Purification and characterization of an efficient poultry feather degrading-protease from Myrothecium verrucaria.
The purpose of this work was to characterize an alkaline protease from the filamentous fungus Myrothecium verrucaria and to explore its capability to degrade native poultry feathers. The enzyme was purified to homogeneity using a single chromatographic step. Recovery was high, 62%, with a specific activity of 12,851.8 U/mg protein. The enzyme is a small monomeric protein with a molecular mass of 22 +/- 1.5 kDa. It presented pH optimum of 8.3 and was stable over a broad pH range (5.0-12.0). The temperature optimum was 37 degrees C, with thermal stability at temperatures up to 45 degrees C. The enzyme presented an efficiency of 80.3% in the degradation of poultry feather meal, releasing amino acids and soluble peptides. It was able to hydrolyze beta-keratin without necessity of chemical or enzymatic reduction of the disulphide bonds. Considering that, everyday, poultry-processing plants produce feathers as a waste products, this protease can be useful in biotechnological processes aiming to improve the transformation of poultry feathers through solubilization of beta-keratin into usable peptides. Furthermore, it can also be useful in processes aiming to reduce the environmental pollution caused by the accumulation of feathers.
Moreira-Gasparin
Fabiana G
FG
Departamento de Bioquímica, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, PR, 87020-900, Brazil.
de Souza
Cristina G Marques
CG
Costa
Andréa M
AM
Alexandrino
Ana Maria
AM
Bracht
Cissa K
CK
Boer
Cinthia G
CG
Peralta
Rosane M
RM
D000818:Animals; D001426:Bacterial Proteins / Q000302:isolation & purification* / Q000378:metabolism; D001673:Biodegradation, Environmental; D010450:Endopeptidases / Q000302:isolation & purification* / Q000378:metabolism; D004795:Enzyme Stability; D005241:Feathers / Q000378:metabolism; D006197:Hair / Q000378:metabolism; D006358:Hot Temperature; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006999:Hypocreales / Q000201:enzymology*; D007220:Industrial Waste; D007633:Keratins / Q000378:metabolism; D009262:Nails / Q000378:metabolism; D011200:Poultry; D011480:Protease Inhibitors / Q000494:pharmacology; D012756:Sheep; D013379:Substrate Specificity; D014935:Wool / Q000378:metabolism; D053800:beta-Keratins / Q000378:metabolism
D001426:Bacterial Proteins; D007220:Industrial Waste; D011480:Protease Inhibitors; D053800:beta-Keratins; D007633:Keratins; D010450:Endopeptidases; C087822:alkaline protease