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Method for expressing protein in geotrichum candidum resting spores

A technology of Geotrichum candidum spores and dormant spores, which is applied in the biological field, can solve the problems of non-application, and achieve the effect of eliminating cathode effect, avoiding killing cells, and improving cell survival rate

Inactive Publication Date: 2016-11-23
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, whether HDEN electroporation technology can be applied to species other than mammalian cells is still unknown.

Method used

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  • Method for expressing protein in geotrichum candidum resting spores
  • Method for expressing protein in geotrichum candidum resting spores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Expression of green fluorescent protein (GFP) in Geotrichum candidum cells:

[0067] 1. Plasmid construction

[0068] Using the GFP gene coding sequence, the GFP gene is shown in SEQ ID NO.5,

[0069] The protein sequence of the above GFP gene is shown in SEQ ID NO.6,

[0070] PCR primers for amplifying the GFP gene:

[0071] F: AGAT GCTAGC GTGAGCAAGGGC wavy line is Aat II restriction site

[0072] R: ACGC GTC GAC TTACTTGTACAGCTCGT The wavy line is the Sal I restriction site

[0073] The underlined GCTAGC sequence in primer F is used to promote the binding of the translation initiation factor to RNA after the DNA is transcribed into RNA, and this sequence is adjacent to the initiation codon ATG of the expressed target gene. After using the above pair of primers for PCR, GCTAGC can be carried upstream of the GFP gene, and restriction sites can be carried upstream and downstream.

[0074]

[0075] After agarose gel electrophoresis was used to detect that t...

Embodiment 2

[0105] Expression of red fluorescent protein (RFP) in Geotrichum candidum cells:

[0106] 1. Plasmid construction

[0107] The nucleic acid sequence of RFP is shown in SEQ ID NO.7,

[0108] The protein sequence of RFP is shown in SEQ ID NO.8,

[0109] The primers for amplifying the RFP gene are as follows:

[0110] Upstream primer: RFP-F:5'CGGAATTC GCCACC ATGGCCTCCTCCGAGGACGT 3'

[0111] Downstream primer: RFP-R: 5' TCGAGCTCGTTAGGCGCCGGTGGAGTGG 3'

[0112] The 5-end of the upstream primer has an EcoR I restriction site and an underlined GCCACC sequence, which is used to promote the transcription of the DNA into RNA, and the translation initiation factor binds to the RNA. This sequence is consistent with the start codon of the expressed target gene ATG is next door.

[0113] The 5-end of the downstream primer has a Sal I restriction site.

[0114] According to the method of Example 1, the RFP gene was amplified by PCR, molecularly cloned, connected to the pGEM-T easy vec...

Embodiment 3

[0130] Expression of yellow fluorescent protein (YFP) in Geotrichum candidum cells:

[0131] 1. Plasmid construction

[0132] The nucleic acid sequence of YFP is shown in SEQ ID NO.9,

[0133] The protein sequence of YFP is shown in SEQ ID NO.10,

[0134] Using the same primers as GFP in Example 1, and according to the same experimental steps and methods, the GFP gene was amplified by PCR, molecularly cloned, connected to the pGEM-T easy vector, and then transcribed in vitro, and the resulting RNA was transformed Host spores.

[0135] 2. Use the coding RNA of yellow fluorescent protein to express yellow fluorescent protein in dormant spores of Geotrichum candidum, the steps are as follows:

[0136] 1) Geotrichum candidum culture and spore collection

[0137] In a 15cm petri dish, prepare a solid agar medium (PDA medium), inoculate Geotrichum candidum CICC 32222 on the surface of the solid agar medium, and cultivate it for 3 days at a temperature of 40°C and a humidity of 6...

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Abstract

The invention discloses a method for expressing protein in geotrichum candidum resting spores. The method comprises the following three steps: geotrichum candidum culture and spore collection, geotrichum candidum spore pretreatment and electric shock of geotrichum candidum spores using a HDEN process. According to the method, without a step of fungal spore germination and by adopting the HDEN electrotransformation technology, the in-vitro single-stranded coded protein RNA is delivered to pass the cell wall and cell membrane, and the protein is expressed in the geotrichum candidum resting spores. The method disclosed by the invention has the advantages of simple and fast steps and perfect effect while the transformation rate reaches 90% or above.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for expressing protein in dormant spores of Geotrichum candidum. Background technique [0002] The central dogma of molecular biology refers to the transfer of genetic information from DNA to RNA, and then from RNA to protein, that is, the process of completing the transcription and translation of genetic information. In modern genetic engineering, hosts are often used to express foreign proteins. The usual method is to construct a plasmid vector, put the coding DNA sequence of the foreign protein behind a strong promoter, and after being introduced into the host cell, the coding DNA sequence is transcribed into mRNA sequence (single-stranded RNA), and the mRNA sequence is expressed into a protein molecule by the translation machinery in the cell, completing the whole process of exogenous protein expression. [0003] Whether as a plasmid free from the host genom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N15/87
Inventor 林峻
Owner FUZHOU UNIV
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