TKT_HAEIN
ID TKT_HAEIN Reviewed; 665 AA.
AC P43757;
DT 01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1995, sequence version 1.
DT 03-AUG-2022, entry version 133.
DE RecName: Full=Transketolase;
DE Short=TK;
DE EC=2.2.1.1;
GN Name=tktA; OrderedLocusNames=HI_1023;
OS Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC Pasteurellaceae; Haemophilus.
OX NCBI_TaxID=71421;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 51907 / DSM 11121 / KW20 / Rd;
RX PubMed=7542800; DOI=10.1126/science.7542800;
RA Fleischmann R.D., Adams M.D., White O., Clayton R.A., Kirkness E.F.,
RA Kerlavage A.R., Bult C.J., Tomb J.-F., Dougherty B.A., Merrick J.M.,
RA McKenney K., Sutton G.G., FitzHugh W., Fields C.A., Gocayne J.D.,
RA Scott J.D., Shirley R., Liu L.-I., Glodek A., Kelley J.M., Weidman J.F.,
RA Phillips C.A., Spriggs T., Hedblom E., Cotton M.D., Utterback T.R.,
RA Hanna M.C., Nguyen D.T., Saudek D.M., Brandon R.C., Fine L.D.,
RA Fritchman J.L., Fuhrmann J.L., Geoghagen N.S.M., Gnehm C.L., McDonald L.A.,
RA Small K.V., Fraser C.M., Smith H.O., Venter J.C.;
RT "Whole-genome random sequencing and assembly of Haemophilus influenzae
RT Rd.";
RL Science 269:496-512(1995).
CC -!- FUNCTION: Catalyzes the reversible transfer of a two-carbon ketol group
CC from sedoheptulose-7-phosphate to glyceraldehyde-3-phosphate, producing
CC xylulose-5-phosphate and ribose-5-phosphate. Catalyzes the transfer of
CC a two-carbon ketol group from a ketose donor to an aldose acceptor, via
CC a covalent intermediate with the cofactor thiamine pyrophosphate (By
CC similarity). {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 -!- 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};
CC Note=Binds 1 thiamine pyrophosphate per subunit. {ECO:0000250};
CC -!- SUBUNIT: Homodimer. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the transketolase family. {ECO:0000305}.
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DR EMBL; L42023; AAC22683.1; -; Genomic_DNA.
DR PIR; G64108; G64108.
DR RefSeq; NP_439183.1; NC_000907.1.
DR RefSeq; WP_010869107.1; NC_000907.1.
DR AlphaFoldDB; P43757; -.
DR SMR; P43757; -.
DR STRING; 71421.HI_1023; -.
DR EnsemblBacteria; AAC22683; AAC22683; HI_1023.
DR KEGG; hin:HI_1023; -.
DR PATRIC; fig|71421.8.peg.1067; -.
DR eggNOG; COG0021; Bacteria.
DR HOGENOM; CLU_009227_0_0_6; -.
DR OMA; HHTEGIE; -.
DR PhylomeDB; P43757; -.
DR BioCyc; HINF71421:G1GJ1-1063-MON; -.
DR Proteomes; UP000000579; Chromosome.
DR GO; GO:0005829; C:cytosol; IBA:GO_Central.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0004802; F:transketolase activity; IBA:GO_Central.
DR GO; GO:0006098; P:pentose-phosphate shunt; IBA:GO_Central.
DR CDD; cd02012; TPP_TK; 1.
DR Gene3D; 3.40.50.920; -; 1.
DR InterPro; IPR029061; THDP-binding.
DR InterPro; IPR009014; Transketo_C/PFOR_II.
DR InterPro; IPR005475; Transketolase-like_Pyr-bd.
DR InterPro; IPR005478; Transketolase_bac-like.
DR InterPro; IPR020826; Transketolase_BS.
DR InterPro; IPR033248; Transketolase_C.
DR InterPro; IPR033247; Transketolase_fam.
DR InterPro; IPR005474; Transketolase_N.
DR PANTHER; PTHR43522; PTHR43522; 1.
DR Pfam; PF02779; Transket_pyr; 1.
DR Pfam; PF02780; Transketolase_C; 1.
DR Pfam; PF00456; Transketolase_N; 1.
DR SMART; SM00861; Transket_pyr; 1.
DR SUPFAM; SSF52518; SSF52518; 2.
DR SUPFAM; SSF52922; SSF52922; 1.
DR TIGRFAMs; TIGR00232; tktlase_bact; 1.
DR PROSITE; PS00801; TRANSKETOLASE_1; 1.
DR PROSITE; PS00802; TRANSKETOLASE_2; 1.
PE 3: Inferred from homology;
KW Calcium; Magnesium; Metal-binding; Reference proteome;
KW Thiamine pyrophosphate; Transferase.
FT CHAIN 1..665
FT /note="Transketolase"
FT /id="PRO_0000191858"
FT ACT_SITE 413
FT /note="Proton donor"
FT /evidence="ECO:0000250"
FT BINDING 26
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 66
FT /ligand="thiamine diphosphate"
FT /ligand_id="ChEBI:CHEBI:58937"
FT /evidence="ECO:0000250"
FT BINDING 114..116
FT /ligand="thiamine diphosphate"
FT /ligand_id="ChEBI:CHEBI:58937"
FT /evidence="ECO:0000250"
FT BINDING 155
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 156
FT /ligand="thiamine diphosphate"
FT /ligand_id="ChEBI:CHEBI:58937"
FT /evidence="ECO:0000250"
FT BINDING 185
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 185
FT /ligand="thiamine diphosphate"
FT /ligand_id="ChEBI:CHEBI:58937"
FT /evidence="ECO:0000250"
FT BINDING 187
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 261
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 261
FT /ligand="thiamine diphosphate"
FT /ligand_id="ChEBI:CHEBI:58937"
FT /evidence="ECO:0000250"
FT BINDING 358
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 385
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 439
FT /ligand="thiamine diphosphate"
FT /ligand_id="ChEBI:CHEBI:58937"
FT /evidence="ECO:0000250"
FT BINDING 463
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 471
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 522
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT SITE 26
FT /note="Important for catalytic activity"
FT /evidence="ECO:0000250"
FT SITE 261
FT /note="Important for catalytic activity"
FT /evidence="ECO:0000250"
SQ SEQUENCE 665 AA; 72718 MW; 71FB421179D7FCFB CRC64;
MATRRQLANA IRVLAMDSVQ KAKSGHPGAP MGMADIAEVL WRDFLKHNPT NPKWADRDRF
VLSNGHGSML IYSLLHLTGY DLSIEDLKQF RQLHSKTPGH PEYGYAPGVE TTTGPLGQGI
TNAVGMAIAE KTLAGQFNRE GHEIVDHHTY VFLGDGCLME GISHEACSLA GTLGLGKLIA
FYDDNNISID GHVDGWFSDD TAERFEAYGW QVIRNVDGHD AEQIRAATIL AQAEKGKPTL
IICKTIIGFG SPNKSGSHDS HGAPLGDEEI DLTRKALGWE YAPFEIPAEY YAEWSAKEKG
AAAEKSWEEK FAAYAKAYPE LAAEFKRRVS GELPTNWAAE SKAFIEKLQA NPASIASRKA
SQNAIEAYAH VLPEFLGGSA DLASSNLTLW SGSKPIRAHE NVGGNYINYG VREFGMSAIM
NGIALHGGFI PYGATFLMFY EYAHNAVRMA ALMKQRTLFV YTHDSIGLGE DGPTHQPVEQ
TASLRLIPNL ETWRPCDQVE SAIAWQQAVE RQDGPSALIF TRQNLAQMDR TSAQLDAVKR
GAYVLKDCDG TPELIFIATG SEVELAVQAA EALSAEGKKV RVVSMPSTNR FDKQDAAYRE
SVLPAAVTKR VAIEAGIADF WYKYVGFNGR VIGMNSFGES APADQLFKLF GFTVENVVAK
AKEIL
