[Restriction map of E. coli shuttle plasmid (p# GTE5) with secretive function].

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Shuttle plasmids are crucial tools in molecular biology for gene cloning and expression across different host systems.
• Understanding the genetic makeup and restriction sites of plasmids like p# GTE5 is fundamental for their effective utilization in research.
• The E. coli RRI strain is a commonly used host for plasmid propagation and manipulation.

Purpose of the Study:

• To extract and characterize the shuttle plasmid p# GTE5 from E. coli RRI.
• To construct a detailed restriction map of the p# GTE5 plasmid.
• To provide a foundational resource for subsequent genetic engineering applications using this plasmid.

Main Methods:

• Alkali-lysozyme method was employed for the efficient extraction of shuttle plasmid (p# GTE5) DNA.
• Plasmid DNA molecular weight and size were determined (4.5 Md and 6.9 Kb, respectively).
• Complete digestion of plasmid DNA using single and double enzyme digests with five restriction endonucleases (EcoRI, BglII, pstI, PvuII, TaqI).

Main Results:

• The shuttle plasmid p# GTE5 was successfully extracted and its physical characteristics determined.
• A comprehensive restriction map for p# GTE5 was established based on the analysis of digestion fragments.
• The specific cleavage sites for EcoRI, BglII, pstI, PvuII, and TaqI were precisely located on the plasmid.

Conclusions:

• The restriction map of shuttle plasmid p# GTE5 provides essential information for its use in molecular cloning and genetic manipulation.
• This characterized plasmid is suitable for further studies requiring precise genetic modifications and analyses.
• The established map serves as a valuable reference for researchers working with p# GTE5 in various biological systems.