Impact of typical surfactants on the collagenolytic and elastinolytic activities of proteases / Yanhong Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 7 (07/2015)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 7 (07/2015) . - p. 227-236 Titre : Impact of typical surfactants on the collagenolytic and elastinolytic activities of proteases Type de document : texte imprimé Auteurs : Yanhong Li, Auteur ; Fenfxiang Luo, Auteur ; Piyu Peng, Auteur ; Bingbing Xu, Auteur Année de publication : 2015 Article en page(s) : p. 227-236 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Collagène Cuirs et peaux -- Analyse Elastine Enzymes protéolytiques Une enzyme protéolytique est une enzyme capable de couper une protéine en plusieurs fragments ou peptides. La trypsine, la papaïne, la pepsine, la chymotrypsine, la plasmine, la subtilisine... sont capables de couper une protéine, chaque enzyme étant spécifique de certains sites particuliers de cette protéine. C'est ainsi, par exemple, qu'une immunoglobuline G est découpée par la papaïne en un fragment Fc et deux fragments Fab, comme l'a montré Porter en 1959. Peptidases Surfactants Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Most proteases exhibit broad-spectrum activities to all of the protein components of skins, thus, the indiscriminate application of proteases will bring out undue and non-selective loss of skin structural proteins, especially collagen and elastin, and lead to loose and damaged grain. Finding the effective ways to control proteases’ activities against collagen and elastin in leather processes is very important. In this work, the influence of typical surfactants on the collagenolytic and elastinolytic activities of frequently used proteases was investigated, and the mechanism was also discussed. The results indicated that the nonionic surfactants had slight effects and anionic surfactants exhibited quite different behaviors on the collagenolytic and elastinolytic activities of selected proteases. Both collagenolytic and elastinolytic activities of trypsin preparations were obviously inhibited by all selected anionic surfactants, especially SDS and SDBS. For the bacteria proteases, their elastinolytic activities were significantly activated and their collagenolytic activities were inhibited to a variable extent by anionic surfactants. Tanners may effectively control the selective action of proteases to collagen and elastin to achieve different requirements through correctly utilizing surfactants. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Preparation of hide powder-XBR - Preparation of surfactants solutions - Determination of collagenolytic and elastinolytic activities of proteases - RESULTS : Effects of surfactants on elastinolytic activities of proteases - Effects of surfactants on collagenolytic activities of proteases - DISCUSSION : Effects of nonionic surfactants on collagenolytic and elastinolytic activities of proteases - Effects of anionic surfactants on collagenolytic and elastinolytic activities of trypsin - Effects of anionic surfactants on collagenolytic activities of bacteria proteases - Effects of anionic surfactants on elastinolytic activities of bacteria proteases En ligne : https://drive.google.com/file/d/1SGEuhU_mzLwSOMFBXV-VW76c8QZGlyDf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24376 [article]

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