Mannanase enzymes, genes coding for them and a method for isolating the
genes, as well as a process for bleaching of lignocellulosic pulp
    1.
    发明授权
    Mannanase enzymes, genes coding for them and a method for isolating the genes, as well as a process for bleaching of lignocellulosic pulp 失效
    甘露聚糖酶,编码它们的基因和分离基因的方法,以及木质纤维素浆的漂白方法

    公开(公告)号:US5661021A

    公开(公告)日:1997-08-26

    申请号:US341568

    申请日:1994-11-22

    摘要: The present invention relates to a DNA sequence, which codes for endomannanase produced by fungi of the genus Trichoderma and transferred into a yeast or fungus strain induces that strain to produce endomannanase, as well as to a method for isolating genes coding for endomannanases. The invention also relates to vectors, yeast strains and fungal strains containing the DNA sequence. Furthermore, the invention provides an enzyme product containing at least one endomannanase, which contains at least one of the following endomannanases produced by fungi of the Trichoderma genus: an enzyme having mannanase activity and an isoelectric point (pI) of about 3.8, an enzyme having mannanase activity and a pI of about 4.1, an enzyme having mannanase activity and a pI of about 4.5, an enzyme having mannanase activity and a pI of about 5.4 and an enzyme having mannanase activity and a pI of about 6.5, the isoelectric points being determined by isoelectric focusing. The endomannanase enzyme and enzyme products according to the invention can be used for hydrolyzation of mannopolymers, in particular in connection with bleaching of lignocellulosic pulps.

    摘要翻译: PCT No.PCT / FI93 / 00219 Sec。 371日期:1994年11月22日 102(e)1994年11月22日日期PCT提交1993年5月24日PCT公布。 出版物WO93 / 24622 日期:1993年12月9日本发明涉及一种DNA序列,其编码由木霉属真菌产生并转移到酵母或真菌菌株中的内切葡聚糖酶诱导该菌株产生内切葡聚糖酶,以及分离基因编码方法 内分泌酶。 本发明还涉及含有DNA序列的载体,酵母菌株和真菌菌株。 此外,本发明提供一种含有至少一种含有甘露糖醛酸酶的酶产物,其含有由木霉属真菌产生的至少一种以下的甘露聚糖酶:具有约3.8的甘露聚糖酶活性和等电点(pI)的酶,其具有 甘露聚糖酶活性和约4.1的pI,具有约4.5的甘露聚糖酶活性和pI的酶,具有甘露聚糖酶活性和pI约为5.4的酶和具有约6.5的甘露聚糖酶活性和pI的酶,测定等电点 通过等电聚焦。 根据本发明的内切单体酶和酶产物可用于水解甘露聚合物,特别是与木质纤维素纸浆的漂白有关。

    Mannanase enzymes, genes coding for them and a method for isolating the
genes, as well as a process for bleaching of lignocellulosic pulp
    2.
    发明授权
    Mannanase enzymes, genes coding for them and a method for isolating the genes, as well as a process for bleaching of lignocellulosic pulp 失效
    甘露聚糖酶,编码它们的基因和分离基因的方法,以及木质纤维素浆的漂白方法

    公开(公告)号:US5854047A

    公开(公告)日:1998-12-29

    申请号:US911020

    申请日:1997-08-13

    摘要: The present invention relates to a DNA sequence, which codes for endomannanase produced by fungi of the genus Trichoderma and transferred into a yeast or fungus strain induces that strain to produce endomannanase, as well as to a method for isolating genes coding for endomannanases. The invention also relates to vectors, yeast strains and fungal strains containing the DNA sequence. Furthermore, the invention provides an enzyme product containing at least one endomannanase, which contains at least one of the following endomannanases produced by fungi of the Trichoderma genus: an enzyme having mannanase activity and an isoelectric point (pI) of about 3.8, an enzyme having mannanase activity and a pI of about 4.1, an enzyme having mannanase activity and a pI of about 4.5, an enzyme having mannanase activity and a pI of about 5.4 and an enzyme having mannanase activity and a pI of about 6.5, the isoelectric points being determined by isoelectric focusing. The endomannanase enzyme and enzyme products according to the invention can be used for hydrolyzation of mannopolymers, in particular in connection with bleaching of lignocellulosic pulps.

    摘要翻译: 本发明涉及一种DNA序列,其编码由木霉属真菌产生并转移到酵母或真菌菌株中的内切葡聚糖酶诱导该菌株产生胞外单胞菌素酶,以及分离编码内切甘露聚糖酶的基因的方法。 本发明还涉及含有DNA序列的载体,酵母菌株和真菌菌株。 此外,本发明提供一种含有至少一种含有甘露糖醛酸酶的酶产物,其含有由木霉属真菌产生的至少一种以下的甘露聚糖酶:具有约3.8的甘露聚糖酶活性和等电点(pI)的酶,其具有 甘露聚糖酶活性和约4.1的pI,具有约4.5的甘露聚糖酶活性和pI的酶,具有甘露聚糖酶活性和pI约为5.4的酶和具有约6.5的甘露聚糖酶活性和pI的酶,测定等电点 通过等电聚焦。 根据本发明的内切单体酶和酶产物可用于水解甘露聚合物,特别是与木质纤维素纸浆的漂白有关。

    Process for preparing mechanical pulp by treating the pulp with an
enzyme having cellobiohydralase activity
    3.
    发明授权
    Process for preparing mechanical pulp by treating the pulp with an enzyme having cellobiohydralase activity 失效
    通过用具有纤维二糖水解酶活性的酶处理纸浆来制备机械纸浆的方法

    公开(公告)号:US6099688A

    公开(公告)日:2000-08-08

    申请号:US513991

    申请日:1996-02-15

    CPC分类号: D21C5/005 D21B1/021

    摘要: An enzymatic process for treating coarse pulp with an enzyme having cellobiohydrolase activity to reduce the specific energy requirements of the pulp and improve the properties of the pulp. Cellobiohydrolase enzymes isolated from the species Trichoderma, Aspergillus, Phanerochaete, Penicillium, Streptomyces, Humicola or Bacillus can be used.

    摘要翻译: PCT No.PCT / FI94 / 00078 Sec。 371日期:1996年2月15日 102(e)日期1996年2月15日PCT 1994年3月3日PCT公布。 公开号WO94 / 20666 日期1994年9月15日一种用具有纤维二糖水解酶活性的酶处理粗浆的酶法,以降低纸浆的比能量需求并提高纸浆的性能。 可以使用从木霉属,曲霉属,Phanerochaete,青霉属,链霉菌属,腐质霉属或芽孢杆菌分离的纤维二糖水解酶。