ID   ATGT_METKA              Reviewed;         459 AA.
AC   Q8TYV3;
DT   25-JUL-2006, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2002, sequence version 1.
DT   03-AUG-2022, entry version 96.
DE   RecName: Full=tRNA-guanine(15) transglycosylase {ECO:0000255|HAMAP-Rule:MF_01634};
DE            EC=2.4.2.48 {ECO:0000255|HAMAP-Rule:MF_01634};
DE   AltName: Full=7-cyano-7-deazaguanine tRNA-ribosyltransferase {ECO:0000255|HAMAP-Rule:MF_01634};
DE   AltName: Full=Archaeal tRNA-guanine transglycosylase {ECO:0000255|HAMAP-Rule:MF_01634};
GN   Name=tgtA {ECO:0000255|HAMAP-Rule:MF_01634}; OrderedLocusNames=MK0188;
OS   Methanopyrus kandleri (strain AV19 / DSM 6324 / JCM 9639 / NBRC 100938).
OC   Archaea; Euryarchaeota; Methanopyri; Methanopyrales; Methanopyraceae;
OC   Methanopyrus.
OX   NCBI_TaxID=190192;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AV19 / DSM 6324 / JCM 9639 / NBRC 100938;
RX   PubMed=11930014; DOI=10.1073/pnas.032671499;
RA   Slesarev A.I., Mezhevaya K.V., Makarova K.S., Polushin N.N.,
RA   Shcherbinina O.V., Shakhova V.V., Belova G.I., Aravind L., Natale D.A.,
RA   Rogozin I.B., Tatusov R.L., Wolf Y.I., Stetter K.O., Malykh A.G.,
RA   Koonin E.V., Kozyavkin S.A.;
RT   "The complete genome of hyperthermophile Methanopyrus kandleri AV19 and
RT   monophyly of archaeal methanogens.";
RL   Proc. Natl. Acad. Sci. U.S.A. 99:4644-4649(2002).
CC   -!- FUNCTION: Exchanges the guanine residue with 7-cyano-7-deazaguanine
CC       (preQ0) at position 15 in the dihydrouridine loop (D-loop) of archaeal
CC       tRNAs. {ECO:0000255|HAMAP-Rule:MF_01634}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=7-cyano-7-deazaguanine + guanosine(15) in tRNA = 7-cyano-7-
CC         carbaguanosine(15) in tRNA + guanine; Xref=Rhea:RHEA:43164,
CC         Rhea:RHEA-COMP:10371, Rhea:RHEA-COMP:10372, ChEBI:CHEBI:16235,
CC         ChEBI:CHEBI:45075, ChEBI:CHEBI:74269, ChEBI:CHEBI:82850; EC=2.4.2.48;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01634};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01634};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01634};
CC   -!- PATHWAY: tRNA modification; archaeosine-tRNA biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_01634}.
CC   -!- SIMILARITY: Belongs to the archaeosine tRNA-ribosyltransferase family.
CC       {ECO:0000255|HAMAP-Rule:MF_01634}.
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DR   EMBL; AE009439; AAM01405.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q8TYV3; -.
DR   SMR; Q8TYV3; -.
DR   STRING; 190192.MK0188; -.
DR   EnsemblBacteria; AAM01405; AAM01405; MK0188.
DR   KEGG; mka:MK0188; -.
DR   PATRIC; fig|190192.8.peg.188; -.
DR   HOGENOM; CLU_030083_0_0_2; -.
DR   OMA; FPCSCPV; -.
DR   UniPathway; UPA00393; -.
DR   Proteomes; UP000001826; Chromosome.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0016763; F:pentosyltransferase activity; IEA:InterPro.
DR   GO; GO:0006400; P:tRNA modification; IEA:InterPro.
DR   Gene3D; 3.20.20.105; -; 1.
DR   HAMAP; MF_01634; TgtA_arch; 1.
DR   InterPro; IPR036511; TGT-like_sf.
DR   InterPro; IPR004804; TgtA.
DR   InterPro; IPR002616; tRNA_ribo_trans-like.
DR   Pfam; PF01702; TGT; 1.
DR   SUPFAM; SSF51713; SSF51713; 1.
DR   TIGRFAMs; TIGR00432; arcsn_tRNA_tgt; 1.
DR   TIGRFAMs; TIGR00449; tgt_general; 1.
PE   3: Inferred from homology;
KW   Glycosyltransferase; Metal-binding; Reference proteome; Transferase;
KW   tRNA processing; Zinc.
FT   CHAIN           1..459
FT                   /note="tRNA-guanine(15) transglycosylase"
FT                   /id="PRO_0000247872"
FT   ACT_SITE        90
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01634"
FT   BINDING         125
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01634"
FT   BINDING         192
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01634"
FT   BINDING         275
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01634"
FT   BINDING         277
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01634"
FT   BINDING         280
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01634"
SQ   SEQUENCE   459 AA;  51749 MW;  EF5B6DEFA448B5AF CRC64;
     MNVAFEVKDR DVAGRLGRLE VNGRRLKTPA LLPVVNPNKP TLDPREISKL GFDGVITNAY
     IIRKHEHLRE QALEEGVHGL LGFDGFVMTD SGSFQLAEYG DVEVSNEEIV RFQAKIGSDV
     GTILDVPTPP DAPRSRVERD LETTLKRARE AVELDEHPPL ALTVQGSTYE DLRRLCAEKL
     AELPAAVYPV GGVVPLLEEY RFVDVVRVVL AAKSSLPPHR PVHLFGCGHP LAIPLAVAMG
     CDLFDSASYA IYARSDRYMS ILGTLKLEEL ETFPCSCPAC TRHDPDDVRE MEPRERTRVL
     ATHNLYELRR VIETTRQAIV SGELWELAES VCRAHPRAWA GMVELARRGG ELERWCPAVK
     RSVFVCDEVS KGRPELRLYR RRLRDRFGEL SGRKVVKGIS RPYAEIVEWL EPWELAFADE
     WLGVVPGELS WSYPCHCLVE PSGDDEGEDR RRGEEGRRR