ID A0A093XGX3_TALMA Unreviewed; 415 AA.
AC A0A093XGX3;
DT 26-NOV-2014, integrated into UniProtKB/TrEMBL.
DT 26-NOV-2014, sequence version 1.
DT 24-JAN-2024, entry version 37.
DE RecName: Full=Queuine tRNA-ribosyltransferase catalytic subunit 1 {ECO:0000256|HAMAP-Rule:MF_03218};
DE EC=2.4.2.64 {ECO:0000256|HAMAP-Rule:MF_03218};
DE AltName: Full=Guanine insertion enzyme {ECO:0000256|HAMAP-Rule:MF_03218};
DE AltName: Full=tRNA-guanine transglycosylase {ECO:0000256|HAMAP-Rule:MF_03218};
GN ORFNames=GQ26_0280560 {ECO:0000313|EMBL:KFX44458.1};
OS Talaromyces marneffei PM1.
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC Eurotiomycetidae; Eurotiales; Trichocomaceae; Talaromyces;
OC Talaromyces sect. Talaromyces.
OX NCBI_TaxID=1077442 {ECO:0000313|EMBL:KFX44458.1, ECO:0000313|Proteomes:UP000029285};
RN [1] {ECO:0000313|Proteomes:UP000029285}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PM1 {ECO:0000313|Proteomes:UP000029285};
RX PubMed=25330172; DOI=10.1371/journal.pgen.1004662;
RA Yang E., Wang G., Cai J., Woo P.C., Lau S.K., Yuen K.-Y., Chow W.-N.,
RA Lin X.;
RT "Signature Gene Expression Reveals Novel Clues to the Molecular Mechanisms
RT of Dimorphic Transition in Penicillium marneffei.";
RL PLoS Genet. 10:e1004662-e1004662(2014).
CC -!- FUNCTION: Catalytic subunit of the queuine tRNA-ribosyltransferase
CC (TGT) that catalyzes the base-exchange of a guanine (G) residue with
CC queuine (Q) at position 34 (anticodon wobble position) in tRNAs with
CC GU(N) anticodons (tRNA-Asp, -Asn, -His and -Tyr), resulting in the
CC hypermodified nucleoside queuosine (7-(((4,5-cis-dihydroxy-2-
CC cyclopenten-1-yl)amino)methyl)-7-deazaguanosine). Catalysis occurs
CC through a double-displacement mechanism. The nucleophile active site
CC attacks the C1' of nucleotide 34 to detach the guanine base from the
CC RNA, forming a covalent enzyme-RNA intermediate. The proton acceptor
CC active site deprotonates the incoming queuine, allowing a nucleophilic
CC attack on the C1' of the ribose to form the product.
CC {ECO:0000256|HAMAP-Rule:MF_03218}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=guanosine(34) in tRNA + queuine = guanine + queuosine(34) in
CC tRNA; Xref=Rhea:RHEA:16633, Rhea:RHEA-COMP:10341, Rhea:RHEA-
CC COMP:18571, ChEBI:CHEBI:16235, ChEBI:CHEBI:17433, ChEBI:CHEBI:74269,
CC ChEBI:CHEBI:194431; EC=2.4.2.64; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_03218};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_03218};
CC -!- SUBUNIT: Heterodimer of a catalytic subunit and an accessory subunit.
CC {ECO:0000256|HAMAP-Rule:MF_03218}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_03218}.
CC -!- SIMILARITY: Belongs to the queuine tRNA-ribosyltransferase family.
CC {ECO:0000256|HAMAP-Rule:MF_03218}.
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:KFX44458.1}.
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DR EMBL; JPOX01000028; KFX44458.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A093XGX3; -.
DR eggNOG; KOG3908; Eukaryota.
DR HOGENOM; CLU_022060_0_1_1; -.
DR Proteomes; UP000029285; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
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:0101030; P:tRNA-guanine transglycosylation; IEA:UniProtKB-UniRule.
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; PTHR43530; QUEUINE TRNA-RIBOSYLTRANSFERASE CATALYTIC SUBUNIT 1; 1.
DR PANTHER; PTHR43530:SF1; QUEUINE TRNA-RIBOSYLTRANSFERASE CATALYTIC SUBUNIT 1; 1.
DR Pfam; PF01702; TGT; 1.
DR SUPFAM; SSF51713; tRNA-guanine transglycosylase; 1.
PE 3: Inferred from homology;
KW Cytoplasm {ECO:0000256|HAMAP-Rule:MF_03218};
KW Glycosyltransferase {ECO:0000256|ARBA:ARBA00022676, ECO:0000256|HAMAP-
KW Rule:MF_03218};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_03218};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_03218};
KW tRNA processing {ECO:0000256|ARBA:ARBA00022694, ECO:0000256|HAMAP-
KW Rule:MF_03218}; Zinc {ECO:0000256|HAMAP-Rule:MF_03218}.
FT DOMAIN 30..391
FT /note="tRNA-guanine(15) transglycosylase-like"
FT /evidence="ECO:0000259|Pfam:PF01702"
FT REGION 264..270
FT /note="RNA binding"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT REGION 288..292
FT /note="RNA binding; important for wobble base 34
FT recognition"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT ACT_SITE 108
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT ACT_SITE 283
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 108..112
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 162
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 206
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 233
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 321
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 323
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 326
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
FT BINDING 358
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03218"
SQ SEQUENCE 415 AA; 45692 MW; 7D6E0706BF25D75D CRC64;
MSTATPSTSP RKSMPSALTF DLHAKCSTTK ARASTLHLPH GSVPLPIFMP VATQASLKGL
TYDQLKDSGC MLCLNNTYHL GLKPGQEVLD LVGGAHKFQG WDRNILTDSG GFQMVSLLKL
ATVTEEGVRF LSPHDGTPML LTPEHSISLQ NSIGSDIMMQ LDDVIVTTSP DRARMQEAME
RSVRWLDRCI DAHKYPERQN LFCIIQGGLD LELRRKCCEE MVARDTPGIA IGGLSGGEAK
DEYCKVVDTC TGLLPDGKPR YVMGVGYPED LVVSVALGAD MFDCVWPTRT ARFGAAITPY
GVINLRNKAY AHDFSPIQDG CKCPCCRPKS EGGLGITKAY VHHLAVKETV GAHLLTMHNV
QYQLSLMGSI REAILKDRYP AFIRKFFEDY YGSRHNAPQW AVDALKRVNV DLLAE
//
