CN104480089B - The zytase of mutation and its application in L lysine products - Google Patents

The zytase of mutation and its application in L lysine products Download PDF

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CN104480089B
CN104480089B CN201410777733.6A CN201410777733A CN104480089B CN 104480089 B CN104480089 B CN 104480089B CN 201410777733 A CN201410777733 A CN 201410777733A CN 104480089 B CN104480089 B CN 104480089B
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zytase
acquisition
coating
product containing
present
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CN104480089A (en
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孟刚
马吉银
陈崇安
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NINGXIA EPPEN BIOTECH CO Ltd
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NINGXIA EPPEN BIOTECH CO Ltd
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    • 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

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Abstract

The invention provides the zytase of mutation, it includes mutation Arg45Ser.Other application present invention also offers it in the product for preparing the lysine containing L etc..

Description

The zytase of mutation and its application in 1B product
Technical field
The invention belongs to enzyme field, specifically, contain L- the present invention relates to the zytase of new mutation and its preparing Application in the product of lysine etc..
Background technology
1B is important amino acid starting material, can be used as flavouring, food, feed addictive, can also As the effective or adjunct ingredient in health products, medicine, it is widely used in grocery trade, feed industry, pharmacy industry and other chemical works In industry.Currently, the production of 1B mainly passes through the fermenting and producing of microorganism, can such as utilize corynebacteria production.
However, when lysine is as feed, because it belongs to small molecule nutriment, will soon be discharged into dynamic In object, especially in huge uptake, the efficiency that animal absorbs have impact on.The method generally solved is to feed in multiple times on a small quantity Animal is eaten, but this will increase the workload of animal feeding.Therefore, the present invention, which is proposed, directly uses fermenting lysine nutrient solution system The method of standby coated lysine product, can effectively slow down the speed that lysine discharges in animal body.
The preceding Chinese patent 201210440083 of the present inventor describes a kind of product of coated lysine, main to use In feed.On this basis, present inventor has performed in-depth study, unexpectedly in many aspects, including process aspect, Composition(Including trace mineral supplement)In terms of aspect and enzyme transformation etc., obtain what can be improved coating and/or increase operation rate The product of lysine.
Invention summary
The technical problem to be solved in the present invention is to provide the zytase of new mutation and its contain 1B preparing Product in application.In addition, the present invention can also provide each branch invention obtained from product optimization, including rely containing L- The feed addictive and product of propylhomoserin, and/or, the application of sodium glutamate in the preparation of the product containing 1B etc..
Preferably, in one aspect of the invention, the invention provides the zytase of mutation, it includes mutation Arg45Ser。
It is preferred that the amino acid sequence of the zytase
(1)Such as SEQ ID No:Shown in 2;Or
(2)It is to SEQ ID No:2 lack, add and/or replace one or several(Preferably more than 7, more preferably not More than 5,3 are such as no more than)Amino acid residue and the reservation SEQ ID No obtained:The sequence of 2 activity, and wherein include It is mutated Arg45Ser.
On the other hand, the invention provides the gene for encoding foregoing zytase.
It is preferred that the nucleotide sequence of the gene such as SEQ ID No:Shown in 1.
On the other hand, the invention provides the carrier for including foregoing aspects of gene.
On the other hand, the invention provides strain(Especially secreting, expressing bacterium(Such as, yeast)), it includes foregoing aspect Gene, or with foregoing aspects of carrier convert or transfect and obtain.
On the other hand, the invention provides the method for the foregoing aspects of zytase of fermenting and producing, it is included in fermentation Under the conditions of cultivate foregoing aspects of strain, foregoing aspects of zytase is isolated from culture.
On the other hand, the product containing 1B is being prepared the invention provides foregoing aspects of zytase(Such as, raise Feed additives)In purposes.
Preferably wherein, the coated layer that the product containing 1B includes coating slug particle and is wrapped on coating slug particle, Wherein coated layer is rumen-undegraded fat, and coating slug particle includes foregoing aspects of zytase, lysine salt, filler and bonding Agent and optional sodium glutamate.
Preferably wherein, the xylanase activity in every gram of product containing 1B described in claim 1 or 2 be 5 ~ 15IU, more preferably 8 ~ 10IU, most preferably 9IU.
Preferably wherein, the method for preparation includes:
(1)Lysine salt and filler and optional sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The binder solution containing zytase is added in the mixture of acquisition, is well mixed, is formed Softwood;
(3)By step(2)The softwood sieving of acquisition(Such as, 30 mesh sieve), form coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle;With,
(6)Optionally, rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
Detailed description of the invention
The technical problem to be solved in the present invention is to provide the zytase of new new mutation and its rely preparing containing L- Application in the product of propylhomoserin.In addition, the present invention can also provide the preparation method of the feed addictive and the technique of optimization Application in the feed addictive containing 1B is prepared, the product containing 1B, and/or, a small amount of sodium glutamate exists The branches such as the application in the feed addictive containing 1B are prepared to invent.
One, term is explained
Herein, term has the implication that those skilled in the art routinely understands.For the sake of clarity, herein Following term is illustrated.
Herein, term is " optional " has its dictionary justice, i.e., the object being accordingly defined is chosen or do not selected.Example Such as, sodium glutamate is referred to containing or not contained containing optional sodium glutamate.And for example, optionally referred to containing zytase Contain or do not contain zytase.
Herein, term " filler " and " adhesive " refer respectively to each serve as non-human animal's edible safety Filling and the assistant agent of adhesive effect, it is preferable that " filler " and " adhesive " herein is food grade(That is people's edible safety 's), it is referred to corresponding(People uses)The index of food.
Herein, term "comprising" or " comprising " are open statements, i.e., except list contain or comprise into Outside part, can no longer contain other compositions or step, but be also not excluded for not influenceing containing other also the composition specifically listed or Step plays the other compositions or step of function.Preferably, "comprising" herein or " comprising " are preferably " Consists of ".
Herein, as do not indicated plus especially, term " lysine " refers to 1B.
Two, the product containing 1B
The second of the present invention(1)Aspect, the invention provides the feed addictive containing 1B, it includes being coated with core Particle and the coated layer being wrapped on coating slug particle, wherein coated layer is rumen-undegraded fat, is coated with the preparation method of slug particle Including:
(1)Lysine salt and filler and optional sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The optionally binder solution containing zytase is added in the mixture of acquisition, is well mixed, Form softwood;
(3)By step(2)The softwood sieving of acquisition, forms coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;With
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle.
Preferably wherein, step(1)In filler be microcrystalline cellulose and/or dextrin.
Preferably wherein, step(2)In adhesive be carboxymethyl cellulose.
Preferably wherein, step(2)In xylanase amino acid sequence such as SEQ ID NO:Shown in 2.
Preferably wherein, the weight ratio of lysine salt, filler, sodium glutamate and adhesive is 40 ~ 55:4~6:0~2:0.3~ 0.8, preferably 42 ~ 50:4.5~5.5:0~1.5(Such as 0.5 ~ 1.5):0.4 ~ 0.5, more preferably 43 ~ 48:4.8~5.2:0~1.2 (Such as 0.8 ~ 1.2):0.45 ~ 0.55, most preferably 45 ~ 46:5:0~1:0.5.
Preferably wherein, coating slug particle and the weight ratio of coated layer are 40 ~ 60:40 ~ 60, preferably 46 ~ 56:43 ~ 53, more Preferably 48.5 ~ 51.5:48.5 ~ 51.5, most preferably 1:1.
Preferably wherein, xylanase activity is 0 ~ 30IU, preferably 0 ~ 15IU in every gram of feed addictive(Such as 5 ~ 15IU), More preferably 0 ~ 10IU(Such as 8 ~ 10IU), most preferably 0 ~ 9IU.
Preferably wherein, step(2)In sieve be 30 mesh sieves.
Preferably wherein, step(5)In screening be separation obtain can by 30 mesh sieves and by 40 mesh sieves retain particle.
The second of the present invention(2)Aspect, the invention provides the second of the present invention(1)The system of the feed addictive of aspect Preparation Method, it includes the step being sprayed on rumen-undegraded fat on coating slug particle.
It is preferred that it includes:
(1)Lysine salt and filler and optional sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The optionally binder solution containing zytase is added in the mixture of acquisition, is well mixed, Form softwood;
(3)By step(2)The softwood sieving of acquisition, forms coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle;With
(6)Rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
The second of the present invention(3)Aspect, the invention provides the product containing 1B, it include coating slug particle and The coated layer on coating slug particle is wrapped in, wherein coated layer is rumen-undegraded fat, coating slug particle includes lysine salt, filling Agent and adhesive and optional sodium glutamate and optional zytase.
Preferably wherein, product is feed addictive.
Preferably wherein, lysine salt is lysine hydrochloride, lysine sulphate or their mixture, is preferably relied Propylhomoserin sulfate.
Preferably wherein, filler is microcrystalline cellulose and/or dextrin.
Preferably wherein, adhesive is carboxymethyl cellulose.
Preferably wherein, xylanase amino acid sequence such as SEQ ID NO:Shown in 2.
Preferably wherein, the weight ratio of lysine salt, filler, sodium glutamate and adhesive is 40 ~ 55:4~6:0~2:0.3~ 0.8, preferably 42 ~ 50:4.5~5.5:0~1.5(Such as 0.5 ~ 1.5):0.4 ~ 0.5, more preferably 43 ~ 48:4.8~5.2:0~1.2 (Such as 0.8 ~ 1.2):0.45 ~ 0.55, most preferably 45 ~ 46:5:0~1:0.5.
Preferably wherein, coating slug particle and the weight ratio of coated layer are 40 ~ 60:40 ~ 60, preferably 46 ~ 56:43 ~ 53, more Preferably 48.5 ~ 51.5:48.5 ~ 51.5, most preferably 1:1.
Preferably wherein, often xylanase activity is 0 ~ 30IU, preferably 0 ~ 15IU in restraint product(Such as 5 ~ 15IU), more preferably For 0 ~ 10IU(Such as 8 ~ 10IU), most preferably 0 ~ 9IU.
Preferably wherein, coating slug particle is the particle that can be retained by 30 mesh sieves and by 40 mesh sieves.
Preferably wherein, fat is preferably palm fat and/or lecithin, the production that can be more preferably obtained by commercial sources Product, such as hundred Canons, Pepsi U.S., preferably hundred Canon HTL316, Pepsi U.S. T300 etc..In the embodiment of the present invention In, coating fat used is Pepsi U.S. T300.
Such as the instruction without opposite or contradiction, aspects above can preferably present aspect or other each side herein Content.
Three, the technique for preparing the product containing 1B
The 3rd of the present invention the(1)Aspect, the invention provides the preparation method of the product containing 1B, it includes:
(1)Lysine salt and filler and optional sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The optionally binder solution containing zytase is added in the mixture of acquisition, is well mixed, Form softwood;
(3)By step(2)The softwood sieving of acquisition(Such as, 30 mesh sieve), form coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle grain;With,
(6)Rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
It is preferred that the product containing 1B prepared by the preparation method is the second of the present invention(3)Product described in aspect.
It is preferred that the preparation method is made up of following steps:
(1)Lysine salt and filler and optional sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The optionally binder solution containing zytase is added in the mixture of acquisition, is well mixed, Form softwood;
(3)By step(2)The softwood sieving of acquisition(Such as, 30 mesh sieve), form coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle;With,
(6)Rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
The inventors discovered that, the step of to coarse granule ball blast to form circular micropill and/or dry circular micropill and carry out Screening, can effectively improve the anti-degradation capability of the coated product containing 1B of rumen-undegraded fat.So ensuing Aspect, the invention provides the 3rd of the present invention(1)Step in aspect(4)And/or step(5)Application.Throw preferably wherein Ball is carried out in shot-blasting machine;And/or, screening is separated with the screen cloth of one or more special pore size distributions.
The 3rd of the present invention the(2)Aspect, the step of the invention provides to coarse granule ball blast to form circular micropill Prepare the application in the method for the coated product containing 1B of rumen-undegraded fat.
The 3rd of the present invention the(3)Aspect, the invention provides dry circular micropill and sieved preparing rumen bypass Application in the method for the coated product containing 1B of fat.
The 3rd of the present invention the(4)Aspect, the step of the invention provides to coarse granule ball blast to form circular micropill Improve the application in the anti-degradation capability of the coated product containing 1B of rumen-undegraded fat.
The 3rd of the present invention the(5)Aspect, is being improved the invention provides dry circular micropill and the step of screening Application in the anti-degradation capability of the coated product containing 1B of rumen-undegraded fat.
Preferably wherein, the step of to coarse granule ball blast to form circular micropill, is in(It is preferred that being next to)Formed coarse granule it Afterwards.
Preferably wherein, dry circular micropill and be in the step of screening(It is preferred that being next to)Rumen-undegraded fat is sprayed on Before being coated with slug particle.
Preferably wherein, the coated product containing 1B of rumen-undegraded fat is the second of the present invention(3)Described in aspect Product.
Preferably wherein, the method for preparing the coated product containing 1B of rumen-undegraded fat is the 3 of the present invention(1) Method described in aspect.
Preferably wherein, screening is that separation obtains the particle that can be retained by 30 mesh sieves and by 40 mesh sieves.
Such as the instruction without opposite or contradiction, aspects above can preferably present aspect or other each side herein Content.
Four, application of the sodium glutamate in the product containing 1B
The inventors discovered that, a small amount of sodium glutamate is beneficial to the anti-degradation capability of the product containing 1B, and Lysine is not influenceed to play the effect of feed.So, present invention also offers sodium glutamate in the product containing 1B Using and correlation method.
The 4th of the present invention the(1)Aspect, the invention provides the preparation method of the product containing 1B, it includes:
(1)Lysine salt and filler and sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The optionally binder solution containing zytase is added in the mixture of acquisition, is well mixed, Form softwood;
(3)By step(2)The softwood sieving of acquisition(Such as, 30 mesh sieve), form coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle;With,
(6)Rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
Preferably wherein, product is feed addictive.
Preferably wherein, step(1)In filler be microcrystalline cellulose and/or dextrin.
Preferably wherein, step(2)In adhesive be carboxymethyl cellulose.
Preferably wherein, step(2)In xylanase amino acid sequence such as SEQ ID NO:Shown in 2.
Preferably wherein, the weight ratio of lysine salt, filler, sodium glutamate and adhesive is 42 ~ 50:4.5~5.5:0.5~ 1.5:0.4 ~ 0.5, more preferably 43 ~ 48:4.8~5.2:0.8~1.2:0.45 ~ 0.55, most preferably 45 ~ 46:5:1:0.5.
Preferably wherein, coating slug particle and the weight ratio of coated layer are 40 ~ 60:40 ~ 60, preferably 46 ~ 56:43 ~ 53, more Preferably 48.5 ~ 51.5:48.5 ~ 51.5, most preferably 1:1.
Preferably wherein, xylanase activity is 0 ~ 30IU, preferably 0 ~ 15IU in every gram of feed addictive(Such as 5 ~ 15IU), More preferably 0 ~ 10IU(Such as 8 ~ 10IU), most preferably 0 ~ 9IU.
Preferably wherein, xylanase activity is 0 ~ 30IU, preferably 0 ~ 15IU in every gram of feed addictive(Such as 5 ~ 15IU), More preferably 0 ~ 10IU(Such as 8 ~ 10IU), most preferably 0 ~ 9IU.
Preferably wherein, step(5)In screening be separation obtain can by 30 mesh sieves and by 40 mesh sieves retain particle.
The 4th of the present invention the(2)Aspect, the invention provides the 4th of the present invention(1)Prepared by the method described in aspect Product.
The 4th of the present invention the(3)Aspect, the invention provides sodium glutamate prepare rumen-undegraded fat it is coated contain L- In the method for the product of lysine or in the anti-degradation capability for improving the coated product containing 1B of rumen-undegraded fat Application.That is, the invention provides sodium glutamate in the method for preparing the coated product containing 1B of rumen-undegraded fat Application, present invention also offers sodium glutamate improve the coated product containing 1B of rumen-undegraded fat anti-degraded energy Application in power.
Preferably wherein, sodium glutamate is seldom, and the weight of such as sodium glutamate accounts for that rumen-undegraded fat is coated to be relied containing L- The 0.5 ~ 1.5% of the product of propylhomoserin, preferably 0.8 ~ 1.2%, most preferably 1%.
Preferably wherein, the coated product containing 1B of rumen-undegraded fat is the 4th of the present invention(2)Described in aspect Product.
Preferably wherein, the method for preparing the coated product containing 1B of rumen-undegraded fat is the 4 of the present invention(1) Method described in aspect.
Such as the instruction without opposite or contradiction, aspects above can preferably present aspect or other each side herein Content.
Five, the zytase of mutation and its application
The present inventor's surprisingly xylanase mutant, it is keeping the base of original high-temperature stability substantially Enzymatic activity is added significantly on plinth, is particularly useful for being added into the feed addictive containing 1B.
The 5th of the present invention the(1)Aspect, the invention provides the zytase of mutation, it includes mutation Arg45Ser, I.e. the 45th amino acids residue sports Ser by Arg.
It is preferred that the amino acid sequence of the zytase of the mutation
(1)Such as SEQ ID No:Shown in 2;Or
(2)It is to SEQ ID No:2 lack, add and/or replace one or several(Preferably more than 7, more preferably not More than 5,3 are such as no more than)Amino acid residue and the reservation SEQ ID No obtained:The sequence of 2 activity, and wherein include It is mutated Arg45Ser.
The 5th of the present invention the(2)Aspect, the invention provides the 5th of the coding present invention(1)Xylan described in aspect The gene of enzyme.
It is preferred that the nucleotide sequence of the gene such as SEQ ID No:Shown in 1.
The 5th of the present invention the(3)Aspect, the invention provides include the 5th of the present invention(2)Gene described in aspect Carrier.
The 5th of the present invention the(4)Aspect, the invention provides strain, it includes the 5th of the present invention(2)Described in aspect Gene, or with the present invention the 5th(3)Carrier described in aspect converts or transfects and obtain.
It is preferred that the strain is secreting, expressing bacterium, and e.g., yeast.
The 5th of the present invention the(5)Aspect, the invention provides the 5th of the fermenting and producing present invention(1)Wood described in aspect The method of dextranase, it includes cultivating the 5th of the present invention under fermentation conditions(4)Strain described in aspect, divides from culture Separate out the 5th of the present invention(1)Zytase described in aspect.
The 5th of the present invention the(6)Aspect, the invention provides the 5th of the present invention(1)Zytase described in aspect exists Prepare the purposes in the product containing 1B.
Preferably wherein, the of the invention 5th in every gram of product containing 1B(1)Xylanase activity described in aspect For 5 ~ 15IU, most preferably more preferably 8 ~ 10IU, 9IU.
Preferably wherein, product is feed addictive.
Preferably wherein, the coated layer that the product containing 1B includes coating slug particle and is wrapped on coating slug particle, Wherein coated layer is rumen-undegraded fat, and coating slug particle includes the 5th of the present invention(1)Zytase, lysine described in aspect Salt, filler and adhesive and optional sodium glutamate.
More preferably wherein, lysine salt is lysine hydrochloride, lysine sulphate or their mixture, is preferably Lysine sulphate.
More preferably wherein, filler is microcrystalline cellulose and/or dextrin.
More preferably wherein, adhesive is carboxymethyl cellulose.
More preferably wherein, xylanase amino acid sequence such as SEQ ID NO:Shown in 2.
Preferably wherein, the weight ratio of lysine salt, filler, sodium glutamate and adhesive is 40 ~ 55:4~6:0~2:0.3~ 0.8, preferably 42 ~ 50:4.5~5.5:0~1.5(Such as 0.5 ~ 1.5):0.4 ~ 0.5, more preferably 43 ~ 48:4.8~5.2:0~1.2 (Such as 0.8 ~ 1.2):0.45 ~ 0.55, most preferably 45 ~ 46:5:0~1:0.5.
Preferably wherein, coating slug particle and the weight ratio of coated layer are 40 ~ 60:40 ~ 60, preferably 46 ~ 56:43 ~ 53, more Preferably 48.5 ~ 51.5:48.5 ~ 51.5, most preferably 1:1.
Preferably wherein, coating slug particle is the particle that can be retained by 30 mesh sieves and by 40 mesh sieves.
Preferably wherein, fat is preferably palm fat and/or lecithin, the production that can be more preferably obtained by commercial sources Product, such as hundred Canons, Pepsi U.S., preferably hundred Canon HTL316, Pepsi U.S. T300 etc..In the embodiment of the present invention In, coating fat used is Pepsi U.S. T300.
Preferably wherein, the method for preparation includes:
(1)Lysine salt and filler and optional sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The binder solution containing zytase is added in the mixture of acquisition, is well mixed, is formed Softwood;
(3)By step(2)The softwood sieving of acquisition(Such as, 30 mesh sieve), form coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle;With,
(6)Optionally, rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
Such as the instruction without opposite or contradiction, aspects above can preferably present aspect or other each side herein Content.
The invention has the advantages that:By the improvement of many aspects, product safety of the invention is reliable, relative to Prior art, can more effectively reduce the rate of release of lysine in animal body, and anti-degradation capability is stronger, more improve the profit of feed Promote growing for animal with rate.
In order to make it easy to understand, the present invention will be described in detail by specific embodiment below.Need to refer in particular to Go out, the description that these descriptions are merely exemplary, and be not meant to limit the scope of the invention.Opinion according to this specification State, many changes of the invention, change and will be apparent from for one of ordinary skill in the art.
In addition, the present invention refer to open source literature, these documents are their full text in order to more clearly describe the present invention Content is included and referred to herein, just looks like that their full text is repeated and was expressly recited the same herein.
Embodiment
Present disclosure is further illustrated by the following examples.As do not specialized, technology used in embodiment Conventional meanses that means are well known to those skilled in the art and commercially available common instrument, reagent, reference can be made to《Molecular Cloning: A Laboratory Guide(3rd edition)》(Science Press)、《Microbiology Experiment(4th edition)》(Higher Education Publishing House)And corresponding instrument and Manufacturers instruction of reagent etc. is referred to.
The preparation of the expression construct of the xylanase gene of the saltant type of embodiment 1
According to us in the xylanase gene of preceding No. 201210185883 records of Chinese Patent No., the 45th will be encoded thereon The Arg of position is mutated into Ser, i.e., the CGC of nucleotide sequence 133-135 is mutated into TCC, the core of the zytase of saltant type The SEQ ID No of nucleotide sequence such as sequence table:Shown in 1, the amino acid sequence such as SEQ ID No of coded zytase:2 institutes Show.Then, according to《Molecular Cloning:A Laboratory guide》And the operating guidance of commercial reagents used builds the yeast of secreting, expressing, In brief, the gene SEQ ID No of forward primer such as sequence table of the zytase will be encoded:Shown in 3(Introduce EcoR I restriction enzyme sites), reverse primer such as sequence table SEQ ID No:Shown in 4(Introduce Not I restriction enzyme sites)Expand After increasing use EcoR I and Not I double digestions, and with the pPIC3.5 plasmids through the two endonuclease digestions(It is purchased from Invitrogen companies)It is attached, is transformed into bacillus coli DH 5 alpha with T4 DNA ligases.Choose positive colony, extract Go out plasmid therein, through sequence verification it is correct after, by positive plasmid with after Sal I linearization for enzyme restriction, converted by electrotransformation Enter GS115 plants of pichia yeast, positive yeast transformant is chosen on the flat board containing G418, is returned.
The fermentation preparation and determination of activity of the zytase of the saltant type of embodiment 2
The positive yeast transformant that embodiment 1 is obtained is inoculated into 50ml BMGY fluid nutrient mediums(100mM potassium phosphates delay Fliud flushing(pH6.0), wherein containing 1% yeast extract, 2% peptone, Yeast Nitrogen base 1.34%, biotin 4*10-5%, glucose 2%, glycerine 1%)In, cultivated in 30 DEG C, 200rpm to OD600 and reach 5.0.
Above-mentioned culture is transferred in 1L BMGY fluid nutrient mediums, is cultivated 24 hours in 30 DEG C, 200rpm, adds 5ml Methanol, then proceedes to cultivate 8 days in 30 DEG C, 200rpm, adds within during which every 24 hours 5ml methanol, ventilation control dissolved oxygen(DO)Greatly In 20%, and it is 6.0 to control pH(Adjusted with ammoniacal liquor).After the completion of culture, with 0.22 μm of membrane filtration and retain supernatant, on this Clear liquid is detected through SDS-PAGE is wherein rich in the corresponding protein of zytase, and thus fermentation obtains zytase supernatant.
Fresh supernatant is taken, is divided into three parts, portion refrigeration is stand-by(A), potassium phosphate is used after portion freeze-drying to solid Buffer solution(pH6.0)Again dissolve(B), it is a to use kaliumphosphate buffer after evaporation drying to solid in 80 DEG C of baking ovens (pH6.0)Again dissolve(C);Control uses phosphoric acid using the xylanase gene of No. 201210185883 discoveries of Chinese Patent No. Potassium buffer solution(pH6.0)It is divided into three parts after dissolving, portion refrigeration is stand-by(CA), another two parts are freeze-dried respectively(CB)With 80 DEG C of bakings Case evaporation drying(CC), kaliumphosphate buffer is then dissolved in again(pH6.0).These xylanase activities are determined respectively, are converted into The enzyme activity of original unit's volume supernatant or Unit Weight, is calculated due to the enzyme activity loss late that high temperature dehydration is caused, as a result such as the institute of table 1 Show, show relative to it is original we have found that high temperature resistant dehydration zytase, the zytase of saltant type of the invention, although High temperature resistant water separation capability is slightly worse than original, but still remains more than 75% activity, especially surprisingly, enzyme activity Property, which has, to be obviously improved, even if by high temperature dehydration, the absolute value of its enzymatic activity is still above original zytase, even Higher than enzyme activity of original zytase when without high temperature dehydration.
The high temperature dehydration enzyme activity loss late of the zytase of the invention and commercially available of table 1
Sample Enzyme activity Loss late Sample Enzyme activity Loss late
A 3.7*104IU/L CA 2.4*104IU/L
B 3.5*104IU/L 5.4% CB 2.2*104IU/L 8.3%
C 2.8*104IU/L 24% CC 2.0*104IU/L 17%
The coating of the 1B of embodiment 3
The method recorded according to us in preceding Chinese patent 201210440083, it is 63.5% to obtain 1B content(w/ w)The sulfate containing 1B granular core(Itself it is commercially pure 1B sulfate), no longer with low-purity 1B outer layer covers, directly as the lysine raw material of the feed of the present invention.
The formula of the feed addictive of the present invention of table 2
Formula 1 Formula 2 Formula 3 Formula 4
Lysine raw material 46kg 45kg 46kg 45kg
Sodium glutamate / 1kg / 1kg
Microcrystalline cellulose 4kg 4kg 4kg 4kg
Dextrin 1kg 1kg 1kg 1kg
Carboxymethyl cellulose(CMC) 0.5 0.5 0.5 0.5
Zytase / / 9*105IU 9*105IU
Rumen-undegraded fat powder 48.5kg 48.5kg 48.5kg 48.5kg
As shown in table 2, detailed process is as follows for coating raw material used:
By lysine raw material, microcrystalline cellulose and the dextrin of formula ratio and(When formula contains sodium glutamate)Paddy Propylhomoserin sodium pours into trough type mixing machine, is well mixed, and obtains coating core mixture;
By the carboxymethyl cellulose of formula ratio 25L water(When formula does not contain zytase)Or according to implementation Zytase supernatant prepared by the method for example 2(When formula contains zytase)Soak, be configured to 2% CMC solution, Then directly pour into above-mentioned coating core mixture, be well mixed, form softwood;
Above-mentioned softwood is poured into swing comminutor, through 30 eye mesh screens(Aperture is 0.6mm), diameter, which is made, is about 0.6mm coarse granule;
Above-mentioned coarse granule is poured into ball blast 3 minutes in the ball-type shot-blasting machine run with 2200rpm, circular micropill is formed;
Above-mentioned micropill is placed in the fluidized granulation seed-coating machine of 60 DEG C of EAT and dried 45 minutes, then respectively through 30 Eye mesh screen(Aperture is 0.6mm)With 40 eye mesh screens(Aperture is 0.425mm), reservation can be by 30 eye mesh screens and by 40 mu of screen clothes section The particle diameter stayed is 0.425-0.6mm coating slug particle;
The rumen-undegraded fat powder of formula ratio is placed in oil tank and is heated to 90 DEG C, until completely melted, in 80 DEG C of insulations simultaneously The shower nozzle for connecting fluidized granulation seed-coating machine is sprayed into fluidized granulation seed-coating machine, is sprayed on above-mentioned coating slug particle surface therein, its Middle fluidized granulation seed-coating machine air-introduced machine rotating speed 3500rpm, 60 DEG C of EAT finally respectively obtains coating slug particle and rumen bypass Fatty powder weight ratio about 1:1 above-mentioned four kinds of formulas distinguish corresponding coated 1B feed addictive.
In addition, being prepared according to the formula of formula 1 substantially according to said process, different is to omit ball blast step, i.e., Directly coarse granule is placed in the fluidized granulation seed-coating machine of 60 DEG C of EAT and dried, the 1B for obtaining control technique 1 is raised Feed additives;
Prepared according to the formula of formula 1 substantially according to said process, different is that two steps are sieved after omission is dried Step, i.e., after being dried 45 minutes in the fluidized granulation seed-coating machine of 60 DEG C of EAT, do not sieve, directly by all particles all Proceed next step coating, obtain the 1B feed addictive of control technique 2.
The degraded test of the coated 1B feed addictive of embodiment 4
According to Zhao He etc.(Different proportion sheep's hay and the research China of ensilage dry matter degradability in cow rumen Ox industry science, 34 (2):13-16)Description internal Nylon Bag, in adult dairy cattle to according to the method for embodiment 3 prepare it is each Plant coated feed addictive and carry out degraded test, testing index is used as using wherein 1B.In the case of not coated, The degradation rate of 1B is up to more than 95% after 2 hours(That is 1B conservation rate is less than 5%), and coated feed addictive Conservation rate is as shown in table 3 below:
The anti-degradation effect of the feed addictive of the present invention of table 3
As shown in table 3, but if the method recorded relative to us in preceding Chinese patent 201210440083, the present invention Coating technique can further extend remaining time of the 1B in animal stomach, wherein whether with the addition of the present invention wood Dextranase influences little for encapsulating effect, although it was unexpectedly determined that ball blast and the technique of screening are very small, but adopt Conservation rate about 10% can be improved after, more surprisingly, if wherein adding a small amount of sodium glutamate(If only added Plus glutamic acid, effect will significantly be not so good as its sodium salt), will make it that coated particle is not allowed more easily rupturable so that bad ammonia therein Acid release is more smooth, either in short term(In 2 hours)Or it is long-term(Such as 24 or 48 hours), all significantly improve lysine Anti- degradation effect in cud.
Effectiveness of the coated 1B feed addictive of embodiment 5 to calf growth effect
Commission herding research institute of Ningxia academy of agricultural sciences is fed with March with all feeds additive prepared according to the method for embodiment 3 The calf in age 8 weeks, to be fed with the feed addictive without the present invention(Only feed basal diet)With with the addition of commercially available non-packet The equivalent lysine additives for forage of quilt is control.As a result it is as shown in table 4 below:
Growth effect of the feed addictive of the present invention of table 4 to calf
Feed Initial average weight(kg) Terminate average weight(kg) Increased weight(kg) Increased weight increase rate(%)
Basal diet 125.7 165.3 39.6 /
Basal diet+not coated lysine 126.1 166.9 40.8 3.0
Basal diet+formula 1 125.6 169.5 43.9 10.9
Basal diet+formula 2 126.4 170.5 44.1 11.4
Basal diet+formula 3 125.8 171.0 45.2 14.1
Basal diet+formula 4 124.8 170.3 45.5 14.9
As shown in table 4, growth of the feeding 1B to calf has certain facilitation, but if directly feeds Raise, its facilitation is very limited, only less than 5%, and the feed of equivalent lysine is added after being coated with by the method for the present invention Additive, can remarkably promote growth, improve more than 10%, more can be further after the zytase that especially with the addition of the present invention Promote growth about 4%.Due to being fed with frequency in experiment(Twice daily)It is higher, therefore the longer time of some formulas of the present invention Encapsulating conservation rate advantage embody not to be in the influence for growing calf very fully, but still old 0.5% and more than Lifting, it is contemplated that it is actual raise in can embody more notable.In addition, during experiment, without adverse reaction report, showing the present invention Formula be safe.
<110>Ningbo Eppen Biotech Co., Ltd.
<120>The zytase of mutation and its application in 1B product
<130>Electronic application
<160> 5
<170> PatentIn version 3.3
<210> 1
<211> 1428
<212> DNA
<213>Artificial sequence
<400> 1
atgattagcc tggcggcgag cctgccgatt ccgctggtga gcgcgctgcc gcatgcgcat 60
attagcgtga acgcgcatac ccgctttcag caggtggatg gctttggctt tagcgaagcg 120
tttcagcgcg cgtccgatat ttatggcaaa gatggcctga gcccggaaga tcgcacccgc 180
gtgctggatc tgctgtttag cgatacccgc ggcgcgggcc tgaccattgt gcgcaacggc 240
attggcagca acagcaccat taaagatttt atgaacagca ttgaaccgtt tagcccgggc 300
agcccgagcg cgccgccgca ttatgtgtgg gatcgcaacg atagcggcca ggtgtggctg 360
agccatgaag cggcgagcta tggcgtgaac accttttatg cggatgcgtg gagcgcgccg 420
ggctatatga aaaccaacga tgatgatagc aacggcggct atctgtgcgg cgtgagcaac 480
accagctgcg cgagcggcga ttggaaacag gcgtatgcga actatctggt gcagtatatt 540
catttttatc agcaggtggg cattaaagtg acccatctgg gctttctgaa cgaaccgcag 600
gaagatgtga cctatgcgag catgctgagc gatggcaccc aggcggcggc ggattttatt 660
aaagtgctgg cgccgaccgt gaaagcggcg ggcctggatg tgaaactgac ctgctgcgat 720
ggcgtgggct gggaagaaca gcgcgcgatg ctgccgggcc tgcaggcggg cggcccggaa 780
catagcgcgg aaagctatct gagcgtgatt accgcgcatg gctataacag cccgccgacc 840
accccgctgg aaaccagcct gccggtgtgg atgaccgaat gggcggatct gaacgataac 900
tataccgcgg cgtggtatga aaacggcgcg ccgggcgaag gcctgacctg ggcgaaccgc 960
attcaggatg cgtttacccg cagcaacgtg agcgcgtttc tgcattggat tggcgcggaa 1020
aacggcacca gcaacagccc gctgattaac ctgaacggcg atagctatgt ggcgagcaaa 1080
cgcctgtggg cgtttggcca gtttagccgc tttgtgcgcc cgggcgcggt gcgcattgat 1140
gcggcgagca gcgatccgct ggtgaccgtg agcgcgtttc agaacaaaga aaacggcgtg 1200
gtggcgaccc aggtgattaa caacgcggat accgattatg aagtggaagt ggatctgacc 1260
ggccgcggcc atctggtgag cgtggtgcag ccgtatctga ccaacaacga acatgatctg 1320
gaagcgagca gcccgattat taccctggcg ctgggcgcgg cgaccaaatt taccagcatt 1380
gtgccggcgc gcagcctggt gagctttgtg agcaaaaccg cgctgtaa 1428
<210> 2
<211> 475
<212> PRT
<213>Artificial sequence
<400> 2
Met Ile Ser Leu Ala Ala Ser Leu Pro Ile Pro Leu Val Ser Ala Leu
1 5 10 15
Pro His Ala His Ile Ser Val Asn Ala His Thr Arg Phe Gln Gln Val
20 25 30
Asp Gly Phe Gly Phe Ser Glu Ala Phe Gln Arg Ala Ser Asp Ile Tyr
35 40 45
Gly Lys Asp Gly Leu Ser Pro Glu Asp Arg Thr Arg Val Leu Asp Leu
50 55 60
Leu Phe Ser Asp Thr Arg Gly Ala Gly Leu Thr Ile Val Arg Asn Gly
65 70 75 80
Ile Gly Ser Asn Ser Thr Ile Lys Asp Phe Met Asn Ser Ile Glu Pro
85 90 95
Phe Ser Pro Gly Ser Pro Ser Ala Pro Pro His Tyr Val Trp Asp Arg
100 105 110
Asn Asp Ser Gly Gln Val Trp Leu Ser His Glu Ala Ala Ser Tyr Gly
115 120 125
Val Asn Thr Phe Tyr Ala Asp Ala Trp Ser Ala Pro Gly Tyr Met Lys
130 135 140
Thr Asn Asp Asp Asp Ser Asn Gly Gly Tyr Leu Cys Gly Val Ser Asn
145 150 155 160
Thr Ser Cys Ala Ser Gly Asp Trp Lys Gln Ala Tyr Ala Asn Tyr Leu
165 170 175
Val Gln Tyr Ile His Phe Tyr Gln Gln Val Gly Ile Lys Val Thr His
180 185 190
Leu Gly Phe Leu Asn Glu Pro Gln Glu Asp Val Thr Tyr Ala Ser Met
195 200 205
Leu Ser Asp Gly Thr Gln Ala Ala Ala Asp Phe Ile Lys Val Leu Ala
210 215 220
Pro Thr Val Lys Ala Ala Gly Leu Asp Val Lys Leu Thr Cys Cys Asp
225 230 235 240
Gly Val Gly Trp Glu Glu Gln Arg Ala Met Leu Pro Gly Leu Gln Ala
245 250 255
Gly Gly Pro Glu His Ser Ala Glu Ser Tyr Leu Ser Val Ile Thr Ala
260 265 270
His Gly Tyr Asn Ser Pro Pro Thr Thr Pro Leu Glu Thr Ser Leu Pro
275 280 285
Val Trp Met Thr Glu Trp Ala Asp Leu Asn Asp Asn Tyr Thr Ala Ala
290 295 300
Trp Tyr Glu Asn Gly Ala Pro Gly Glu Gly Leu Thr Trp Ala Asn Arg
305 310 315 320
Ile Gln Asp Ala Phe Thr Arg Ser Asn Val Ser Ala Phe Leu His Trp
325 330 335
Ile Gly Ala Glu Asn Gly Thr Ser Asn Ser Pro Leu Ile Asn Leu Asn
340 345 350
Gly Asp Ser Tyr Val Ala Ser Lys Arg Leu Trp Ala Phe Gly Gln Phe
355 360 365
Ser Arg Phe Val Arg Pro Gly Ala Val Arg Ile Asp Ala Ala Ser Ser
370 375 380
Asp Pro Leu Val Thr Val Ser Ala Phe Gln Asn Lys Glu Asn Gly Val
385 390 395 400
Val Ala Thr Gln Val Ile Asn Asn Ala Asp Thr Asp Tyr Glu Val Glu
405 410 415
Val Asp Leu Thr Gly Arg Gly His Leu Val Ser Val Val Gln Pro Tyr
420 425 430
Leu Thr Asn Asn Glu His Asp Leu Glu Ala Ser Ser Pro Ile Ile Thr
435 440 445
Leu Ala Leu Gly Ala Ala Thr Lys Phe Thr Ser Ile Val Pro Ala Arg
450 455 460
Ser Leu Val Ser Phe Val Ser Lys Thr Ala Leu
465 470 475
<210> 3
<211> 22
<212> DNA
<213> Artificial
<220>
<223>Forward primer
<400> 3
cgaattcgat gattagcctg gc 22
<210> 4
<211> 25
<212> DNA
<213> Artificial
<220>
<223>Reverse primer
<400> 4
agcggccgca ttacagcgcg gtttt 25

Claims (16)

1. the zytase of mutation, its amino acid sequence such as SEQ ID No:Shown in 2.
2. encode the gene of the zytase described in claim 1.
3. the gene described in claim 2, its nucleotide sequence such as SEQ ID No:Shown in 1.
4. include the carrier of the gene described in Claims 2 or 3.
5. strain, it includes the gene described in Claims 2 or 3, or with the carrier conversion or transfection described in claim 4 .
6. the strain described in claim 5, it is secreting, expressing bacterium.
7. the strain described in claim 6, it is yeast.
8. the method for the zytase described in fermenting and producing claim 1, it includes culture claim 5-7 under fermentation conditions One of described in strain, the zytase described in claim 1 is isolated from culture.
9. purposes of the zytase in the product containing 1B is prepared described in claim 1.
10. the purposes described in claim 9, wherein product are feed addictives.
11. the purposes described in claim 9, wherein the product containing 1B includes coating slug particle and is wrapped in coating core Coated layer on grain, wherein coated layer are rumen-undegraded fats, coating slug particle include claim 1 described in zytase, rely Propylhomoserin salt, filler and adhesive and sodium glutamate.
12. the purposes described in claim 9, wherein the zytase in every gram of product containing 1B described in claim 1 Activity is 5 ~ 15IU.
13. the purposes described in claim 12, wherein the zytase in every gram of product containing 1B described in claim 1 Activity is 8 ~ 10IU.
14. the purposes described in claim 13, wherein the zytase in every gram of product containing 1B described in claim 1 Activity is 9IU.
15. the purposes described in claim 9, wherein the method prepared includes:
(1)Lysine salt and filler and sodium glutamate are well mixed, mixture is formed;
(2)To step(1)The binder solution containing zytase is added in the mixture of acquisition, is well mixed, softwood is formed;
(3)By step(2)The softwood sieving of acquisition, forms coarse granule;
(4)By step(3)The coarse granule ball blast of acquisition, forms circular micropill;
(5)Drying steps(4)The circular micropill of acquisition is simultaneously sieved, and forms coating slug particle;With,
(6)Optionally, rumen-undegraded fat is sprayed on step(5)On the coating slug particle of acquisition.
16. the purposes described in claim 15, wherein step(3)In sieve be 30 mesh sieves.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102763771A (en) * 2012-06-07 2012-11-07 宁夏伊品生物科技股份有限公司 Fermentation and coating of lysine and xylanase
CN103355502A (en) * 2012-06-07 2013-10-23 宁夏伊品生物科技股份有限公司 Fermentation and coating of lysine and compound enzyme
CN104039959A (en) * 2011-11-11 2014-09-10 诺维信股份有限公司 Polypeptides having xylanase activity and polynucleotides encoding same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104039959A (en) * 2011-11-11 2014-09-10 诺维信股份有限公司 Polypeptides having xylanase activity and polynucleotides encoding same
CN102763771A (en) * 2012-06-07 2012-11-07 宁夏伊品生物科技股份有限公司 Fermentation and coating of lysine and xylanase
CN103355502A (en) * 2012-06-07 2013-10-23 宁夏伊品生物科技股份有限公司 Fermentation and coating of lysine and compound enzyme
CN103444984A (en) * 2012-06-07 2013-12-18 宁夏伊品生物科技股份有限公司 Lysine and xylanase fermented and coated feed

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