CN109750014B - Fusion type rhizopus chinensis lipase with improved heat stability and application thereof - Google Patents

Fusion type rhizopus chinensis lipase with improved heat stability and application thereof Download PDF

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CN109750014B
CN109750014B CN201910235208.4A CN201910235208A CN109750014B CN 109750014 B CN109750014 B CN 109750014B CN 201910235208 A CN201910235208 A CN 201910235208A CN 109750014 B CN109750014 B CN 109750014B
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黄遵锡
姜占宝
苗华彪
韩楠玉
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Yunnan Normal University
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Abstract

The invention belongs to the technical field of biological engineering, and discloses a fusion type rhizopus chinensis lipase with improved heat stability and application thereof, wherein the amino acid sequence of the fusion type lipase is shown as SEQ ID No.4 or SEQ ID No.5, the fusion type lipase is formed by fusing an amphiphilic short peptide consisting of 30-32 amino acids at the N end in an amino acid sequence of coding rhizopus chinensis lipase, and the amino acid sequence of the amphiphilic short peptide is shown as SEQ ID No.2 or SEQ ID No. 3; the two fusion lipases have ideal heat-resistant property, so the method is particularly suitable for industrial large-scale production.

Description

Fusion type rhizopus chinensis lipase with improved heat stability and application thereof
Technical Field
The invention belongs to the technical field of biological engineering, relates to a fusion type lipase, and particularly relates to a fusion type rhizopus chinensis lipase with improved heat stability and application thereof.
Background
Lipases are capable of gradually hydrolyzing triglycerides into fatty acids, diglycerides, monoglycerides and glycerol; meanwhile, the lipase can also catalyze reactions such as acidolysis, alcoholysis, ammonolysis, transesterification, ester synthesis and the like of ester, is widely applied to processes such as food processing, grease processing, leather processing, biological energy sources, feed addition and the like due to unique catalytic activity, and plays a vital role in development of renewable energy sources and environmental protection. Although a plurality of lipases from rhizopus can be selected in industrial production, most of natural rhizopus lipases are medium-temperature lipases which have low thermal stability and are easy to inactivate at high temperature, and grease processing reaction generally needs to be carried out at higher temperature, so that the industrial production cost is greatly increased due to the defect that the natural rhizopus lipases cannot resist high temperature, and the application of the lipases in industrial production is also limited.
The rhizopus chinensis lipase has poor thermal stability and large loss in industrial production, so the production cost is greatly improved. If the thermal stability of the rhizopus chinensis lipase is improved, the production cost is reduced. Therefore, the rhizopus chinensis lipase gene is transformed into the lipase with relatively high heat resistance by the modification of the rhizopus chinensis lipase gene.
Disclosure of Invention
The invention aims to provide a fusion type lipase and application thereof, and aims to solve the problems of poor heat resistance and undesirable industrial production of rhizopus chinensis lipase.
The invention is realized by the following technical scheme:
a fusion type rhizopus chinensis lipase with improved heat stability is characterized in that a section of amphiphilic short peptide consisting of 30-32 amino acids is fused at the N end of an amino acid sequence of the rhizopus chinensis lipase respectively, wherein the amino acid sequence of the rhizopus chinensis lipase is shown as SEQ ID No. 1.
Specifically, the amphiphilic short peptide is amphiphilic short peptide 1 or amphiphilic short peptide 2, and the fusion type lipase is obtained by fusing a section of amphiphilic short peptide 1 consisting of 30-32 amino acids and amphiphilic short peptide 2 at the N end in the amino acid sequence SEQ ID NO.1 of rhizopus chinensis lipase.
The amino acid sequences of the amphiphilic short peptide 1 and the amphiphilic short peptide 2 are respectively shown as SEQ ID NO.2 and SEQ ID NO. 3.
The amino acid sequence of the fusion type lipase is shown as SEQ ID NO.4 or SEQ ID NO. 5.
The optimal pH value of the enzymatic reaction of the fusion type lipase is 9.0; the optimal temperature is 40 ℃; the lipase fusion amphiphilic short peptide 1 has the advantages that the pH is tolerant for 1 hour and the residual activity is 50% under the conditions of pH4-pH10 and 37 ℃, the pH is tolerant for 1 hour and the residual activity is over 80% under the conditions of pH7-pH10 and 37 ℃, and the residual activity of the lipase fusion amphiphilic short peptide 1 is over 50% after the lipase fusion amphiphilic short peptide 1 is tolerant for 45min at 60 ℃; the lipase fused amphiphilic short peptide 2 has the residual activity of over 50 percent after being endured for 30min at 60 ℃.
In another aspect of the present invention, the amino acid sequence SEQ ID NO.4 or SEQ ID NO.5 is modified, deleted or added with one or more amino acids to obtain an amino acid sequence, and a sequence with only 90% homology is also within the protection scope of the present invention.
The invention also provides a construction method of the fusion type lipase, which comprises the following steps:
1) Designing primers F1 and R1, F2 and R2 to perform template-free PCR so as to obtain an amphiphilic short peptide 1 and an amphiphilic short peptide 2; designing primers F3 and R3, and F3 and R4 to perform PCR amplification on the amphiphilic short peptide 1 and the amphiphilic short peptide 2 respectively;
2) Designing primers F4 and R5, and F5 and R5 to respectively carry out PCR amplification on lipase 1 and lipase 2 by taking a recombinant plasmid obtained by connecting rhizopus chinensis lipase genes to a vector as a template;
3) F3 and R5 are used as primers, and the amphiphilic short peptide 1 and the lipase 1, and the amphiphilic short peptide 2 and the lipase 2 are used as templates respectively for carrying out fusion PCR amplification.
4) Recombining the fusion PCR amplification product with a vector;
5) Putting 5 mu L of recombinant product into 50 mu L of DH5 alpha competent cells, cooling by ice bath, thermally exciting, cooling, adding 500 mu L of LB culture medium, culturing for 1h at 37 ℃ for 180 revolutions, centrifuging, reserving partial clear liquid for suspension precipitation, taking all bacterial liquid to coat a plate, and culturing overnight at 37 ℃;
6) And (3) screening and verifying positive clones, selecting single colonies to be cultured in an LB culture medium with corresponding resistance for 2-3h, carrying out PCR identification, sending out sequencing to the screened positive clones, and comparing the sequencing result with the original sequence.
The nucleotide sequences of the primers F1, R1, F2, R2, F3, R3, F4, R4, F5 and R5 are respectively shown in SEQ ID NO. 8-17.
The expression vector of the coding gene SEQ ID NO.4 and SEQ ID NO.5 is selected from pPIC9K, pPIC, pPICZaA \ B \ C, pPICZA \ B \ C or PGAPZaA \ B \ C.
In another aspect of the present invention, the use of the two fusion lipases in feed additives is also within the scope of the present invention.
The invention has the beneficial effects that:
the fused lipase provided by the invention can construct recombinant plasmids with expression vectors such as pPIC9, pPICZaA \ B \ C, pPICZA \ B \ C, PGAPZaA \ B \ C and the like besides the recombinant plasmids with pPIC9K, and can transform corresponding host bacteria, and through adding antibiotics such as G418, zeocin and the like into a flat plate, lipase gene engineering bacteria are obtained through screening, and then new lipase is obtained through fermentation. The two lipases and wild type lipase are tolerant at high temperature, and experiments prove that the lipase fusion amphiphilic oligopeptide 1 is tolerant at 60 ℃ for 20min and has about 67.98% of enzyme activity, the lipase fusion amphiphilic oligopeptide 2 has about 59.65% of enzyme activity and the wild type lipase only has 50.68% of enzyme activity. The time of half of the relative enzyme activity of the wild-type lipase at 60 ℃ is about 20min, the time of half of the relative enzyme activity of the lipase fusion amphiphilic short peptide 1 is about 45min, and the time of half of the relative enzyme activity of the lipase fusion amphiphilic short peptide 2 is about 30min. The heat resistance of the two lipases is obviously improved, and the loss rate in industrial production is reduced to a certain extent.
Drawings
FIG. 1 is a flow chart of a method for constructing a fused lipase provided in an embodiment of the present invention;
FIG. 2 is a graph showing the determination of the optimum pH according to the example of the present invention;
FIG. 3 is a graph of the optimum temperature profile provided by an embodiment of the present invention;
FIG. 4 is a pH tolerance curve provided by an embodiment of the present invention;
fig. 5 is a 60 ℃ tolerance curve provided by an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Through simulation analysis of the protein space structure of rhizopus chinensis lipase, the amphiphilic short peptide 1 and the amphiphilic short peptide 2 are respectively fused with the rhizopus chinensis lipase. The specific embodiment is that a rhizopus chinensis lipase gene is taken as a template, fusion of the rhizopus chinensis lipase gene and an amphiphilic short peptide is carried out by a gene fusion PCR method to obtain two fusion type lipase genes, the two fusion type lipase genes are connected with vectors such as pPICZaA \ B \ C, pPICZA \ B \ C, PGAPZaA \ B \ C and the like to construct recombinant plasmids, the recombinant plasmids are transferred into corresponding host bacteria (GS 115 or X33, SMD1168 and PICHIAPINK) to carry out heterologous expression, and fermentation can obtain the two lipases. The two lipases can well act in an acid environment, have ideal heat-resistant characteristic and are suitable for high-temperature resistant granulation, so that the lipase is suitable for industrial production.
The amino acid sequence of the lipase fused in the embodiment of the invention is shown in SEQ ID NO.4 or SEQ ID NO. 5.
1. Experimental materials and reagents:
the gene source strain: rhizopus chinensis CCTCC M201021 screened and stored in the laboratory; expression host bacteria and vectors: GS115 and pPIC9K were purchased from Novagen; constructing a lipase recombinant plasmid by a laboratory; host bacteria: DH 5. Alpha. Competent cells were purchased from Tokyo Total gold, inc.
The main reagents are as follows: DNA Marker, protein Marker (TaKaRa corporation); plasmid Mini Kit I (Omega Co.). Agarose was purchased from Tiangen biochemical technologies (beijing) ltd; nucleic acid dyes were purchased from bataxy bio; restriction endonucleases and PCR amplimers were purchased from TaKaRa.
An experimental instrument: centrifuge (Eppendorf); PCR amplificators (Bio-Rad); nucleic acid electrophoresis apparatus (Bio-Rad); protein electrophoresis apparatus (Amersham Bioscience); gel imager (Bio-Rad).
YPD, LB and yeast fermentation media (FA and FB) were prepared according to the method recommended by the Invitrogen operating Manual.
2. Determination of lipase Activity
The amount of enzyme required to hydrolyze the p-NP substrate to form 1. Mu. MoL of p-nitrophenol per minute under certain conditions, i.e., one unit of enzyme activity, is represented by U.
1) An experimental instrument: a constant-temperature water bath kettle; a pH instrument; microplate reader (Bio-Rad), etc.
2) Experimental materials: p-nitrophenol palmitate (p-NPC 16) (Sigma).
3) Solution preparation:
pH buffer solution: 0.1mol/L citric acid monohydrate buffer and 0.1mol/L phosphate buffer (pH 2-7);
0.1mol/L Tris-HCl buffer (pH 7-9);
0.1mol/L glycine-NaOH buffer (pH 9-12).
Substrate solution: 10mmol/L p-nitrophenol palmitate (p-NPC 16).
4) The p-nitrophenol method (p-nitrophenol) was used: the total volume is 500. Mu.L, which contains 420. Mu.L of 50mmol/L buffer, 30. Mu.L of 10mmol/L substrate p-NP, and 50. Mu.L of diluted enzyme solution. Preheating the mixture of substrate and buffer solution at reaction temperature for 2min, adding diluted enzyme solution, mixing, reacting for 5min, adding 50 μ L of 1.0mol/L SDS to terminate the reaction, and adding 500 μ L of 1.0mol/L Na 2 CO 3 Developing color; the OD value was measured at a wavelength of 405 nm.
Example 1 preparation of Lipase fusion amphiphilic short
As shown in fig. 1, the method for obtaining two lipases according to the embodiment of the present invention comprises the following steps:
(1) RCR amplification: designing primers (F1, R1) and (F2, R2) to perform template-free PCR so as to obtain an amphiphilic short peptide 1 and an amphiphilic short peptide 2; designing primers to perform PCR amplification on the amphiphilic short peptide 1 (F3, R3) and the amphiphilic short peptide 2 (F3, R4) respectively; designing primers (F4, R5) (F5, R5) by taking a recombinant plasmid of the rhizopus chinensis lipase gene connected to a vector as a template to perform PCR amplification on a lipase gene 1 and a lipase gene 2;
(2) Respectively carrying out fusion PCR amplification by taking F3 and R5 as primers and using the amphiphilic short peptide 1 and the rhizopus chinensis lipase gene 1, the amphiphilic short peptide 2 and the rhizopus chinensis lipase gene 2 as templates;
(3) Construction of recombinant plasmid: recombining the fusion PCR product with a vector at 37 ℃ for 30min;
(4) And (3) transformation: adding 5 mu L of mutated product into 50 mu L of DH5 alpha competent cell, flicking and mixing evenly, and ice-bathing for 30min; accurately thermally shocking at 42 ℃ for 45s, immediately placing on ice, and cooling for l0min; adding 500 mu L LB culture medium, rotating 180 turns, culturing lh at 37 ℃; centrifuging at 7000rpm for 3min, discarding supernatant, retaining 100-150 μ L supernatant, flicking suspended thallus, collecting all bacteria liquid, plating, and culturing at 37 deg.C overnight;
(5) And (3) verifying positive clones: selecting a single colony in 500 mu L of LB culture medium with corresponding resistance, culturing for 2-3h at 200rpm, and then carrying out PCR identification; sending out sequencing of the screened positive clones, and comparing the sequencing result with the original sequence;
(6) Finding out recombinant plasmids with correct fusion; the mutant plasmid is transferred into pichia pastoris GS115 or X33, SMD1168 and PICHIAPINK for expression, fermentation and enzyme activity comparison are carried out, and the enzymology and application characteristics are researched.
The primers designed in the method are specifically as follows:
Figure GDA0003737475680000081
the amino acid sequences of the amphiphilic short peptide 1 and the amphiphilic short peptide 2 are respectively shown as SEQ ID NO.2 and SEQ ID NO. 3.
Rhizopus chinensis lipase gene fusion parent short peptides 1 and 2 are fused according to the experimental method and sent to Huada gene company for sequencing, the results are shown as sequences SEQ ID NO.4 and SEQ ID NO.5, the transformed yeast strain has lipase activity, and a strain with high unit of the activity of the zymolase is selected respectively for fermentation to obtain enzyme liquid for enzymological property determination.
Example 2 Lipase optimum pH determination
Adjusting the pH of the buffer solution to 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12, diluting the enzyme solution to an adaptation multiple, measuring the optimum pH at 37 ℃ according to a lipase activity measuring method, and then continuously detecting the optimum value at half-filling points on both sides of the maximum value (for example, when the optimum pH is 9, measuring the pH at 8, 8.5, 9, 9.5 and 10 according to the lipase activity measuring method).
The optimum pH results of the lipase enzymatic reaction are shown in FIG. 2. The lipase fusion amphiphilic short peptides 1 and 2 and wild lipase are most suitable 9, and no obvious change exists.
Example 3 measurement of optimum temperature of Lipase
According to the determination method of lipase activity, under the condition of the above-mentioned optimum pH, the reactant is placed at different temperatures and reacted at 0 deg.C, 10 deg.C, 20 deg.C, 30 deg.C, 40 deg.C, 50 deg.C, 60 deg.C, 70 deg.C, 80 deg.C, after the optimum temperature is determined, half-point is supplemented on both sides of the maximum value (for example, if the optimum temperature is 40 deg.C, 30 deg.C, 35 deg.C, 40 deg.C, 45 deg.C, 50 deg.C are determined according to the determination method of lipase activity).
The optimum temperature values of the lipase enzymatic reactions are shown in FIG. 3, and the optimum temperatures of the lipase gene fusion amphiphilic short peptides 1 and 2 and the wild-type lipase are 40 ℃.
Example 4 Lipase pH tolerance assay
The buffers were adjusted to different pH: 2. 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, diluting the enzyme solution with these different buffers, timing from when the enzyme solution is put in, putting the diluted enzyme solution in a water bath kettle at 37 ℃ for 1 hour, putting on ice, and immediately performing the reaction at the optimum pH and the optimum temperature according to the lipase activity measuring method. The enzyme solution of the control group was an enzyme solution that was not tolerated.
As can be seen from FIG. 4, the tendency of the tolerance curve of the three lipases is the same, and the relative enzyme activity is obviously increased after the lipases are tolerated for 1 hour at 37 ℃ between pH4 and pH 9.
Example 5 Lipase temperature tolerance assay
Diluting the enzyme solution to corresponding times, and then putting the enzyme solution into a reaction kettle at different temperatures: tolerance is carried out at 60 ℃ for 1min, 3min, 5min, 7min, 10min, 15min, 20min, 25min, 30min, 35min, 45min and 60min, and then reaction is carried out at the optimum PH and the optimum temperature according to a lipase activity determination method. The control group enzyme solution was an enzyme solution that was not temperature-tolerant.
The temperature tolerance of the lipase at high temperature is shown in fig. 5, and the relative enzyme activity is continuously reduced along with the increase of temperature, and is gradually reduced along with the increase of time. The relative enzyme activity after fusion is higher than that before mutation at any temperature and time, the relative enzyme activity of the fusion type lipase 1 tolerating 20min at 60 ℃ is about 67.98%, the relative enzyme activity of the fusion type lipase 2 is about 59.65%, and the relative enzyme activity of the wild type lipase is only 50.68%. The time of half of the wild-type lipase remaining relative to the enzyme activity at 60 ℃ is about 20min, the time of half of the fused lipase 1 remaining relative to the enzyme activity is about 45min, and the time of half of the fused lipase 2 remaining relative to the enzyme activity is about 30min.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Sequence listing
<110> university of Yunnan Master
<120> fusion type rhizopus chinensis lipase with improved heat stability and application thereof
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Val Pro Val Ala Gly His Lys Gly Ser Val Lys Ala Thr Asn Gly Thr
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Asp Phe Gln Leu Pro Pro Leu Ile Ser Ser Arg Cys Thr Pro Pro Ser
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His Pro Glu Thr Thr Gly Asp Pro Asp Ala Glu Ala Tyr Tyr Ile Asn
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Asn Tyr Ala Gly Val Ala Ala Thr Ala Tyr Cys Arg Ser Val Val Pro
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Gly Thr Lys Trp Asp Cys Lys Gln Cys Leu Lys Tyr Val Pro Asp Gly
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Lys Leu Ile Lys Thr Phe Thr Ser Leu Leu Thr Asp Thr Asn Gly Phe
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Ile Leu Arg Ser Asp Ala Gln Lys Thr Ile Tyr Val Thr Phe Arg Gly
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Thr Asn Ser Phe Arg Ser Ala Ile Thr Asp Met Val Phe Thr Phe Thr
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Asp Tyr Ser Pro Val Lys Gly Ala Lys Val His Ala Gly Phe Leu Ser
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Ser Tyr Asn Gln Val Val Lys Asp Tyr Phe Pro Val Val Gln Asp Gln
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Leu Thr Ala Tyr Pro Asp Tyr Lys Val Ile Val Thr Gly His Ser Leu
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Lys Arg Leu Ser Pro Lys Asn Leu Ser Ile Tyr Cys Val Gly Cys Pro
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Arg Val Gly Asn Asn Ala Phe Ala Tyr Tyr Val Asp Ser Thr Gly Ile
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Gly Thr Lys Trp Asp Cys Lys Gln Cys Leu Lys Tyr Val Pro Asp Gly
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Asp Tyr Ser Pro Val Lys Gly Ala Lys Val His Ala Gly Phe Leu Ser
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Ser Tyr Asn Gln Val Val Lys Asp Tyr Phe Pro Val Val Gln Asp Gln
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Arg Val Gly Asn Asn Ala Phe Ala Tyr Tyr Val Asp Ser Thr Gly Ile
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Pro Phe His Arg Thr Val His Lys Arg Asp Ile Val Pro His Val Pro
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Pro Pro Pro Ile Pro Ala Thr Ser Thr Ala Pro Ser Ser Asp Ser Gly
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Glu Val Val Thr Ala Thr Ala Ala Gln Ile Lys Glu Leu Thr Asn Tyr
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Ala Gly Val Ala Ala Thr Ala Tyr Cys Arg Ser Val Val Pro Gly Thr
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Lys Trp Asp Cys Lys Gln Cys Leu Lys Tyr Val Pro Asp Gly Lys Leu
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Ile Lys Thr Phe Thr Ser Leu Leu Thr Asp Thr Asn Gly Phe Ile Leu
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Arg Ser Asp Ala Gln Lys Thr Ile Tyr Val Thr Phe Arg Gly Thr Asn
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Ser Phe Arg Ser Ala Ile Thr Asp Met Val Phe Thr Phe Thr Asp Tyr
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Ser Pro Val Lys Gly Ala Lys Val His Ala Gly Phe Leu Ser Ser Tyr
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Asn Gln Val Val Lys Asp Tyr Phe Pro Val Val Gln Asp Gln Leu Thr
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Ala Tyr Pro Asp Tyr Lys Val Ile Val Thr Gly His Ser Leu Gly Gly
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Ala Gln Ala Leu Leu Ala Gly Met Asp Leu Tyr Gln Arg Glu Lys Arg
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Leu Ser Pro Lys Asn Leu Ser Ile Tyr Cys Val Gly Cys Pro Arg Val
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Gly Asn Asn Ala Phe Ala Tyr Tyr Val Asp Ser Thr Gly Ile Pro Phe
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His Arg Thr Val His Lys Arg Asp Ile Val Pro His Val Pro Pro Gln
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Ala Phe Gly Tyr Leu His Pro Gly Val Glu Ser Trp Ile Lys Glu Asp
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Pro Ala Asp Val Gln Ile Cys Thr Ser Asn Ile Glu Thr Lys Gln Cys
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Ser Asn Ser Ile Val Pro Phe Thr Ser Ile Ala Asp His Leu Thr Tyr
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cctgactata aggtcatcgt caccggtcac tctctcggtg gtgcccaagc cttgctcgct 840
ggtatggatc tctaccaaag agaaaagaga ttatctccta agaacttgag catctatact 900
gttggttgtc ctagagtcgg taacaatgca ttcgcttact acgtcgacag caccggaatt 960
cctttccaca gaaccgttca caagagagat atcgtccctc atgttcctcc tcaagccttc 1020
ggttatcttc accctggtgt cgaatcttgg atcaaggaag accctgctga tgttcaaatc 1080
tgtacttcca acattgaaac caaacaatgc agtaactcta tcgttccttt cacctctatc 1140
gctgatcact taacctactt tggtattaac gaaggaagct gtttg 1185
<210> 7
<211> 1167
<212> DNA
<213> Coding gene
<400> 7
gctgaagctg aagctaaagc taaagctgaa gctgaaccga aagtcagccc ggaggctgtt 60
aagaaggagg ctgagctcgt tcctgttgct ggtcataaag gttcagtcaa ggcaactaat 120
ggtactgact tccaactccc tcctctcatc tctagcagat gtactcctcc ttcccatcct 180
gaaaccacag gtgatcctga tgccgaagct tactatatta acaagagcgt tcaatggtac 240
caagctcacg gtggtaacta cactgctctt atcaagagag atactgaaac cgtcggtggt 300
atgaccttgg atttgcctga gaaccctcct cctattcctg ccacgtccac tgctcctagc 360
tctgattcag gtgaagttgt cacagccact gctgctcaaa tcaaagagct cactaactac 420
gctggtgttg ctgctactgc ttactgtaga agtgtcgttc caggtaccaa gtgggactgt 480
aagcaatgtc tcaagtatgt tcctgatggt aagcttatca agaccttcac ttctcttctc 540
actgatacca atggttttat cttgagaagt gatgctcaaa agaccatcta tgttactttc 600
agaggtacta attccttcag aagcgctatt actgacatgg tcttcacctt tactgattat 660
tctcctgtca agggtgccaa agttcacgct ggtttccttt cctcatacaa ccaagttgtc 720
aaagactact tccctgtcgt tcaagaccaa ttgaccgctt accctgacta taaggtcatc 780
gtcaccggtc actctctcgg tggtgcccaa gccttgctcg ctggtatgga tctctaccaa 840
agagaaaaga gattatctcc taagaacttg agcatctata ctgttggttg tcctagagtc 900
ggtaacaatg cattcgctta ctacgtcgac agcaccggaa ttcctttcca cagaaccgtt 960
cacaagagag atatcgtccc tcatgttcct cctcaagcct tcggttatct tcaccctggt 1020
gtcgaatctt ggatcaagga agaccctgct gatgttcaaa tctgtacttc caacattgaa 1080
accaaacaat gcagtaactc tatcgttcct ttcacctcta tcgctgatca cttaacctac 1140
tttggtatta acgaaggaag ctgtttg 1167
<210> 8
<211> 59
<212> DNA
<213> Artificial Sequence
<400> 8
gctgaagctg aagctaaagc taaagctgaa gctgaagcta aagctaaacc aactccacc 59
<210> 9
<211> 59
<212> DNA
<213> Artificial Sequence
<400> 9
agttggagtt ggagtagttg gtggagttgg agtagttggt ggagttggtt tagctttag 59
<210> 10
<211> 59
<212> DNA
<213> Artificial Sequence
<400> 10
gctgaagctg aagctaaagc taaagctgaa gctgaaccga aagtcagccc ggaggctgt 59
<210> 11
<211> 59
<212> DNA
<213> Artificial Sequence
<400> 11
gagctcagcc tccttcttaa cagcctccgg gctgactttc ggttcagctt cagctttag 59
<210> 12
<211> 44
<212> DNA
<213> Artificial Sequence
<400> 12
gaggctgaag cttacgtaga attcgctgaa gctgaagcta aagc 44
<210> 13
<211> 30
<212> DNA
<213> Artificial Sequence
<400> 13
accagcaaca ggaacagttg gagttggagt 30
<210> 14
<211> 30
<212> DNA
<213> Artificial Sequence
<400> 14
accagcaaca ggaacgagct cagcctcctt 30
<210> 15
<211> 30
<212> DNA
<213> Artificial Sequence
<400> 15
actccaactc caactgttcc tcttgctggt 30
<210> 16
<211> 30
<212> DNA
<213> Artificial Sequence
<400> 16
gttcctgttg ctggtcataa aggttcagtc 30
<210> 17
<211> 44
<212> DNA
<213> Artificial Sequence
<400> 17
tctaaggcga attaattcgc ggccgcctac aaacagcttc cttc 44

Claims (2)

1. Fusion type rhizopus chinensis (with improved heat stability)Rhizopus chinensis ) The lipase is characterized in that the amino acid sequence of the fusion type rhizopus chinensis lipase is shown as SEQ ID NO. 5.
2. Use of the fused Rhizopus chinensis lipase of claim 1 in feed additives.
CN201910235208.4A 2019-03-27 2019-03-27 Fusion type rhizopus chinensis lipase with improved heat stability and application thereof Active CN109750014B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109776686A (en) * 2019-03-27 2019-05-21 云南师范大学 A kind of pattern of fusion lipase and its preparation method and application that thermostability improves

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JP3615512B2 (en) * 2001-11-12 2005-02-02 日華化学株式会社 Lipase activity activator, skin external preparation containing the lipase activity activator, skin external preparation for slimming, and bath preparation for slimming
CA2822271A1 (en) * 2010-12-20 2012-06-28 E. I. Du Pont De Nemours And Company An aqueous stable composition for delivering substrates for a depilatory product using peracetic acid
CN105316310B (en) * 2015-11-25 2019-03-01 江南大学 A kind of alkaline pectin enzyme mutant of specific enzyme activity and thermal stability raising
CN106520733B (en) * 2016-10-19 2020-09-22 华南理工大学 Beta-xylosidase enzyme aggregate and preparation method thereof
CN106754848B (en) * 2016-12-27 2020-11-03 江南大学 Alkaline pectinase mutant with improved thermal stability
CN110295159A (en) * 2018-03-07 2019-10-01 江南大学 A kind of enzyme mutant
CN109161538B (en) * 2018-09-29 2021-10-15 云南师范大学 Lipase mutant with improved heat stability and application thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109776686A (en) * 2019-03-27 2019-05-21 云南师范大学 A kind of pattern of fusion lipase and its preparation method and application that thermostability improves

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