PARTIAL CHARACTERIZATION OF BETA-GLUCOSIDASE ACTIVITY PRODUCED BY KLUYVEROMYCES-MARXIANUS IMB3 DURING GROWTH ON CELLOBIOSE-CONTAINING MEDIA AT 45-DEGREES-C

N BARRON, R Marchant, L MCHALE, Anthony McHale

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Abstract

We report- the partial characterization of a beta-glucosidase produced during growth of the thermotolerant yeast, K. marxianus IMB3 on lactose-containing media at 45 degrees C. The enzyme had Km values of 1.1 mM and 14.8 mM, for the substrates p-nitrophenyl-beta-D-glucoside and cellobiose, respectively. The enzyme had a pH optimum of 5.5 and was optimally active at 50 degrees C. It was stable up to 125 hours at 25 degrees C and 35 degrees, with half-lives of 45 hours and 2 hours at 45 degrees C and 50 degrees C, respectively. inactivated by Hg2+. Ethanol concentrations [1-10% (v/v)] had little effect an activity. Glucose (20 mM) caused inhibition when p-nitrophenyl-beta-D-glucoside was used as substrate, whereas lactose at similar concentrations had no effect.
LanguageEnglish
Pages1047-1050
JournalBiotechnology Letters
Volume17
Issue number10
Publication statusPublished - Oct 1995

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Kluyveromyces marxianus
cellobiose
beta-glucosidase
lactose
glucosides
enzymes
half life
ethanol
yeasts
glucose

Cite this

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title = "PARTIAL CHARACTERIZATION OF BETA-GLUCOSIDASE ACTIVITY PRODUCED BY KLUYVEROMYCES-MARXIANUS IMB3 DURING GROWTH ON CELLOBIOSE-CONTAINING MEDIA AT 45-DEGREES-C",
abstract = "We report- the partial characterization of a beta-glucosidase produced during growth of the thermotolerant yeast, K. marxianus IMB3 on lactose-containing media at 45 degrees C. The enzyme had Km values of 1.1 mM and 14.8 mM, for the substrates p-nitrophenyl-beta-D-glucoside and cellobiose, respectively. The enzyme had a pH optimum of 5.5 and was optimally active at 50 degrees C. It was stable up to 125 hours at 25 degrees C and 35 degrees, with half-lives of 45 hours and 2 hours at 45 degrees C and 50 degrees C, respectively. inactivated by Hg2+. Ethanol concentrations [1-10{\%} (v/v)] had little effect an activity. Glucose (20 mM) caused inhibition when p-nitrophenyl-beta-D-glucoside was used as substrate, whereas lactose at similar concentrations had no effect.",
author = "N BARRON and R Marchant and L MCHALE and Anthony McHale",
year = "1995",
month = "10",
language = "English",
volume = "17",
pages = "1047--1050",
journal = "Biotechnology Letters",
issn = "0141-5492",
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TY - JOUR

T1 - PARTIAL CHARACTERIZATION OF BETA-GLUCOSIDASE ACTIVITY PRODUCED BY KLUYVEROMYCES-MARXIANUS IMB3 DURING GROWTH ON CELLOBIOSE-CONTAINING MEDIA AT 45-DEGREES-C

AU - BARRON, N

AU - Marchant, R

AU - MCHALE, L

AU - McHale, Anthony

PY - 1995/10

Y1 - 1995/10

N2 - We report- the partial characterization of a beta-glucosidase produced during growth of the thermotolerant yeast, K. marxianus IMB3 on lactose-containing media at 45 degrees C. The enzyme had Km values of 1.1 mM and 14.8 mM, for the substrates p-nitrophenyl-beta-D-glucoside and cellobiose, respectively. The enzyme had a pH optimum of 5.5 and was optimally active at 50 degrees C. It was stable up to 125 hours at 25 degrees C and 35 degrees, with half-lives of 45 hours and 2 hours at 45 degrees C and 50 degrees C, respectively. inactivated by Hg2+. Ethanol concentrations [1-10% (v/v)] had little effect an activity. Glucose (20 mM) caused inhibition when p-nitrophenyl-beta-D-glucoside was used as substrate, whereas lactose at similar concentrations had no effect.

AB - We report- the partial characterization of a beta-glucosidase produced during growth of the thermotolerant yeast, K. marxianus IMB3 on lactose-containing media at 45 degrees C. The enzyme had Km values of 1.1 mM and 14.8 mM, for the substrates p-nitrophenyl-beta-D-glucoside and cellobiose, respectively. The enzyme had a pH optimum of 5.5 and was optimally active at 50 degrees C. It was stable up to 125 hours at 25 degrees C and 35 degrees, with half-lives of 45 hours and 2 hours at 45 degrees C and 50 degrees C, respectively. inactivated by Hg2+. Ethanol concentrations [1-10% (v/v)] had little effect an activity. Glucose (20 mM) caused inhibition when p-nitrophenyl-beta-D-glucoside was used as substrate, whereas lactose at similar concentrations had no effect.

M3 - Article

VL - 17

SP - 1047

EP - 1050

JO - Biotechnology Letters

T2 - Biotechnology Letters

JF - Biotechnology Letters

SN - 0141-5492

IS - 10

ER -