ID A0A238KJ65_9RHOB Unreviewed; 376 AA.
AC A0A238KJ65;
DT 25-OCT-2017, integrated into UniProtKB/TrEMBL.
DT 25-OCT-2017, sequence version 1.
DT 24-JAN-2024, entry version 26.
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 ECO:0000313|EMBL:SMX42823.1};
GN ORFNames=COL8621_02089 {ECO:0000313|EMBL:SMX42823.1};
OS Actibacterium lipolyticum.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Roseobacteraceae; Actibacterium.
OX NCBI_TaxID=1524263 {ECO:0000313|EMBL:SMX42823.1, ECO:0000313|Proteomes:UP000202922};
RN [1] {ECO:0000313|Proteomes:UP000202922}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CECT 8621 {ECO:0000313|Proteomes:UP000202922};
RA Rodrigo-Torres L., Arahal R. D., Lucena T.;
RL Submitted (MAY-2017) 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: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00168}.
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DR EMBL; FXYE01000002; SMX42823.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A238KJ65; -.
DR OrthoDB; 9805417at2; -.
DR UniPathway; UPA00392; -.
DR Proteomes; UP000202922; Unassembled WGS sequence.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0008479; F:tRNA-guanosine(34) queuine transglycosylase 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; Queuine tRNA-ribosyltransferase-like; 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 NCBIfam; TIGR00430; Q_tRNA_tgt; 1.
DR NCBIfam; TIGR00449; tgt_general; 1.
DR PANTHER; PTHR46499; QUEUINE TRNA-RIBOSYLTRANSFERASE; 1.
DR PANTHER; PTHR46499:SF1; QUEUINE TRNA-RIBOSYLTRANSFERASE; 1.
DR Pfam; PF01702; TGT; 1.
DR SUPFAM; SSF51713; tRNA-guanine transglycosylase; 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:UP000202922};
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 15..367
FT /note="tRNA-guanine(15) transglycosylase-like"
FT /evidence="ECO:0000259|Pfam:PF01702"
FT REGION 248..254
FT /note="RNA binding"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT ACT_SITE 93
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT ACT_SITE 267
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT BINDING 93..97
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT BINDING 147
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT BINDING 190
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT BINDING 217
FT /ligand="substrate"
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 307
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT BINDING 310
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
FT BINDING 336
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00168"
SQ SEQUENCE 376 AA; 41951 MW; 28DCC2B431CDD0A1 CRC64;
MAPRFNFDLQ ATDGKARTGV ISTPRGEIRT PAFMPVGTAA TVKAMMPESV AATGADILLG
NTYHLMLRPT AERIDRLGGL HKFMNWDKPI LTDSGGFQVM SLSDLRKMNE KGVTFRSHID
GSRHTLTPER SMEIQKLLGS DIVMCFDECT PFPAEEKVAL ESMRMSMRWA DRSKEAFGDR
PGYALFGIQQ GSVYRDQREE SAEKLRAIGF DGYAVGGLAV GEGQENMFSV LDYAPDMLPT
DKPRYLMGVG KPDDIVGAVK RGIDMMDCVL PSRSGRTGQV FTRRGVVNIK NARHQDDPRP
LDEHCTCPAC SNYSRAYLHH VFRAQEIISS MLLTWHNLHY YQELMAGLRS AIAENRFDAF
EKAFHAGRAD GDIEQL
//
