Heterologously overexpressed, affinity‐purified human meprin α is functionally active and cleaves components of the basement membrane in vitro
- 28 December 1999
- journal article
- Published by Wiley in FEBS Letters
- Vol. 465 (1) , 2-7
- https://doi.org/10.1016/s0014-5793(99)01712-3
Abstract
Meprins are astacin-like metalloproteases of renal and intestinal epithelia and embryonic neuroepithelial cells. The full length cDNA of the human meprin α subunit has been overexpressed in baculovirus-infected insect cells yielding the tetrameric proprotein which could be proteolytically activated and affinity-purified to homogeneity. Recombinant meprin α hydrolyzes the synthetic substrate N-benzoyl-tyrosyl-p-aminobenzoic acid (PABA-peptide) and cleaves by limited proteolysis the basement membrane constituents laminin 1 and laminin 5. This supports a concept that meprin α, when basolaterally secreted by human colon carcinoma epithelial cells, increases the proteolytic capacity for tumor progression in the stromaKeywords
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