Trichome birefringence-like (TBL) proteins are proposed to encode wall poly-saccharide specific O-acetyltransferases. This entry includes TBL28, TBL29 and TBL30. TBL29, also known as ESKIMO 1 (ESK1), is the only characterised one in this entry. In Arabidopsis, ESK1 (AT3G55990) mediates 2-O- and 3-O-acetylation of xylosyl residues in xylan. Its role is essential for the production of functional xylem vessels. It functions as a negative regulator of cold acclimation, and mutations in the ESK1 gene provides strong freezing tolerance.
Taxonomy/Path:
InterPro : Trichome birefringence-like family / Protein trichome birefringence-like 28/30/ESKIMO 1