pGEM®-T Vector Systems

The pGEM®-T Vector Systems are convenient systems to clone PCR products. The pGEM®-T Vector is prepared by cutting the pGEM®-5Zf(+) Vector with EcoRV and adding a 3´ terminal thymidine to both ends. These single 3´-T overhangs at the insertion site greatly improve the efficiency of ligation of a PCR product into the plasmid by preventing recircularization of the vector and providing a compatible overhang for ligation of PCR products generated by thermostable polymerases that add a single deoxyadenosine, in a template-independent fashion, to the 3´-ends of amplified fragments.

The multip...

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The pGEM®-T Vector Systems are convenient systems to clone PCR products. The pGEM®-T Vector is prepared by cutting the pGEM®-5Zf(+) Vector with EcoRV and adding a 3´ terminal thymidine to both ends. These single 3´-T overhangs at the insertion site greatly improve the efficiency of ligation of a PCR product into the plasmid by preventing recircularization of the vector and providing a compatible overhang for ligation of PCR products generated by thermostable polymerases that add a single deoxyadenosine, in a template-independent fashion, to the 3´-ends of amplified fragments.

The multiple cloning site is flanked by recognition sites for the restriction enzyme BstZI, allowing release of the insert by a single-enzyme digestion. Alternatively, a double digestion may be used to release the insert from the vector. The pGEM®-T Vector System II contains JM109 Competent Cells in addition to all of the pGEM®-T Vector System I components.

Features - Benefits

• Rapid Ligation: The 2X Rapid Ligation Buffer provided allows reactions to be completed in 1 hour at room temperature.
• Blue/White Screening: T7 and SP6 RNA polymerase promoters flank a multiple cloning region within the α-peptide coding region for β-galactosidase. Insertional inactivation of the α-peptide allows recombinant clones to be directly identified by color screening on indicator plates.
• f1 Origin of Replication: Allows preparation of single-stranded DNA.

Applications

For more information, see the Cloning and PCR chapters of the Protocols & Applications Guide.

References

1. Mezei, L.M. and Storts, D.R. (1994) In: PCR Technology: Current Innovations, Griffin, H.G. and Griffin, A.M., eds., CRC Press, Boca Raton, FL, 21.
2. Robles, J. and Doers, M. (1994) Promega Notes 45, 19–20.
3. Clark, J.M. (1988) Nucl. Acids Res. 16, 9677–86.
4. Newton, C.R. and Graham, A. (1994) In: PCR, BIOS Scientific Publishers, Ltd., Oxford, UK, 13.

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