Characterization of a novel strain from Aspergillus aculeatinus: from rhamnogalacturonan Itype pectin degradation to the application for juice clarification
Résumé
In fruit juice industry, the high concentration of pectins can leads to colloids formation, which can
induce filter clogging during the process (Cameron et al., 2017), with consequent effect on the
yields of juice production. Four pectic domains can be described: Homogalacturonan (60%),
Xylogalacturonan (XGA), Rhamnogalacturonan II (RGII) and Rhamnogalacturonan I (30%) (Mohnen,
2008; Silva et al., 2016). Classical enzymatic cocktails used in industry are composed of pectin
methylesterase and polygalacturonase, both involved in HG degradation. These cocktails are
lacking enzymatic activities that can effectively degrade RGI-type pectins (RGI-ases). The aim of
this study was to assess the potential of one Aspergillus aculeatinus strain, O822, in secreting RGIdegrading
enzyme and its application potential for fruit processing industry.
Mots clés
RGL: rhamnogalacturonan lyase RHG: endo-rhamnogalacturonase PG: polygalacturonase GAN: Endo-β-1
4-galactanase Rha: α-L-rhamnosidase RGAE: Rhamnogalacturonase acetyl esterase
RGL: rhamnogalacturonan lyase RHG: endo-rhamnogalacturonase
PG: polygalacturonase
GAN: Endo-β-1
4-galactanase
Rha: α-L-rhamnosidase
RGAE: Rhamnogalacturonase acetyl esterase
Domaines
Sciences du Vivant [q-bio]
Fichier principal
Poster (2021) Characterization of a novel strain from Aspergillus aculeatinus.pdf (496.2 Ko)
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