256|HAMAP-Rule:MF_00168}.
CC   -!- SUBUNIT: Homodimer. Within each dimer, one monomer is responsible for
CC       RNA recognition and catalysis, while the other monomer binds to the
CC       replacement base PreQ1. {ECO:0000256|HAMAP-Rule:MF_00168}.
CC   -!- SIMILARITY: Belongs to the queuine tRNA-ribosyltransferase family.
CC       {ECO:0000256|HAMAP-Rule:MF_00168}.
CC   -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC       whole genome shotgun (WGS) entry which is preliminary data.
CC       {ECO:0000313|EMBL:OHV07794.1}.
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; MKZT01000024; OHV07794.1; -; Genomic_DNA.
DR   STRING; 657387.BH688_16590; -.
DR   EnsemblBacteria; OHV07794; OHV07794; BH688_16590.
DR   UniPathway; UPA00392; -.
DR   Proteomes; UP000179907; Unassembled WGS sequence.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0008479; F:queuine tRNA-ribosyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008616; P:queuosine biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0101030; P:tRNA-guanine transglycosylation; IEA:InterPro.
DR   Gene3D; 3.20.20.105; -; 1.
DR   HAMAP; MF_00168; Q_tRNA_Tgt; 1.
DR   InterPro; IPR004803; TGT.
DR   InterPro; IPR036511; TGT-like_sf.
DR   InterPro; IPR002616; tRNA_ribo_trans-like.
DR   Pfam; PF01702; TGT; 1.
DR   SUPFAM; SSF51713; SSF51713; 1.
DR   TIGRFAMs; TIGR00430; Q_tRNA_tgt; 1.
DR   TIGRFAMs; TIGR00449; tgt_general; 1.
PE   3: Inferred from homology;
KW   Glycosyltransferase {ECO:0000256|ARBA:ARBA00022676, ECO:0000256|HAMAP-
KW   Rule:MF_00168}; Metal-binding {ECO:0000256|HAMAP-Rule:MF_00168};
KW   Queuosine biosynthesis {ECO:0000256|HAMAP-Rule:MF_00168};
KW   Reference proteome {ECO:0000313|Proteomes:UP000179907};
KW   Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW   Rule:MF_00168};
KW   tRNA processing {ECO:0000256|ARBA:ARBA00022694, ECO:0000256|HAMAP-
KW   Rule:MF_00168}; Zinc {ECO:0000256|HAMAP-Rule:MF_00168}.
FT   DOMAIN          11..363
FT                   /note="TGT"
FT                   /evidence="ECO:0000259|Pfam:PF01702"
FT   REGION          243..249
FT                   /note="RNA binding"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   REGION          267..271
FT                   /note="RNA binding; important for wobble base 34
FT                   recognition"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   ACT_SITE        89
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   ACT_SITE        262
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         89..93
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         143
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         185
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         212
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         300
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         302
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         305
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT   BINDING         331
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
SQ   SEQUENCE   372 AA;  41441 MW;  798A6E9875EDF858 CRC64;
     MNFERLATDG RARRGRLSFP RGTVETPAFM PVGTYGTVKG MTPGAVEEIG AEIILGNTFH
     LWLRPGTEIV AAHGDLHDFA QWHRPILTDS GGFQVFSLGE MRKITEEGVH FRSPVDGAKV
     FMGPEESMAV QRALGSDVVM IFDECTPYPA TFEEAERSME LSLRWAARSR EAHGDSPAAL
     FGIIQGGMYR ELRERSLKDL LDIGFDGLAI GGLSVGEPKD EMMGVLDYLP ELMPDHSPRY
     LMGVGKPEDL VEGVRRGVDM FDCVMPTRNA RNGHLFTDDG VIRLRNARHR TDTRPLEEAC
     DCYTCRNFSR AYLHHLDRCG EMLGAQLNTI HNLRHYQRLM AGLRGAIEAG TLADFVARFY
     ARRGLEVPPL TG
//