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Regular Paper

Production of high activity Aspergillus niger BCC4525 β-mannanase in Pichia pastoris and its application for mannooligosaccharides production from biomass hydrolysis

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Pages 2298-2305 | Received 16 Nov 2015, Accepted 04 Aug 2016, Published online: 20 Sep 2016

Figures & data

Table 1. Purification of the recombinant β-mannanase from BCC4525.

Fig. 1. Expression of the recombinant MANF3 in KM71 P. pastoris and its characterization. (A) Effect of pH on recombinant BCC4525 β-mannanase activity was determined at different pH values by incubating the enzyme at 70 °C for 10 min in the following buffers; sodium acetate buffer pH 3–6 (closed diamond,

), sodium citrate buffer pH 5–6 (open square,
), sodium phosphate buffer pH 6–8 (open triangle,
), Tris–HCl buffer pH 8–10 (cross,
). (B) Effect of temperature on recombinant BCC4525 β-mannanase activity was determined by incubating the enzyme for 10 min at different temperatures. (C) thermal stability test was carried out by incubating the enzyme at 50 °C (closed diamond,
), 60 °C (open square,
), 70 °C (closed triangle,
), 80 °C (cross,
) or 90 °C (closed circle,
) for 0.5, 1, 1.5, and 2 h before the remaining activity was assayed. (D) Thermal stability test at 90 °C (closed diamond,
) and 100 °C (open square,
) was carried out for 15–60s.

Notes: Values shown are mean ± SD from three independent experiments.
Fig. 1. Expression of the recombinant MANF3 in KM71 P. pastoris and its characterization. (A) Effect of pH on recombinant BCC4525 β-mannanase activity was determined at different pH values by incubating the enzyme at 70 °C for 10 min in the following buffers; sodium acetate buffer pH 3–6 (closed diamond, Display full size), sodium citrate buffer pH 5–6 (open square, Display full size), sodium phosphate buffer pH 6–8 (open triangle, Display full size), Tris–HCl buffer pH 8–10 (cross, Display full size). (B) Effect of temperature on recombinant BCC4525 β-mannanase activity was determined by incubating the enzyme for 10 min at different temperatures. (C) thermal stability test was carried out by incubating the enzyme at 50 °C (closed diamond, Display full size), 60 °C (open square, Display full size), 70 °C (closed triangle, Display full size), 80 °C (cross, Display full size) or 90 °C (closed circle, Display full size) for 0.5, 1, 1.5, and 2 h before the remaining activity was assayed. (D) Thermal stability test at 90 °C (closed diamond, Display full size) and 100 °C (open square, Display full size) was carried out for 15–60s.

Fig. 2. Hydrolysis of PKM and CM by the recombinant BCC4525 β-mannanase for MOS production. Hydrolysis of PKM (A) and CM (B) was carried out at various time intervals before the reaction products were detected by TLC.

Notes: M1–M6 indicates mannooligosaccharides from mannose to mannohexose. Numbers at the bottom of the graph indicate time of hydrolysis.
Fig. 2. Hydrolysis of PKM and CM by the recombinant BCC4525 β-mannanase for MOS production. Hydrolysis of PKM (A) and CM (B) was carried out at various time intervals before the reaction products were detected by TLC.

Table 2. The amount of released reducing sugarsTable Footnotea from the digesta fluid obtained from in vitro digestibility test.

Supplemental material

TBBB_1230003_Supplementary_Material.pdf

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