Enables identical protein binding activity. Acts upstream of or within behavioral response to pain and extracellular matrix organization. Located in basement membrane; extracellular region; and interstitial matrix. Is expressed in several structures, including adipose tissue; alimentary system; eye; genitourinary system; and respiratory system. Orthologous to human VWA1 (von Willebrand factor A domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]