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.
| Xyloglucan endo-transglycosylase C terminal domain | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 xyloglucan endotransglycosylase native structure. | |||||||||
| Identifiers | |||||||||
| Symbol | XET_C | ||||||||
| Pfam | PF06955 | ||||||||
| InterPro | IPR010713 | ||||||||
| SCOP2 | 1un1 / SCOPe / SUPFAM | ||||||||
| |||||||||
Function edit
Xyloglucan endo-transglycosylase (XET) is thought to be highly important during seed germination, fruit ripening, and rapid wall expansion.[1]
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.[2]
References edit
- ^ 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.