[Construction of shuttle expression vector and expression of thymosin alpha 1 in Synechococcus sp. PCC7942].
Zhang. Jun J; Qin. Yan Y; Ouyang. Qing Q; Xu. Hong H; Zhou. Ke Fu KF; Liu. Ren Hai RH; Lou. Shi Lin SL
Key Findings
- A shuttle vector (pPREUT) was created to carry the thymosin‑alpha‑1 gene into Synechococcus sp. PCC7942
- The vector successfully integrated into the cyanobacteria and was selected with kanamycin
- Heat‑shock induction (42 °C, 30 min) yielded UB‑Tα1 protein at ~7.5% of total cellular protein
Practical Outcomes
- The work demonstrates a way to produce thymosin‑alpha‑1 in bacteria, but it offers no direct guidance on dosing, safety, or how to use the peptide for health. Biohackers would need a separate purification and formulation process before any human application, making the study of limited practical relevance.
Summary
Scientists built a DNA tool to make the protein thymosin‑alpha‑1 inside a type of cyanobacteria and showed it can be produced at about 7.5% of the cell’s total protein after a heat‑shock step. This is a lab‑scale method for protein production, not a human‑use protocol.
Abstract
The shutter expression vector pPREUT was constructed from the plasmid pPRS-1 containing the endogenous small plasmid of Plectonema boryanum. The expression elements such as heat shock gene groESL promoter, foreign gene Ub-thymosin alpha 1, rbcS polyA terminator and Kanamycin resistance gene were all included. The shutter plasmid pPREUT was directly transferred into Synechococcus sp. PCC7942. The transformants were obtained through Kanamycin screening. Southern blotting analysis showed that the shutter plasmid have been transferred into Synechococcus sp. PCC7942. After induction by heat shock(42 degrees C) for 30 min, the foreign protein UB-T alpha 1 was expressed efficiently, which reached 7.5% of total amount protein.
Study Information
pubmed
2003