CN104946614A - 一种重组木聚糖酶的制备及其应用于木薯渣降解的方法 - Google Patents

一种重组木聚糖酶的制备及其应用于木薯渣降解的方法 Download PDF

Info

Publication number
CN104946614A
CN104946614A CN201510340887.3A CN201510340887A CN104946614A CN 104946614 A CN104946614 A CN 104946614A CN 201510340887 A CN201510340887 A CN 201510340887A CN 104946614 A CN104946614 A CN 104946614A
Authority
CN
China
Prior art keywords
xylanase
recombinant
recombinant xylanase
expression vector
dsm19732
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510340887.3A
Other languages
English (en)
Other versions
CN104946614B (zh
Inventor
唐蕾
胡方觊
王荣
余嘉慧
张建华
张宏建
毛忠贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangnan University
Original Assignee
Jiangnan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangnan University filed Critical Jiangnan University
Priority to CN201510340887.3A priority Critical patent/CN104946614B/zh
Publication of CN104946614A publication Critical patent/CN104946614A/zh
Application granted granted Critical
Publication of CN104946614B publication Critical patent/CN104946614B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/14Hydrolases (3)
    • C12N9/24Hydrolases (3) acting on glycosyl compounds (3.2)
    • C12N9/2402Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
    • C12N9/2477Hemicellulases not provided in a preceding group
    • C12N9/248Xylanases
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/14Hydrolases (3)
    • C12N9/24Hydrolases (3) acting on glycosyl compounds (3.2)
    • C12N9/2402Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
    • C12N9/2477Hemicellulases not provided in a preceding group
    • C12N9/248Xylanases
    • C12N9/2482Endo-1,4-beta-xylanase (3.2.1.8)
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00Preparation of compounds containing saccharide radicals
    • C12P19/14Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12YENZYMES
    • C12Y302/00Hydrolases acting on glycosyl compounds, i.e. glycosylases (3.2)
    • C12Y302/01Glycosidases, i.e. enzymes hydrolysing O- and S-glycosyl compounds (3.2.1)
    • C12Y302/01008Endo-1,4-beta-xylanase (3.2.1.8)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Enzymes And Modification Thereof (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

本发明属于生物工程技术领域,涉及一种重组木聚糖酶的制备以及应用该重组木聚糖酶降解木薯渣的方法。本发明将Clostridium clariflavum DSM19732的木聚糖酶基因与质粒pET-28a连接,转化大肠杆菌BL21,诱导表达,细胞破碎得到重组木聚糖酶,将该酶处理木薯渣,降低了木薯渣中纤维素和半纤维素的含量。用该方法制备的重组木聚糖酶,具有良好的酶学性质,处理木薯渣后可提高木薯渣中木质纤维素的降解效率。

Description

一种重组木聚糖酶的制备及其应用于木薯渣降解的方法
技术领域
本发明属于生物工程技术领域,具体涉及一种重组木聚糖酶的制备,以及利用该重组木聚糖酶降解木薯渣的方法。
背景技术
木聚糖酶是指能够专一降解木聚糖为低聚木糖和木糖的一类酶的总称,由于木聚糖是植物半纤维的主要成分,在自然界中广泛存在,无论是作为工业生产原料或加工副产物中的木聚糖,其有效降解都具有十分重要的意义。因此从六十年代起,人们就已经关注木聚糖酶的研究,涉及领域包括食品、饲料、造纸、能源工业等方面。
目前,木聚糖酶产生菌包括真菌、细菌及基因工程菌,不同来源的木聚糖酶其酶学性质和底物的专一性有所不同,因此针对不同需要,选择相应的木聚糖酶才能充分发挥酶解作用。
木薯是世界三大薯类作物之一,作为工业原料,其加工后产生大量的残渣。木薯渣的累积不仅造成资源的浪费,而且会对环境造成污染。木薯渣中含有大量的木质纤维素资源,如能将其有效利用,则可变费为利,但目前对木薯渣中半纤维素的降解尚无高效的方法。Clostridium clariflavum DSM19732能够以木薯渣为底物,在55℃下生长良好,推测该菌应具有相应的半纤维素降解酶系,而针对其所产木聚糖酶尚无文献报道。
因此,开发Clostridium clariflavum DSM19732木聚糖酶,并将其用于木薯渣中木质纤维素的降解,具有一定的经济和社会效益。
发明内容
本发明的一个目的在于获得重组Clostridium clariflavum DSM19732木聚糖酶的制备方法,开发新型木聚糖酶。
本发明的另一个目的是应用上述重组木聚糖酶处理木薯渣,提高木薯渣中木质纤维素的降解效率,解决木薯渣中木质纤维素资源利用率低的问题。
为了实现上述目的,本发明采用了以下技术方案:
1)目的木聚糖酶基因的获得:用细菌基因组DNA提取试剂盒提取含有Clostridium clariflavum DSM19732的基因组,得到基因组DNA溶液;
2)重组表达载体的构建:根据数据库中报道的Clostridium clariflavumDSM19732木聚糖酶基因序列设计带有限制性内切酶BamH I和Not I的引物,以步骤1)所得基因组DNA溶液为模板,进行PCR扩增,并对扩增产物进行纯化,然后用限制性内切酶BamH Ⅰ和Not Ⅰ双酶切已纯化的PCR产物和质粒pET-28a,用T4连接酶16℃过夜连接,得到重组表达载体;
3)重组木聚糖酶的诱导表达:将步骤2)中所得到的重组表达载体转化到大肠杆菌BL21感受态细胞中,培养细胞,诱导重组木聚糖酶的表达;
4)诱导重组木聚糖酶的表达条件:菌体生长OD600值为0.6-1.6;诱导剂IPTG浓度为0.05-1mmol/L;诱导温度为16-37℃;诱导时间为4-8h;
5)重组木聚糖酶液制备:收获步骤4)的菌体,8000-10000rpm离心15-20min,沉淀用20mmol/L、pH 6.0-7.5Tris-HCl缓冲液重悬,混匀后超声破碎10-15min,之后8000-10000rpm离心15-20min,取上清液即为木聚糖酶液;
6)重组木聚糖酶应用于木薯渣降解:在20目的木薯渣中加入质量体积比浓度为1%-3%的20mmol/L、pH 6.0-7.5Tris-HCl缓冲液,加入100-400U步骤5)的酶液及100-5000U纤维素酶,55-60℃恒温48-96h,测量木薯渣中纤维素、半纤维素含量以及木薯渣的失重率。
以上技术方案中所有基本分子生物学操作均参照“分子克隆实验指南”(第三版,科学出版社,2002年)。
1个酶活单位(U)定义为在给定条件下,每分钟降解1%的木聚糖溶液生成1μmol还原糖需要的酶量。
所得重组木聚糖酶具有以下特性:
1)最适反应温度
在40-80℃表现出催化活力,最适反应温度为60℃;
2)最适反应pH
在pH4-8范围内表现出催化活力,最适pH为6.0;
3)热稳定性
在40-60℃表现出很好的热稳定性,60℃保温30min,活力仍保持在90%以上;
4)pH稳定性
在pH 5-8具有良好的稳定性,pH8,4℃保持60min,仍保持90%的酶活力。
木薯渣的处理效果:与仅添加纤维素酶相比,同时添加重组木聚糖酶与纤维素酶,木薯渣失重率提高5%-10%;木薯渣中纤维素含量降低2-5%;半纤维素含量降低2-7%。
本发明采用的重组木聚糖酶的制备方法,较从Clostridium clariflavumDSM19732中直接获取木聚糖酶,重组大肠杆菌细胞易于培养,产酶周期短。
与仅添加纤维素酶处理木薯渣的工艺相比,添加本发明制备的木聚糖酶,可降低木薯渣中纤维素和半纤维素含量。
实施例1
重组木聚糖酶的制备,具体如下:
1)目的木聚糖酶基因的获得:用细菌基因组DNA提取试剂盒提取含有Clostridium clariflavum DSM19732的基因组,得到基因组DNA溶液;
2)重组表达载体的构建:根据数据库中报道的Clostridium clariflavumDSM19732木聚糖酶基因序列设计带有限制性内切酶BamH I和Not I的引物以步骤1)所得基因组DNA溶液为模板,进行PCR扩增,并对扩增产物进行纯化,然后用限制性内切酶BamH Ⅰ和Not Ⅰ双酶切已纯化的PCR产物和质粒pET-28a,用T4连接酶16℃过夜连接,得到重组表达载体;
3)重组木聚糖酶的获得:将步骤2)中所得到的重组表达载体转化到大肠杆菌BL21感受态细胞中进行培养,当OD600为1.25时,添加终浓度为0.1mmol/L的诱导剂IPTG,23℃诱导6h,8000rpm离心15min,收集菌体,并用20mmol/L、pH 7.0Tris-HCl缓冲液重悬,混匀后超声破碎10min,之后8000rpm离心15min,取上清液,即得到15.2U/mg蛋白的木聚糖酶液。
实施例2
利用本发明得到的重组木聚糖酶处理木薯渣,具体如下:
在20目的木薯渣中加入质量体积比浓度为1%的20mmol/L、pH 7.0Tris-HCl缓冲液,加入270U的重组木聚糖酶液及4000U纤维素酶,55℃恒温96h,较仅添加纤维素酶处理效果相比,木薯渣的失重率增加了9%,纤维素含量下降了2.5%,半纤维素含量下降了4%。

Claims (2)

1.一种重组木聚糖酶的制备方法,其特征在于,包括以下步骤:
步骤一、用细菌基因组DNA提取试剂盒提取含有Clostridium clariflavumDSM19732的基因组,得到基因组DNA溶液;
步骤二、根据数据库中报道的Clostridium clariflavum DSM19732木聚糖酶基因序列设计引物,以步骤一所得基因组DNA溶液为模板,进行PCR扩增,得到木聚糖酶基因,并与质粒pET-28a连接,得到重组表达载体;
步骤三、将步骤二中所得到的重组表达载体转化到大肠杆菌BL21感受态细胞中,培养细胞,诱导重组木聚糖酶的表达;
步骤四、收集步骤三中的菌体细胞,用pH 6.0-7.5的Tris-HCl缓冲液重新悬浮,超声破碎细胞并离心,取上清即为木聚糖酶液。
2.一种如权利要求1所述的重组木聚糖酶应用于木薯渣降解的方法,其特征在于,在20目的木薯渣中加入质量体积比浓度为1%-3%pH6.0-7.5的Tris-HCl缓冲液,加入100-400U重组木聚糖酶及100-5000U纤维素酶,55-60℃恒温48-96h。
CN201510340887.3A 2015-06-18 2015-06-18 一种重组木聚糖酶的制备及其应用于木薯渣降解的方法 Active CN104946614B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510340887.3A CN104946614B (zh) 2015-06-18 2015-06-18 一种重组木聚糖酶的制备及其应用于木薯渣降解的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510340887.3A CN104946614B (zh) 2015-06-18 2015-06-18 一种重组木聚糖酶的制备及其应用于木薯渣降解的方法

Publications (2)

Publication Number Publication Date
CN104946614A true CN104946614A (zh) 2015-09-30
CN104946614B CN104946614B (zh) 2018-11-02

Family

ID=54161679

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510340887.3A Active CN104946614B (zh) 2015-06-18 2015-06-18 一种重组木聚糖酶的制备及其应用于木薯渣降解的方法

Country Status (1)

Country Link
CN (1) CN104946614B (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106190935A (zh) * 2016-07-13 2016-12-07 江南大学 一种产木聚糖酶的重组菌及其应用
CN106834408A (zh) * 2017-03-20 2017-06-13 江西农业大学 一种猪粪和稻秆协同高效厌氧消化的方法
CN107619823A (zh) * 2017-10-30 2018-01-23 梁方方 具有抗抑制活性的重组木聚糖酶XynB及其应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402963A (zh) * 2008-11-14 2009-04-08 南开大学 耐高温木聚糖酶XynA1和编码该酶的基因与应用
CN103981223A (zh) * 2014-05-29 2014-08-13 湖南尔康制药股份有限公司 一种木薯渣发酵制备乙醇的方法
WO2015021930A1 (zh) * 2013-08-15 2015-02-19 中国科学院上海生命科学研究院 一种内切木聚糖酶及其编码基因和应用
CN104388450A (zh) * 2014-12-10 2015-03-04 江南大学 一种gh11耐热木聚糖酶基因的异源表达

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402963A (zh) * 2008-11-14 2009-04-08 南开大学 耐高温木聚糖酶XynA1和编码该酶的基因与应用
WO2015021930A1 (zh) * 2013-08-15 2015-02-19 中国科学院上海生命科学研究院 一种内切木聚糖酶及其编码基因和应用
CN103981223A (zh) * 2014-05-29 2014-08-13 湖南尔康制药股份有限公司 一种木薯渣发酵制备乙醇的方法
CN104388450A (zh) * 2014-12-10 2015-03-04 江南大学 一种gh11耐热木聚糖酶基因的异源表达

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAVIER A. IZQUIERDO1,ET AL.: "Complete Genome Sequence of Clostridium clariflavum DSM 19732", 《STANDARDS IN GENOMIC SCIENCES》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106190935A (zh) * 2016-07-13 2016-12-07 江南大学 一种产木聚糖酶的重组菌及其应用
CN106834408A (zh) * 2017-03-20 2017-06-13 江西农业大学 一种猪粪和稻秆协同高效厌氧消化的方法
CN106834408B (zh) * 2017-03-20 2019-10-25 江西农业大学 一种猪粪和稻秆协同高效厌氧消化的方法
CN107619823A (zh) * 2017-10-30 2018-01-23 梁方方 具有抗抑制活性的重组木聚糖酶XynB及其应用

Also Published As

Publication number Publication date
CN104946614B (zh) 2018-11-02

Similar Documents

Publication Publication Date Title
Hernández et al. Saccharification of carbohydrates in microalgal biomass by physical, chemical and enzymatic pre-treatments as a previous step for bioethanol production
Singhania et al. Bioethanol production from wheat straw via enzymatic route employing Penicillium janthinellum cellulases
Cheng et al. Hydrolysis of lignocellulosic feedstock by novel cellulases originating from Pseudomonas sp. CL3 for fermentative hydrogen production
Saini et al. Enhanced cellulase production by Penicillium oxalicum for bio-ethanol application
Shanmugam et al. Enhanced bioconversion of hemicellulosic biomass by microbial consortium for biobutanol production with bioaugmentation strategy
Xin et al. Characterization of a thermostable xylanase from a newly isolated Kluyvera species and its application for biobutanol production
Wingreini et al. Effect of reduction in yeast and enzyme concentrations in a simultaneous-saccharification-and-fermentation-based bioethanol process: technical and economic evaluation
Hu et al. Improved in situ saccharification of cellulose pretreated by dimethyl sulfoxide/ionic liquid using cellulase from a newly isolated Paenibacillus sp. LLZ1
Cunha et al. Three-phasic fermentation systems for enzyme production with sugarcane bagasse in stirred tank bioreactors: Effects of operational variables and cultivation method
Saini et al. Improvement of wheat straw hydrolysis by cellulolytic blends of two Penicillium spp.
CN104560927A (zh) 一种突变的精氨酸脱亚胺酶及其制备方法和应用
CN101608192B (zh) 一种利用玉米芯生产丁二酸的方法
Liu et al. Production of bioethanol from Napier grass via simultaneous saccharification and co-fermentation in a modified bioreactor
CN102174433A (zh) 一株高抗逆性贝氏梭菌及其应用
Ottenheim et al. Hemicellulase production by Aspergillus niger DSM 26641 in hydrothermal palm oil empty fruit bunch hydrolysate and transcriptome analysis
CN104946614A (zh) 一种重组木聚糖酶的制备及其应用于木薯渣降解的方法
Wang et al. Isolation and characterization of Shigella flexneri G3, capable of effective cellulosic saccharification under mesophilic conditions
CN106232826A (zh) 生产发酵产品的方法
CN102559567A (zh) 嗜热内切木聚糖酶基因工程菌的构建及其酶的应用
Pirota et al. Saccharification of biomass using whole solid‐state fermentation medium to avoid additional separation steps
Almeida et al. β‐Glucosidase produced by Moniliophthora perniciosa: Characterization and application in the hydrolysis of sugarcane bagasse
Avchar et al. Buffalo rumen harbours diverse thermotolerant yeasts capable of producing second-generation bioethanol from lignocellulosic biomass
Liu et al. Effect of different carbon sources on cellulase production by marine strain Microbulbifer hydrolyticus IRE-31-192
CN103865868A (zh) 基于木聚糖酶的工程菌及其实现方法
CN104160021A (zh) 使用来自木质纤维材料的生化转化方法的固体残留物生产酶混合物的方法

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant