Mycoplasma bovis VspX gene mutant strain, and construction method and application thereof
A technology of Mycoplasma bovis and a construction method, applied in the prevention and treatment of animal infectious diseases, the construction method of the strain and its application in the fields of Mycoplasma bovis pathogenic mechanism and immune prevention and control
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0016] Embodiment 1: Mycoplasma bovis insertion mutant library construction
[0017] The pMT85 plasmid was donated by Dr. Eric Baranowski of the French Academy of Agricultural Sciences (Baranowski, Guiral et al. 2010), which contains a mini-Tn4001 transposon (mini-Tn Tn4001), which has been introduced into the transposon encoded by the aacA-aphD gene The gentamicin resistance marker, which is located between the two inverted repeats (IR) at both ends of the transposition fragment, and the transposase gene (tnpA) is located outside the repeat sequence, which can prevent transposition from occurring again.
[0018] Use M.bovis HB0801 as the parent strain to construct a mutant library, collect the M.bovis cultured to the late logarithmic phase, wash twice with cold DPBS buffer, and resuspend in 0.1M CaCl 2 The solution was incubated on ice for 30 min; the prepared Mycoplasma bovis competent cells were mixed with 3 μg pMT85 plasmid, 10 μg yeast tRNA and 1 mL 50% PEG8000. After 1 ...
Embodiment 2
[0019] Embodiment 2: Screening and Identification of Mycoplasma bovis VspX Gene Mutants
[0020] 1. Genome sequencing to screen mutant strains
[0021] The genomic DNA (gDNA) of the mutant strain in the mutant library was extracted by CTAB method, and sent to Wuhan Ruizhi Mofang Biotechnology Co., Ltd. to sequence the junction of the transposon sequence and the genome of the mutant strain, and the sequencing results were compared with the whole genome sequence of M.bovis HB0801 The comparison results show that there is a transposon sequence in the VspX gene (sequence shown in SEQ ID NO: 1), and the min-Tn4001 transposon insertion site is located after the 548342 site of the genome and at the 384 site of the VspX gene rear( figure 1 ), the mutant strain was named M.bovis T8.101.
[0022] 2. Western blot to verify protein expression of mutant strains
[0023] After culturing T8.101 and wild strains in PPLO medium for 48 hours, the cells were collected, and after lysing, the w...
Embodiment 3
[0024] Embodiment 3: growth characteristics test of Mycoplasma bovis mutant strain T8.101
[0025] The growth curve and colony morphology of the mutant strains were detected by routine methods.
[0026] 1. Growth curve determination
[0027] After recovering T8.101 and wild strains, they were inoculated on PPLO solid medium, 37°C, 5% CO 2 Cultured in the incubator for 72h. After picking 3 single clones of each strain, they were inoculated in 1mL PPLO liquid medium, cultured at 37°C for 96h, and the bacterial solution was spread on the PPLO plate every 12h. After 72h of culture, the number of colonies was counted under a microscope and Draw the growth curve of each bacteria. The results showed that the growth rate and growth state of T8.101 and the wild strain were similar without significant difference. They were in the logarithmic phase at 12-24h, at the plateau phase at 24-60h, and then entered the decline phase ( image 3 )
[0028] 2. Colony morphology observation
...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com