Sequencing and characterization of the soybean leaf metalloproteinase: Structural and functional similarity to the matrix metalloproteinase family

• Published in: Plant physiology (Bethesda) Vol. 99; no. 3; pp. 1179 - 1183
• Main Authors: McGeehan, G. (Glaxco Research Institute, Research Triangle Park, NC), Burkhart, W, Anderegg, R, Becherer, J.D, Gillikin, J.W, Graham, J.S
• Format: Journal Article
• Language: English
• Published: Rockville, MD American Society of Plant Physiologists 01.07.1992
• Subjects: Agronomy. Soil science and plant productions; Amino acids; Biological and medical sciences; Collagens; COMPOSICION QUIMICA; COMPOSITION CHIMIQUE; Enzyme substrates; Enzymes; FEUILLE; Fundamental and applied biological sciences. Psychology; GLYCINE MAX; HOJAS; Hydrolysis; Metabolism; Metabolism and Enzymology; Plant physiology and development; PROTEASAS; PROTEASE; PROTEINAS; PROTEINE; Sequencing; Soybeans; Substrate specificity; Tissue inhibitor of metalloproteinases; Zinc; Purification; Enzyme; Plant leaf; Metabolic inhibitor; Glycine max; Oil plant(vegetal); Leguminosae; Enzymatic activity; Dicotyledones; Angiospermae; Isolation; Spermatophyta; Metalloproteinase; Aminoacid sequence
• ISSN: 0032-0889; 1532-2548
• DOI: 10.1104/pp.99.3.1179

A novel zinc endoproteinase has been sequenced and characterized from soybean leaves (Glycine max var Williams 82) and has been designated as Protein Identification Resource accession No. A41820 SMEP1 (soybean metalloendoproteinase 1). Comparison of the primary amino acid sequence with other zinc proteinases revealed the enzyme to be a new member of the matrix metalloproteinase (MMP) family of enzymes. SMEP was found to have MMP cleavage specificity toward peptide substrates and the enzyme is specifically inhibited by naturally occurring tissue inhibitors of MMPs through a high-affinity interaction (inhibitor concentration resulting in an approximate 50% decrease in enzyme activity = 23 X 10(-9) molar). Together, these results suggest that the origin of the MMP family of enzymes and their cognate inhibitors predates the divergence of plants and animals