InterPro domain: IPR044654

This family includes group B of Fasciclin-like arabinogalactan proteins (FLAs) from Arabidopsis, which includes FLA 15, 16, 17, 18 [ 1 ]. They are expressed throughout plant development. FLAs are extracellular glycoproteins containing the Fascilin 1 (FAS1) domains and glycomotif regions, thought to play structural and signalling functions through a wide range of interactions in the plant extracellular matrix [ 2 , 3 ].

Group B of FLAs contains two FAS1 domains (fasciclin domain types R-H), not predicted to be GPI-anchored, and its domain architecture is one of the most stable throughout plant evolution. FLA16 is group B most highly expressed FLA in the stem and it is predominantly found in inflorescence tissues, including the stem, branch, flower and silique. It plays a role in plant secondary cell wall synthesis and function [ 3 ].

1. Fasciclin-Like Arabinogalactan-Protein 16 (FLA16) Is Required for Stem Development in Arabidopsis. Front Plant Sci 11, 615392
2. Fasciclin-like arabinogalactan proteins: specialization for stem biomechanics and cell wall architecture in Arabidopsis and Eucalyptus. Plant J. 62, 689-703