| Xyloglucan endo-transglycosylase C terminal domain | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 xyloglucan endotransglycosylase native structure. | |||||||||
| Identifiers | |||||||||
| Symbol | XET_C | ||||||||
| Pfam | PF06955 | ||||||||
| InterPro | IPR010713 | ||||||||
| SCOP2 | 1un1 / SCOPe / SUPFAM | ||||||||
| |||||||||
In molecular biology, the xyloglucan endo-transglycosylase (XET) is an enzyme that is involved in the metabolism of xyloglucan, which is a component of plant cell walls. This enzyme is part of glycoside hydrolase family 16.
Function
Xyloglucan endo-transglycosylase (XET) is thought to be highly important during seed germination, fruit ripening, and rapid wall expansion.
Xyloglucan is the predominant hemicellulose in the primary cell walls of most dicotyledons. With cellulose, it forms a network that strengthens the cell wall. XET catalyses the splitting of xyloglucan chains and the linking of the newly generated reducing end to the non-reducing end of another xyloglucan chain, thereby loosening the cell wall.
References
- Baumann MJ, Eklöf JM, Michel G, Kallas AM, Teeri TT, Czjzek M, et al. (2007). "Structural evidence for the evolution of xyloglucanase activity from xyloglucan endo-transglycosylases: biological implications for cell wall metabolism". Plant Cell. 19 (6): 1947–63. doi:10.1105/tpc.107.051391. PMC 1955714. PMID 17557806.
- Schröder R, Atkinson RG, Langenkämper G, Redgwell RJ (February 1998). "Biochemical and molecular characterisation of xyloglucan endotransglycosylase from ripe kiwifruit". Planta. 204 (2): 242–51. Bibcode:1998Plant.204..242S. doi:10.1007/s004250050253. PMID 9487728. S2CID 24098211.