Production, purification, and biochemical characterization of serine alkaline protease from Penicillium chrysogenium strain X5 used as excellent bio-additive for textile processing.
Int J Biol Macromol
; 119: 1002-1016, 2018 Nov.
Article
em En
| MEDLINE
| ID: mdl-30081129
ABSTRACT
A new ascomycete fungus X5, a hyperproducer (9000â¯U/mL) of a serine alkaline protease (SAPTEX) was identified as Penicillium chrysogenum. The experimental purification protocol comprises three steps:
heat treatment (10â¯min at 80⯰C) followed by an ammonium sulfate precipitation (30-50%)-dialysis, and a UNO Q-12 anion exchange chromatography using the FPLC system. The chemical characterizations performed include physico-chemical determination and spectroscopic analysis. The MALDI-TOF/MS analysis revealed that the purified enzyme was a monomer with a molecular mass of 43,074.11â¯Da. The 25 residue NH2-terminal sequence of the enzyme showed high homology with Penicillium proteases. The optimum pH and temperature values for protease activity were pHâ¯10 and 80⯰C, respectively. Compared to other proteases (SPTC; Flavourzyme® 500â¯L; Proteinase, type XXIII; Proteinase K; and Alcalase® 2.4â¯L), SAPTEX has the highest catalytic efficacy, hydrolysis degree, and a powerful stability toward some commercial detergents. According to morphological, physico-chemical [scanning electron microscopy (SEM), energy dispersive X-Ray analysis (EDX), and FTIR-Fourier transform infrared spectroscopy], and mechanical evaluation, SAPTEX has no destructive impact on fibers after the enzyme treatment and a very slight effect on textile support. Obtained results suggested that SAPTEX may be considered as a potential candidate as a protein stain removal product for textile supports.Palavras-chave
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Penicillium chrysogenum
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Endopeptidases
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Têxteis
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Proteínas de Bactérias
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Serina Proteases
Tipo de estudo:
Guideline
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Tunísia