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  Domain Name: TPP_enzyme_PYR
Pyrimidine (PYR) binding domain of thiamine pyrophosphate (TPP)-dependent enzymes. Thiamine pyrophosphate (TPP) family, pyrimidine (PYR) binding domain; found in many key metabolic enzymes which use TPP (also known as thiamine diphosphate) as a cofactor. TPP binds in the cleft formed by a PYR domain and a PP domain. The PYR domain, binds the aminopyrimidine ring of TPP, the PP domain binds the diphosphate residue. A polar interaction between the conserved glutamate of the PYR domain and the N1' of the TPP aminopyrimidine ring is shared by most TPP-dependent enzymes, and participates in the activation of TPP. The PYR and PP domains have a common fold, but do not share strong sequence conservation. The PP domain is not included in this group. Most TPP-dependent enzymes have the PYR and PP domains on the same subunit although these domains can be alternatively arranged in the primary structure. In the case of 2-oxoisovalerate dehydrogenase (2OXO), sulfopyruvate decarboxylase (ComDE), and the E1 component of human pyruvate dehydrogenase complex (E1- PDHc) the PYR and PP domains appear on different subunits. TPP-dependent enzymes are multisubunit proteins, the smallest catalytic unit being a dimer-of-active sites. For many of these enzymes the active sites lie between PP and PYR domains on different subunits. However, for the homodimeric enzymes 1-deoxy-D-xylulose 5-phosphate synthase (DXS) and Desulfovibrio africanus pyruvate:ferredoxin oxidoreductase (PFOR), each active site lies at the interface of the PYR and PP domains from the same subunit.
No pairwise interactions are available for this conserved domain.

Total Mutations Found: 4
Total Disease Mutations Found: 1
This domain occurred 4 times on human genes (6 proteins).



  PYRUVATE DEHYDROGENASE E1-BETA DEFICIENCY


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Range on the Protein:  

   Protein ID            Protein Position

Domain Position:  


Feature Name:Total Found:
TPP binding site
PYR/PP interface
dimer interface













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Please Cite: Peterson, T.A., Adadey, A., Santana-Cruz ,I., Sun, Y., Winder A, Kann, M.G., (2010) DMDM: Domain Mapping of Disease Mutations. Bioinformatics 26 (19), 2458-2459.

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