Recombinant Pseudomonas entomophila UPF0114 protein PSEEN0819 (PSEEN0819) is a protein derived from the bacterium Pseudomonas entomophila. Proteins are fundamental components of biological systems, crucial in various biological processes . The primary structure of a protein refers to its amino acid sequence, which dictates its shape and function1.
Proteins have four levels of structural organization: primary, secondary, tertiary, and quaternary .
Pseudomonas entomophila is a bacterium known for its insecticidal properties . Proteins such as PSEEN0819, derived from P. entomophila, may play a role in its interaction with insects.
Recombinant proteins are produced using genetic engineering techniques, where the gene encoding the protein of interest is inserted into a host organism (e.g., E. coli) that then produces the protein . Recombinant PSEEN0819 protein is often used in research and development.
Recombinant PSEEN0819 has uses in:
ELISA Assays: It can be employed as an antigen in Enzyme-Linked Immunosorbent Assays (ELISA) . ELISA is a biochemical technique used to detect the presence of an antibody or an antigen in a sample.
Presenilins are key components of the γ-secretase complex, an intramembrane protease crucial in various cellular processes .
Structure of Presenilins: Presenilins, such as PSEN1 and PSEN2, are integral membrane proteins with multiple transmembrane domains .
Function in γ-Secretase Activity: Presenilins are catalytic subunits of γ-secretase, which cleaves other proteins within their transmembrane domains . Mutations in presenilin genes can affect γ-secretase activity and are implicated in diseases such as Alzheimer's .
The dystrophin complex is vital in stabilizing the plasma membrane of muscle cells . Dystrophin, a key component, has four main functional domains:
KEGG: pen:PSEEN0819
STRING: 384676.PSEEN0819
How should recombinant PSEEN0819 be properly stored and handled in laboratory settings?
For optimal results when working with recombinant PSEEN0819, researchers should follow these evidence-based protocols:
| Storage Parameter | Recommended Condition | Notes |
|---|---|---|
| Long-term storage | -20°C to -80°C | Aliquoting necessary for multiple use |
| Working aliquots | 4°C | Stable for up to one week |
| Buffer composition | Tris/PBS-based, 6% Trehalose, pH 8.0 | Optimized for stability |
| Reconstitution | Deionized sterile water (0.1-1.0 mg/mL) | Centrifuge vial before opening |
| Cryoprotectant | 5-50% glycerol (final concentration) | 50% is standard reference |
Repeated freeze-thaw cycles should be strictly avoided as they significantly reduce protein activity . For experimental reproducibility, consistent handling practices should be maintained across studies.
What expression systems are used for producing recombinant PSEEN0819?
Recombinant PSEEN0819 is predominantly produced using E. coli expression systems. The standard methodology involves:
Cloning the full-length gene (nucleotides encoding amino acids 1-162) into an expression vector
Adding an N-terminal His-tag for purification purposes
Transforming the construct into E. coli expression strains
Inducing protein expression under optimized conditions
Purifying via affinity chromatography targeting the His-tag
Confirming purity (>90%) using SDS-PAGE analysis
This approach yields recombinant protein suitable for functional studies, antibody production, and structural analyses. Similar methodologies are employed for homologous proteins from P. putida (PputGB1_0714) .