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Shuttle plasmid vector and its construction method and application

A technology for shuttle plasmids and construction methods, which is applied in the direction of introducing foreign genetic material using vectors, DNA preparation, recombinant DNA technology, etc., and can solve the problems of instability of yeast artificial chromosome plasmids and insufficient quality and quantity

Active Publication Date: 2016-04-27
WUHAN INST OF VIROLOGY CHINESE ACADEMY OF SCI
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Problems solved by technology

However, because the yeast artificial chromosome plasmid is unstable in yeast cells, the quality and quantity of the plasmid DNA obtained by separation and purification through agarose gel cannot meet the requirements of later stage molecular biology and cytology experiments; therefore, a kind of A shuttle plasmid vector capable of shuttling between yeast and bacteria, capable of recombination cloning, self-replication, recombinant selection in yeast, and stable replication and storage in bacteria, facilitating DNA purification and isolation is a person skilled in the art A technical problem to be solved

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  • Shuttle plasmid vector and its construction method and application
  • Shuttle plasmid vector and its construction method and application
  • Shuttle plasmid vector and its construction method and application

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Embodiment 1

[0029] For the construction method of this shuttle plasmid vector provided by the embodiment of the present invention, please refer to figure 2 , including the following steps:

[0030] Step 101: using the cosmid pRS313 vector as a template, performing PCR by setting primers to obtain the HIS3 screening element whose nucleotide sequence is shown in SEQ ID NO.2;

[0031] In step 101, according to the nucleotide sequence information on GenBank (U03439) combined with the information of the cosmid pRS313, specific primers are set, and the HIS3 screening element is obtained by PCR operation; its sequence is shown in SEQ ID NO.2.

[0032] Step 102: Synthesize the CEN6-ARSH4 yeast replication sequence, and introduce restriction endonuclease sites BamHI and EcoRI at its two ends respectively, and then ligate it into the pUC19 plasmid;

[0033] Step 103: The pUC19 plasmid containing the CEN6-ARSH4 yeast replication sequence is double-digested with BamHI and EcoRI to obtain the CEN6-A...

Embodiment 2

[0042] In this embodiment, the preparation method of the shuttle plasmid vector comprises the following steps:

[0043] S1: Consistent with the above step 101, specifically, the primers used are YF1 and YR1, and their nucleotide sequences are shown in SEQ ID NO.4 and SEQ ID NO.5 in turn.

[0044] Specifically, primers YF1 and YR1 (the first 23 bp of the upstream primer YF1 is homologous to the terminal sequence of the yeast replication element CEN6-ARSH4, as shown in the bold underlined part below).

[0045] YF1: GTTACAGGCAAGCGATCCGTCCG GAAACCATTATTATCATGACATTAACCT;

[0046] YR1: TCCCCCGGGACGCATCTGTGCGGTATTTC.

[0047] The specific conditions for PCR are:

[0048] The total reaction volume is 25 μl: including 10×KOD-PLUS buffer 2.5 μl; 2mMdNTPs 2.5 μl; 25mM MgSO4 1.2 μl; template pRS3131 μl; primer YF11 μl; primer YR11 μl; 2 O15.3μl; the reaction program is: 94°C 2min; 94°C 15sec, 59°C 25sec, 68°C 2min, 30 cycles; 68°C 5min extension; 4°C 5min; after PCR amplification, th...

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Abstract

The invention relates to the field of biotechnology, and particularly relates to a shuttle plasmid vector, as well as a construction method and applications thereof. The shuttle plasmid vector can shuttle in yeast and Escherichia coli, and the nucleotide sequence of the shuttle plasmid vector is shown in SEQ ID NO.1. Compared with the prior art, he shuttle plasmid vector realizes the shuttling in yeast and bacteria, and has the capabilities of homologous recombination cloning, self replication and recombinant screening in yeast, as well as the characteristics of being stable in replication and maintenance and convenient for DNA purification and separation in bacteria.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a shuttle plasmid vector and its construction method and application. Background technique [0002] Since the process of cell life involves complex physiological and biochemical reactions, in most cases it is controlled by multiple genes or gene clusters, and these regulations are often closely related to the genetic information of hundreds or even thousands of kb of DNA fragments. In order to better understand these To analyze the functions of genes or gene clusters, and to study the biological laws and significance in the phenomenon of cell life, this requires new technologies to selectively isolate or artificially synthesize and transform some genomic DNA fragments larger than 20kb, so as to comprehensively accelerate genomics and The research progress of genome functional segments. [0003] At present, the polymerase chain reaction (PCR) is the most direct and effective technica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/81C12N15/66C12N15/10
Inventor 肖庚富侯政周拯王宗林王薇
Owner WUHAN INST OF VIROLOGY CHINESE ACADEMY OF SCI
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