InterPro domain: IPR034086
General Information
- Identifier IPR034086
- Description Pectinesterase inhibitor, plant
- Number of genes 779
- Gene duplication stats Loading...
- Associated GO terms GO:0043086 GO:0046910
Abstract
This entry represents pectinesterase inhibitors (also known as pectin methylesterase inhibitor, PMEI) from plants.
Pectin methylesterase (PME; Pectinesterase) catalyzes the demethylesterification of homogalacturonans in the cell wall. Its activity is regulated by the proteinaceous PME inhibitor (PMEI) which inhibits PME and invertase through formation of a non-covalent 1:1 complex [ 1 ]. Depending on the mode of demethylesterification [ 2 ], PMEI activity results in either loosening or rigidification of the cell wall. PMEI has been implicated in the regulation of fruit development, carbohydrate metabolism and cell wall extension. It may also be involved in inhibiting microbial pathogen PMEs. Thus, PMEI probably plays an important physiological role in PME regulation in plants, possessing several potential applications in a food-technological context [ 3 ].
1. Pectin methylesterase inhibitor. Biochim. Biophys. Acta 1696, 245-52
2. Pectin methylesterase and its proteinaceous inhibitor: a review. Carbohydr. Res. 345, 2583-95