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Uridine-5'-diphosphate galactose epimerase derived from ornithogalum caudatum, nucleotide sequence of uridine-5'-diphosphate galactose epimerase and application

A technology of galactose diphosphate and epimerase, applied in the direction of isomerase, application, biochemical equipment and methods, etc.

Active Publication Date: 2017-09-15
INST OF MATERIA MEDICA AN INST OF THE CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] So far, it has been found in plants such as Arabidopsis thaliana (Arabidopsis thaliana), gramineous plant barley (Hordeum vulgare), leguminous plant pea (Pisum sativum) and bacteria such as Sinorhizobium meliloti (Sinorhizobium meliloti). The UDP-galactose epimerase gene was cloned, but there is no report on the isolation of this protein from the Asparagaceae plant Ornithogalum caudatum

Method used

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  • Uridine-5'-diphosphate galactose epimerase derived from ornithogalum caudatum, nucleotide sequence of uridine-5'-diphosphate galactose epimerase and application
  • Uridine-5'-diphosphate galactose epimerase derived from ornithogalum caudatum, nucleotide sequence of uridine-5'-diphosphate galactose epimerase and application
  • Uridine-5'-diphosphate galactose epimerase derived from ornithogalum caudatum, nucleotide sequence of uridine-5'-diphosphate galactose epimerase and application

Examples

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Embodiment 1

[0029] Example 1. Transcriptome Sequencing and Sequence Analysis

[0030] After extracting the total RNA from the sterile bulb of Dieffenbachia tiger eye, using the mRNA as a template, the first cDNA strand was synthesized with six base random primers (randomhexamers), and then the second cDNA was synthesized by adding buffer, dNTPs, RNase H and DNA polymerase I After purification by QiaQuick PCR kit and elution with EB buffer, end repair, poly(A) was added and sequencing adapters were connected, then fragment size selection was performed by agarose gel electrophoresis, and finally PCR amplification was carried out to construct Good sequencing library with Illumina HiSeq TM 2000 for sequencing.

[0031]The original image data obtained by sequencing is converted into sequence data through base calling, that is, raw data or rawreads. Perform data filtering on raw reads, remove reads with adapters, duplicates, and low-quality sequencing, and obtain clean reads. Use the short ...

Embodiment 2

[0033] Example 2 OcUGE2 gene cloning

[0034] Take 100mg of aseptic bulbs of Dieffenbachia tiger's eye, freeze them quickly in liquid nitrogen, grind them into fine powder with a mortar, and use Trizol extraction to extract total RNA from the aseptic bulbs of Dieffenbachia tiger's eye. Using RT-PCR Kit (ReverTra-Plus-, TOYOBO company) to reverse transcribe the total RNA of Diofenbachia sterile bulbs into cDNA. The reverse transcription system and procedure are as follows: add 1 μg of total RNA to 20 μL system, RNase Free H 2 O 4 μL, Oligo(dT) 20 1 μL, after incubating at 65°C for 5 minutes, immediately place it on ice to cool, then add 4 μL of 5×RT buffer, 1 μL of RNase Inhibitor (10U / μL), 1 μL of dNTP Mixture (10mM) and ReverTra Ace to the above tube, at 30°C Incubate for 10 minutes, incubate at 42°C for 60 minutes, denature at 85°C for 5 minutes, and place on ice for 5 minutes to complete cDNA synthesis. The cDNA was stored at -20°C for later use.

[0035] Two pairs of ...

Embodiment 3

[0038] Example 3 Construction of OcUGE2 expression vector

[0039] According to the principle of homologous recombination of In-Fusion (Clontech Company), with the correctly sequenced plasmid pEASY-OcUGE2 as a template, pET28aUGE2 (5'-CGCGGATCCGAATTCATGGCGGGTTTGAACA-3', SEQ ID NO.8) and pET28aUGE2 (5'-TGCGGCCGCAAGCTTCTAATTATTCACTAGT-3 ', SEQ ID NO.9) as primers, PCR was carried out through the following procedures and systems, 50 μL system containing 10×PCR buffer 5 μL, 2mM dNTPs 5 μL, 25mM MgSO4 3 μL, 10 μM primers pET28aUGE2 and RETduetUGE2 each 1.5 μL, KOD-Plus -Neo 1 μL, plasmid 1 μL, ddH2O make up. PCR program: pre-denaturation at 94°C for 5 min; denaturation at 98°C for 30 s, renaturation at 63°C for 45 s, extension at 68°C for 120 s, a total of 30 cycles; extension at 68°C for 7 min, and incubation at 4°C. A 1kb OcUGE2 gene was amplified. The gene was connected to pET-28a treated with EcoRI and HindIII double enzymes by In-Fusion method, the recombinant product was tr...

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Abstract

The invention provides uridine-5'-diphosphate galactose epimerase derived from ornithogalum caudatum, a nucleotide sequence for encoding uridine-5'-diphosphate galactose epimerase genes, a carrier with the encoding nucleotide sequence, a host cell with the encoding nucleotide sequence and an application of the uridine-5'-diphosphate galactose epimerase or the cell with the uridine-5'-diphosphate galactose epimerase to reaction of catalysis substrates such as uridine-5'-diphosphate xylose, uridine-5'-diphosphate arabinose, uridine-5'-diphosphate glucose and uridine-5'-diphosphate galactose. The amino acid sequence of the uridine-5'-diphosphate galactose epimerase is as shown in SEQ ID NO. 1, and the nucleotide sequence is as shown in SEQ ID NO. 3.

Description

technical field [0001] The invention relates to a uridine-5'-diphosphate galactose epimerase derived from Dieffenbachia tiger's eye, its coding gene and its catalytic substrate uridine-5'-diphosphate xylose to uridine- 5'-arabinose diphosphate, the catalytic substrate uridine-5'-diphosphate arabinose is uridine-5'-diphosphate xylose, the catalytic substrate uridine-5'-diphosphate glucose is uridine-5 '-Galactose diphosphate, the catalytic substrate uridine-5'-galactose diphosphate is used in four reactions of uridine-5'-glucose diphosphate, which belongs to the field of genetic engineering. Background technique [0002] Uridine-5'-diphosphate-galactose epimerase (UGE) is the enzyme that catalyzes uridine-5'-diphosphate-galactose (UDP-galactose) and uridine-5'-diphosphate-glucose (UDP-glucose) in vivo -glucose) interconversion key enzyme. UGE can epimerize the 4-position hydroxyl on the pyranose ring of uridine-5’-diphosphogalactose (UDP-galactose) to form UDP-glucose ( fi...

Claims

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Application Information

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IPC IPC(8): C12N9/90C12N15/61C12P19/30
CPCC12N9/90C12P19/305
Inventor 孔建强尹森
Owner INST OF MATERIA MEDICA AN INST OF THE CHINESE ACAD OF MEDICAL SCI
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