Modulates cell-to-cell trafficking. (Microbial infection) Interacts with Grapevine fanleaf virus (GFLV) 2B-MP. Co-localizes with the Grapevine fanleaf virus (GFLV) 2B-MP at the base of tubules within modified plasmodesmata. Highly expressed in lateral root and elongation zone. Belongs to the cysteine-rich repeat secretory protein family. Plasmodesmata-located proteins (PDLD) subfamily. PDLPs were initially named Cysteine-rich secretory proteins based on a classification work that failed to predict the transmembrane region at the C-terminus (PubMed:11402176). However, it was later shown that PDLPs are membrane proteins.