Novel protease inhibitors active against human neutrophil elastase and plasma kallikrein with therapeutic potentialities: Structure-function relationships



Título del documento: Novel protease inhibitors active against human neutrophil elastase and plasma kallikrein with therapeutic potentialities: Structure-function relationships
Revista: Biotecnología aplicada
Base de datos: PERIÓDICA
Número de sistema: 000353534
ISSN: 0864-4551
Autores: 1
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3
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Instituciones: 1Universidad de La Habana, Facultad de Biología, La Habana. Cuba
2Centro de Ingeniería Genética y Biotecnología, División de Química-Física, La Habana. Cuba
3Universidade Federal de Sao Paulo, Instituto de Farmacologia e Biologia Molecular, Sao Paulo. Brasil
Año:
Volumen: 27
Número: 4
Paginación: 311-313
País: Cuba
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés Two new protease inhibitors (PIs), CmPI-II and AdKI were purified and characterized from mollusks Cenchritis muricatus and Aplysia dactylomela, respectively. They showed different specificities, CmPI-II for human neutrophil elastase (HNE) and AdKI for human plasma kallikrein (HPK). Purification procedures were established, rendering good yields and high purification degree. CmPI-II (UNIPROT: P84755) is a 5480 Da polypeptide of three disulphide bridges belong to the “non-classical” Kazal-type inhibitors. A new group was proposed according to the location of the CysI-CysV disulfide bridge. The presence of a basic residue at the inhibitor active site changed the pre-established requirement of a hydrophobic residue for elastase inhibition. The three-dimensional CmPI-II/HNE complex model contributes to explain the CmPI-II specificity for the enzyme. This is the first PI molecule isolated from C. muricatus. On the other hand, AdKI (2.9 kDa polypeptide) is an exception among invertebrate inhibitors in terms of inhibitory strength and selectivity against HPK. A new serine protease, AdSP, was also purified and characterized from the same extract, which could be the target for AdKI. CmPI-II and AdKI are the first inhibitors isolated from the phyllum Mollusca against ENH and HPK, respectively
Disciplinas: Medicina
Palabras clave: Farmacología,
Bioquímica,
Proteasas,
Inhibidores enzimáticos,
Elastasa,
Calicreína
Keyword: Medicine,
Pharmacology,
Biochemistry,
Proteases,
Enzymatic inhibitors,
Elastase,
Kallikrein
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