THTPA (thiamine triphosphatase) is a cytosolic hydrolase that catalyzes the highly specific dephosphorylation of thiamine triphosphate (ThTP) to thiamine diphosphate 1. As a member of the triphosphate tunnel metalloenzymes (TTMs) family, THTPA contains magnesium ion binding sites critical for its catalytic activity 1. While ThTP synthesis occurs in nearly all organisms through ATP synthase-like mechanisms, ThTPase activity appears restricted to animals, where THTPA is ubiquitously expressed with probable post-transcriptional regulation 1. By controlling cytosolic ThTP levels, THTPA regulates an energy-related signaling molecule involved in metabolic regulation at the interface between energy and amino acid metabolism 1. Disease relevance includes cancer pathways, where the metastasis suppressor NDRG1 upregulates THTPA expression in multiple cancer models, potentially contributing to anti-proliferative effects through decreased ThTP-dependent energy signaling 2. THTPA has also emerged as a potential biomarker in breast cancer, with differential expression associated with tumor subtypes 3. Additionally, THTPA was identified as a host protein interacting with SARS-CoV-2 ORF10, suggesting potential viral-host interactions 4. Gene expression studies in athletes indicate THTPA responds to nutritional supplementation, highlighting its role in metabolic adaptation 5.