Team:Cornell/project/wetlab/fungal toolkit/fungal transformation

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Cornell University Genetically Engineered Machines

Fungal Transformation

PEG Mediated Transformation

Background
Methods
Transformants
Transformants of vector pHG, which conferred resistance against hygromycin.
Transformants of vector pNG, which conferred resistance against geniticin.
Transformants of a construct with GFP under the control of the trpc constitutive promoter between homology regions extracted from pNG.
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Agrobacterium Mediated Transformation

Background
Wide varieties of plant and fungal cells can be easily and efficiently transformed by agrobacterium-mediated transformation. In this process, plant or fungal tissue is co-cultured with Agrobacterium tumefaciens, an organism that is able to transfer part of its DNA to plants and fungi, known as T-DNA. Genetic constructs can be inserted into these T-DNA vectors and then transformed into A. tumefaciens, allowing it to insert this construct into a plant or fungal genome [1].
Methods
In order to transform our genetic constructs into Ganoderma lucidum, we first inserted them into pOSCAR, a T-DNA vector that contains regions that A. tumefaciens can insert into fungal cells. Following transformation of A. tumefaciens with our constructs in the pOSCAR vector, we co-cultured the cells with G. lucidum in induction media that provides optimal conditions for T-DNA insertion for a period of 2 days. G. lucidum was then placed on a selective plate to isolate transformants [2].

References

1. Michielse, Caroline B., Paul J. J. Hooykaas, Cees A. M. J. J. Hondel, and Arthur F. J. Ram. "Agrobacterium-mediated Transformation as a Tool for Functional Genomics in Fungi." Current Genetics 48.1 (2005): 1-17.

2. Paz, Zahi, María D. García-Pedrajas, David L. Andrews, Steven J. Klosterman, Lourdes Baeza-Montañez, and Scott E. Gold. "One Step Construction of Agrobacterium-Recombination-ready-plasmids (OSCAR), an Efficient and Robust Tool for ATMT Based Gene Deletion Construction in Fungi." Fungal Genetics and Biology (2011): 677-684.