Inorganic pyrophosphatase (or inorganic diphosphatase, PPase) is an enzyme (EC 3.6.1.1) that catalyzes the conversion of one ion of pyrophosphate to two phosphate ions. This is a highly exergonic reaction, and therefore can be coupled to unfavorable biochemical transformations in order to drive these transformations to completion. The functionality of this enzyme plays a critical role in lipid metabolism (including lipid synthesis and degradation), calcium absorption and bone formation, and DNA synthesis, as well as other biochemical transformations. Two types of inorganic diphosphatase, very different in terms of both amino acid sequence and structure, have been characterised to date: soluble and transmembrane proton-pumping pyrophosphatases (sPPases and H(+)-PPases, respectively). sPPases are ubiquitous proteins that hydrolyse pyrophosphate to release heat, whereas H+-PPases, so far unidentified in animal and fungal cells, couple the energy of PPi hydrolysis to proton movement across biological membranes.
Background References
1. Wang S et al. PPA1, an energy metabolism initiator, plays an important role in the progression of malignant tumors. Front Oncol. 2022 Nov
2. Sun Y et al. Cold-inducible PPA1 is critical for the adipocyte browning in mice. Biochem Biophys Res Commun. 2023 Oct
Western blot analysis of Pyrophosphatase 1 on different lysates with Rabbit anti-Pyrophosphatase 1 antibody (HA722437) at 1/1,000 dilution.
Lane 1: HeLa cell lysate Lane 2: HepG2 cell lysate Lane 3: A431 cell lysate Lane 4: NIH/3T3 cell lysate Lane 5: RAW264.7 cell lysate Lane 6: C6 cell lysate
Lysates/proteins at 20 µg/Lane.
Predicted band size: 33 kDa Observed band size: 33 kDa
Exposure time: 3 minutes; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA722437) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
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