>gnl|CDD|129094 smart00861, Transket_pyr, Transketolase, pyrimidine binding domain. Transketolase (TK) catalyzes the reversible transfer of a two-carbon ketol unit from xylulose 5-phosphate to an aldose receptor, such as ribose 5-phosphate, to form sedoheptulose 7-phosphate and glyceraldehyde 3- phosphate. This enzyme, together with transaldolase, provides a link between the glycolytic and pentose-phosphate pathways. TK requires thiamine pyrophosphate as a cofactor. In most sources where TK has been purified, it is a homodimer of approximately 70 Kd subunits. TK sequences from a variety of eukaryotic and prokaryotic sources show that the enzyme has been evolutionarily conserved. In the peroxisomes of methylotrophic yeast Hansenula polymorpha, there is a highly related enzyme, dihydroxy-acetone synthase (DHAS) (also known as formaldehyde transketolase), which exhibits a very unusual specificity by including formaldehyde amongst its substrates. Length = 168

 Score =  142 bits (360), Expect = 2e-34
 Identities = 65/180 (36%), Positives = 87/180 (48%), Gaps = 23/180 (12%)

Query: 141 TVREALRDAIAEEMRRD-KDVFIMGEEVA-----EYQGAYKVTQGLLQEFGCERVIDTPI 194
             R+A  +A+AE   RD + V + G +V      +  G +  T+GL    G  RVIDT I
Sbjct: 1   ATRKAFGEALAELAERDPERVVVSGADVGGSTGLDRGGVFPDTKGL----GPGRVIDTGI 56

Query: 195 TEHGFAGIGIGASFAGLKPIVEFMTFNFAMQAIDQIINSAAKTRYMSGGQITTSIVFRGP 254
            E    G   G + AGL+P+V    F F  +A DQI +  A  R          +V R  
Sbjct: 57  AEQAMVGFAAGLALAGLRPVVAIF-FTFFDRAKDQIRSDGAMGR--------VPVVVRHD 107

Query: 255 NGAAARV--AAQHSQCYAAWYSHVPGLKVVIPYTASDAKGLLKAAIRDPN--PVIFLENE 310
           +G          HSQ   A    +PGLKVV P   ++AKGLL+AAIR  +  PVI LE +
Sbjct: 108 SGGGVGEDGPTHHSQEDEALLRAIPGLKVVAPSDPAEAKGLLRAAIRRDDGPPVIRLERK 167