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Título: | Biochemical study of the extracellular aspartyl protease Eap1 from the phytopathogen fungus Sporisorium reilianum |
Autor: | Mandujano-González, Virginia; Arana-Cuenca, A.; Anducho-Reyes, Miguel Ángel; Tellez Jurado, Alejandro; González Becerra, Aldo E. CSIC; Mercado-Flores, Yuridia | Palabras clave: | Phytopathogenic fungus Aspartyl protease Sporisorium reilianum |
Fecha de publicación: | 2013 | Editor: | Academic Press | Citación: | Protein Expression and Purification 92: 214- 222 (2013) | Resumen: | In this work, the extracellular protease Eap1 from Sporisorium reilianum was characterized in solid and liquid cultures using different culture media. The results showed that Eap1 was produced in all media and under all culture conditions, with the most activity in solid culture at an acidic pH of 3-5. Following purification, the 41 kDa protease demonstrated aspartyl protease activity. The enzyme was stable at a wide range of temperatures and pH values, but 45 C and pH 3 were optimal. The Km and Vmax values obtained were 0.69 mg/mL and 0.66 μmol/min, respectively, with albumin as the substrate. Eap1 degraded hemoglobin as well as proteins obtained from corn germ, roots, stems and slides at pH 3 and also had milk-clotting activity. Sequencing analysis showed that this protein has 100% similarity to the peptide sequence theoretically obtained from the sr11394 gene, which encodes an aspartyl protease secreted by S. reilianum. © 2013 Elsevier Ltd. All rights reserved. | URI: | http://hdl.handle.net/10261/95612 | DOI: | 10.1016/j.pep.2013.10.003 | Identificadores: | doi: 10.1016/j.pep.2013.10.003 issn: 1046-5928 |
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