Gw. Laurie et al., IMMUNOLOGICAL AND PARTIAL SEQUENCE IDENTITY OF MOUSE BM180 WITH WHEATALPHA-GLIADIN, Biochemical and biophysical research communications, 217(1), 1995, pp. 10-15
BM180, a novel 180-kDa basement membrane protein enriched in guanidine
-HCl extracts of lacrimal and parotid exocrine secretory glands, was i
mmunopurified using the secretion inhibitory monoclonal antibody 3E12.
The N-terminal amino acid sequence was found to be VRVPVPQLQPQNP. An
identical sequence comprises the N-terminus of the wheat storage prote
in alpha-gliadin. The presence of a gliadin-like protein in basement m
embranes was confirmed using a monoclonal and several polyclonal anti-
gliadin antibodies, the former of which detected a 180-kDa protein in
basement membrane blots. A full-length alpha-gliadin cDNA was found to
hybridize at high stringency with mouse and human genomic DNA; and in
lacrimal gland Northern blots with a 2.3-kb message. Since BM180 appe
ars to be required for stimulus-secretion coupling by lacrimal acinar
cells, circulating anti-alpha-gliadin antibodies associated with Sjogr
en's syndrome ('Dry Eye') and more commonly in Coeliac disease, may be
secretion inhibitory. (C) 1995 Academic Press. Inc.