Studies on the Enzymes Produced by Basidiomycetes -Part II. Properties of Cellulase and Xylanase-

담자균(擔子菌)이 생산(生産)하는 효소(酵素)에 관(關)한 연구(硏究) -제2보(第二報) Cellulase 및 Xylanase의 성질(性質)-

Some properties of cellulase and xylanase produced from Pleurotus ostreatus 301 and Lentinus edodes 3-1 during its growth in rice straw medium were investigated. The cellulase activities of P. ostreatus 301 and L. edodes 3-1 were increased in proportion to substrate concentration within 0.6% and 0.8%, respectively, and xylanase activities of two strains were increased within 1%. The reducing sugar production of cellulase and xylanase in two strains were proportionaly increased until 30 min. and 60 min. respectively. The opium pH for cellulase activities of P. ostreatus 301 and L. edodes 3-1 were pH 4.0 and pH 4.5, respectively, and xylanase activities of two strains were pH 5.0. The stable pH range for cellulase activities of P. ostreatus 301 was within 4.0 to 6.0 and L. edodes 3-1 was within 3.0 to 5.0, Xylanase activities of P. ostreatus 301 was within 4.5 to 6.0 and L. edodes 3-1 was within 3.5 to 6.0. The optium temperature for cellulase activities of P. ostraeatus 301 and L. edodes 3-1 were $40^{\circ}C$ and $50^{\circ}C$, respectively, but xylanase activities of P. ostreatus 301 and L. edodes 3-1 were $50^{\circ}C$ and $45^{\circ}C$, respectively. Thermal stability of enzymes were below of optimum temperature and these were mostly inactivate at $70^{\circ}C$ for 10 min of the metalic ions tested, cellulase activities of L. edodes 3-1 was increased by $Co^{++},\; Mg^{++}$ at the concentration of $10^{-2}M$, but were greatly inhibited by $Hg^{++},\;Cu^{++}$ in two strains. Xylanase activities were increased by $Ca^{++},\;Co^{++},\;Mg^{++}$ and $Cd^{++}$ but was greatly inhibited by $Hg^{++}$.

Pleurotus ostreatus 301과 Lentinus edodes 3-1을 볏짚배지(培地)에 배양(培養)하여 배양중(培養中)에 생성(生成)된 cellulase와 xylanase의 성질(性質)을 검토(檢討)한 결과(結果) P. ostreatus 301의 cellulase 활성(活性)은 기질농도(基質濃度) 0.6%, L. edodes 3-1은 0.8%, xylanase는 양균주(兩菌株)에서 1%까지는 비례적(比例的)으로 증가(增加)하였다. 반응시간(反應時間)에 따른 환원당(還元糖)의 생성(生成)은 양균주(兩菌株)에서 cellulase는 60분(分), xylanase는 30분(分)까지 비례적(比例的)으로 증가(增加)하였다. 최적(最適) pH는cellulase에서 P. ostreatus 301은 pH 4.0, L. edodes 3-1은 pH 4.5이었으며 xylanase는 양균주(兩菌株)가 pH 5.0이었다. pH 안정범위(安定範圍)는 P. ostreatus 301의 cellulase에서 pH $4.0{\sim}6.0$, L. edoder 3-1은 pH $3.0{\sim}5.0$이었고 xylanase는 P. osteatus 301에서 pH $4.5{\sim}6.0$, L. edodes 3-1에서는 pH $3.5{\sim}6.0$이었다. 최적온도(最適溫度)는 P. ostreatus 301의 cellulase에서 $40^{\circ}C$, L. edodes 3-1의 xylanase는 $45^{\circ}C$이었고, L. edodes 3-1의 cellulas와 P. ostreatus 301의 xylanase는 $50^{\circ}C$ 이었으며 열안정성(熱安定性)은 최적온도(最適溫度) 이하이었고, $70^{\circ}C$, 10분(分)으로 대부분 실활(失活)되었다. 염류(鹽類)의 영향(影響)은 L. edodes 3-1의 cellulase는 $Co^{++},\; Mg^{++}$에 의해서 효소력(酵素力)이 증가(增加)되었으며,$Mg^{++},\;Cu^{++}$에 의해서는 양균주(兩菌株)에서 심한 조해(阻害)를 를 보였고 xylanase는 $Ca^{++},\;Co^{++},\;Mg^{++}\;Cd^{++}$ 등은 약간 증가(增加)를 보였고, $Hg^{++}$은 조해(阻害)가 심했다.