ID   TKT_POPEU               Reviewed;          15 AA.
AC   P84540;
DT   21-JUN-2005, integrated into UniProtKB/Swiss-Prot.
DT   21-JUN-2005, sequence version 1.
DT   11-DEC-2019, entry version 30.
DE   RecName: Full=Transketolase;
DE            Short=TK;
DE            EC=2.2.1.1;
DE   Flags: Fragment;
OS   Populus euphratica (Euphrates poplar).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Malpighiales; Salicaceae; Saliceae; Populus.
OX   NCBI_TaxID=75702;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Leaf;
RX   PubMed=16740589; DOI=10.1093/aob/mcl106;
RA   Ferreira S., Hjernoe K., Larsen M., Wingsle G., Larsen P., Fey S.,
RA   Roepstorff P., Pais M.S.;
RT   "Proteome profiling of Populus euphratica Oliv. upon heat stress.";
RL   Ann. Bot. 98:361-377(2006).
CC   -!- FUNCTION: Catalyzes the transfer of a two-carbon ketol group from a
CC       ketose donor to an aldose acceptor, via a covalent intermediate with
CC       the cofactor thiamine pyrophosphate. {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=D-glyceraldehyde 3-phosphate + D-sedoheptulose 7-phosphate =
CC         aldehydo-D-ribose 5-phosphate + D-xylulose 5-phosphate;
CC         Xref=Rhea:RHEA:10508, ChEBI:CHEBI:57483, ChEBI:CHEBI:57737,
CC         ChEBI:CHEBI:58273, ChEBI:CHEBI:59776; EC=2.2.1.1;
CC         Evidence={ECO:0000250|UniProtKB:P23254};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC       Name=Ca(2+); Xref=ChEBI:CHEBI:29108; Evidence={ECO:0000250};
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence={ECO:0000250};
CC       Name=Co(2+); Xref=ChEBI:CHEBI:48828; Evidence={ECO:0000250};
CC       Note=Binds 1 Mg(2+) ion per subunit. Can also utilize other divalent
CC       metal cations, such as Ca(2+), Mn(2+) and Co(2+). {ECO:0000250};
CC   -!- COFACTOR:
CC       Name=thiamine diphosphate; Xref=ChEBI:CHEBI:58937;
CC         Evidence={ECO:0000250|UniProtKB:P23254};
CC       Note=Binds 1 thiamine pyrophosphate per subunit.
CC       {ECO:0000250|UniProtKB:P23254};
CC   -!- SUBUNIT: Homodimer. {ECO:0000250|UniProtKB:P23254}.
CC   -!- SIMILARITY: Belongs to the transketolase family. {ECO:0000255}.
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   GO; GO:0004802; F:transketolase activity; IEA:UniProtKB-EC.
PE   1: Evidence at protein level;
KW   Calcium; Direct protein sequencing; Thiamine pyrophosphate; Transferase.
FT   CHAIN           <1..>15
FT                   /note="Transketolase"
FT                   /id="PRO_0000191909"
FT   NON_TER         1
FT   NON_TER         15
SQ   SEQUENCE   15 AA;  1590 MW;  7041E7E7EC8959BE CRC64;
     ALPTYTPESP ADATR