Cathode-luminescence study of photonic crystal green InxGa1−xN/InyGa1−yN light emitting diodes

Properties and structures of commercial polygalacturonase with ultrasound treatment: role of ultrasound in enzyme activation

“…Enthalpy strongly depends on enzyme structures, such as the formation and disruption of hydrogen bond and hydrophobic cores. 32 According to previous reports, 17,33 the stable structure of PG is generally held by hydrogen and disulde bonds. Therefore, the 48.65% decrease in DH can be attributed to the ultrasound-induced structural extension of PG, probably including the decomposition of hydrogen bonds and the internal hydrophobic cores, which resulted in the collapse of the ground-state conformations of the protein.…”

“…14 Polygalacturonase (PG; EC 3.2.1.15) is a member of the pectinase family that can randomly hydrolyse the a-(1-4) glycosidic bonds of de-esteried pectate into small segments. 17 It is one of the most commonly used enzymes during fruit and vegetable processing in the food industry, because of its high enzyme activity and optimum operating conditions at a low pH range. 18 However, applications of PG under high temperatures are oen restricted by its poor heat tolerance.…”

Crystallization, X-ray diffraction analysis and preliminary structure determination of the polygalacturonase PehA fromAgrobacterium vitis

“…The other bacterial PG is an exopolygalacturonase from Yersinia enterocolitica (PDB codes 2uve and 2uvf; Abbott & Boraston, 2007). The fungal PGs are all endopolygalacturonases: PDB entries 1ia5 and 1ib4 from Aspergillus aculeatus (Cho et al, 2001), 1hg8 from Fusarium moniliforme (Federici et al, 2001), 1k5c, 1kcc and 1kcd from Stereum purpureum (Shimizu et al, 2002), 1nhc from Aspergillus niger (van Pouderoyen et al, 2003) and 1czf from A. niger (van Santen et al, 1999). All of the structures fold in a righthanded parallel -helix, a common fold among pectolytic enzymes.…”