Protein family
In molecular biology , the X8 domain , is thought to play a role in targeting the plasmodesmata by providing it with structural support. The domain is able to do this since it contains signal sequences for a glycosylphosphatidylinositol (GPI) linkage to the extracellular face of the plasma membrane. This domain is involved in carbohydrate binding .[ 1]
Structure
The X8 domain [ 2] conserved cysteine residues that presumably form three disulphide bridges. The domain is also found in an Olive pollen allergen [ 3] glycosyl hydrolases .[ 4]
References
^ Simpson C, Thomas C, Findlay K, Bayer E, Maule AJ (2009). "An Arabidopsis GPI-anchor plasmodesmal neck protein with callose binding activity and potential to regulate cell-to-cell trafficking" . Plant Cell . 21 (2): 581–94. doi :10.1105/tpc.108.060145 . PMC 2660613 PMID 19223515 . ^ Henrissat B, Davies GJ (December 2000). "Glycoside hydrolases and glycosyltransferases. Families, modules, and implications for genomics" . Plant Physiol . 124 (4): 1515–9. doi :10.1104/pp.124.4.1515 . PMC 1539306 PMID 11115868 . ^ Barral P, Batanero E, Palomares O, Quiralte J, Villalba M, RodrÃguez R (March 2004). "A major allergen from pollen defines a novel family of plant proteins and shows intra- and interspecies [correction of interspecie] cross-reactivity" . J. Immunol . 172 (6): 3644–51. doi :10.4049/jimmunol.172.6.3644 PMID 15004167 . ^ Henrissat B, Coutinho PM, Davies GJ (September 2001). "A census of carbohydrate-active enzymes in the genome of Arabidopsis thaliana". Plant Mol. Biol . 47 (1–2): 55–72. doi :10.1007/978-94-010-0668-2_4 . ISBN 978-94-010-3861-4 PMID 11554480 .