This gene encodes a protein, that exists as a homodimer, which catalyzes the conversion of thiamine to thiamine pyrophosphate. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008] (from
Akcay et al., Erzurum, Turkey. In J Cardiovasc Pharmacol Ther, Mar 2015
BACKGROUND AND PURPOSE: To investigate the effect of thiamine and thiamine pyrophosphate on doxorubicin-induced cardiotoxicity biochemically and histopathologically and to examine whether doxorubicin cardiotoxicity is related to the conversion of thiamine into thiamine pyrophosphate and inhibition of thiamine pyrophosphokinase (TPK) enzyme.
Chang et al., Seoul, South Korea. In Cancer Lett, Mar 2015
The results showed the expression of two thiamine transporter genes (SLC19A2, SLC25A19) as well as thiamine pyrophosphokinase-1 (TPK1) were decreased in both RNA and protein level in miR-155 dependent manner.
Nosaka et al., In J Nutr Sci Vitaminol (tokyo), 2014
Many eubacterial cells directly synthesize thiamin pyrophosphate by the phosphorylation of thiamin phosphate by thiamin phosphate kinase (ThiL), whereas this final step occurs in two stages in eukaryotic cells and some eubacterial cells: hydrolysis of thiamin phosphate to free thiamin and its pyrophosphorylation by thiamin pyrophosphokinase.
Saliba et al., Canberra, Australia. In Nat Commun, 2012
Overexpression of thiamine pyrophosphokinase (the enzyme that converts thiamine into its active form, thiamine pyrophosphate) hypersensitizes parasites to oxythiamine by up to 1,700-fold, consistent with oxythiamine being a substrate for thiamine pyrophosphokinase and its conversion into an antimetabolite.
Among the proteins involved in thiamin metabolism, thiamin transporters, thiamin pyrophosphokinase and a soluble 25-kDa thiamin triphosphatase have been characterized at the molecular level, in contrast to thiamin mono- and diphosphatases whose specificities remain to be proven.
Hedrich et al., Würzburg, Germany. In Plant J, 2007
findings show that AtTPK1 (KCO1), interacts with 14-3-3 proteins (general regulating factors, GRFs; TPK1 seems to provide for a Ca(2+)- and 14-3-3-sensitive mechanism capable of controlling cytoplasmic potassium homeostasis in plants