Recombinant Human GPCPD1 Protein: Research Guide & Protocol

Recombinant Human GPCPD1 Protein is a research-grade enzyme tool designed to support investigations into glycerophosphocholine metabolism, lipid signaling, and related biochemical pathways.

Product Name

Recombinant Human GPCPD1 Protein

SKU

rp375085

Protein Origin

Human (Homo sapiens)

Protein Type

Recombinant, enzyme (glycerophosphocholine phosphodiesterase)

Primary Application

Biochemical assays, enzyme activity studies, choline metabolism research

Recommended Storage

-80°C for long-term storage; avoid repeated freeze-thaw cycles

Overview of GPCPD1 and Its Biological Significance

GPCPD1 (Glycerophosphocholine Phosphodiesterase 1), also known as glycerophosphocholine cholinephosphodiesterase, is an enzyme responsible for the hydrolysis of glycerophosphocholine (GPC) to glycerol-3-phosphate and choline. This reaction places GPCPD1 at a critical junction in phospholipid catabolism and choline recycling pathways.

Choline is an essential nutrient involved in membrane biosynthesis, methyl-group donation, and neurotransmitter synthesis. By regulating the availability of choline derived from membrane phospholipid turnover, GPCPD1 plays a role in cellular lipid homeostasis and has been implicated in metabolic diseases, cancer cell metabolism, and neurological research contexts.

Recombinant Human GPCPD1 Protein (rp375085) from Aladdin Scientific provides researchers with a well-defined, human-sequence enzyme for in vitro mechanistic and biochemical studies, enabling reproducible results across experimental systems.

Reconstitution and Handling Protocol

Proper reconstitution and handling of Recombinant Human GPCPD1 Protein are essential to preserve enzymatic activity and ensure data reliability. Follow the steps below:

1. Equilibration: Allow the vial to equilibrate to room temperature for 5–10 minutes before opening. Do not expose the protein to temperatures above room temperature for extended periods.
2. Reconstitution: Reconstitute lyophilized protein in sterile, deionized water or the recommended buffer (e.g., phosphate-buffered saline, pH 7.4) to the desired concentration. Gently pipette to mix; avoid vortexing, which can denature the protein.
3. Concentration: Refer to the product-specific datasheet (absea#PP-8818) for the exact recommended reconstitution volume and working concentration ranges.
4. Centrifugation: After reconstitution, briefly centrifuge the vial (e.g., 5,000 × g for 30 seconds) to collect any residual material from the walls and cap.
5. Carrier Protein: For dilute working solutions, consider adding a carrier protein such as BSA (0.1–0.5% w/v) to minimize adsorption losses to tube surfaces.

Always work on ice when handling reconstituted protein to maintain activity.

Storage, Stability, and Quality Control

Maintaining the integrity of Recombinant Human GPCPD1 Protein requires adherence to appropriate storage conditions:

• Short-term storage (up to 1 week): Store at 4°C in a suitable buffer with carrier protein if required.
• Long-term storage: Aliquot the reconstituted protein into single-use volumes and store at -80°C. Aliquoting prevents activity loss from repeated freeze-thaw cycles.
• Freeze-thaw cycles: Limit to a maximum of 2–3 cycles; each additional cycle may result in significant loss of enzymatic activity and protein aggregation.
• Lyophilized form: Store unopened vials at -20°C or -80°C as specified on the product datasheet. Lyophilized protein is generally stable for up to 12 months under recommended conditions.

Quality control for rp375085 is performed to verify identity, purity, and biological activity prior to release. Researchers should confirm activity in their specific assay system upon receipt of a new lot.

Applications and Experimental Considerations

Recombinant Human GPCPD1 Protein (rp375085) is suitable for a range of biochemical and cell biology applications:

• Enzyme activity assays: Use GPCPD1 as a positive control or active enzyme component in GPC hydrolysis assays to quantify choline release using colorimetric or fluorometric detection methods.
• Inhibitor screening: Employ the recombinant protein in high-throughput or targeted screens for small-molecule inhibitors of GPCPD1 activity, relevant to metabolic disease and oncology research.
• Protein–protein interaction studies: Use as bait or prey in pull-down assays to identify GPCPD1 binding partners within the choline metabolism network.
• Western blot standard: Serve as a molecular weight marker and positive control for anti-GPCPD1 antibody validation.
• Structural and biophysical studies: Support crystallography, dynamic light scattering, or other biophysical characterization studies of the GPCPD1 enzyme.

Important considerations: Optimize protein concentration, buffer composition, pH, and incubation temperature empirically for each application. Divalent cation requirements (e.g., Mg²⁺ or Mn²⁺) should be evaluated, as phosphodiesterase family enzymes commonly require metal cofactors for full activity.

Frequently asked questions

What is the recommended reconstitution buffer for Recombinant Human GPCPD1 Protein?

Sterile deionized water or phosphate-buffered saline (PBS, pH 7.4) is generally recommended for reconstitution. Always consult the product-specific datasheet (absea#PP-8818) for the exact buffer composition, volume, and any supplemental additives specified for rp375085.

How many freeze-thaw cycles can Recombinant Human GPCPD1 Protein tolerate without significant activity loss?

It is recommended to limit freeze-thaw cycles to no more than 2–3 times. To minimize activity loss, aliquot the reconstituted protein into single-use volumes before storing at -80°C, ensuring each aliquot is only thawed once for use.

Can Recombinant Human GPCPD1 Protein (rp375085) be used as a positive control in Western blot experiments?

Yes, Recombinant Human GPCPD1 Protein is suitable for use as a positive control and molecular weight reference in Western blot assays for anti-GPCPD1 antibody validation. Ensure the loading amount is optimized empirically based on antibody sensitivity and detection system used.

Does GPCPD1 enzyme activity require metal cofactors?

Phosphodiesterase family enzymes, including GPCPD1, commonly require divalent metal cations such as Mg²⁺ or Mn²⁺ as cofactors for full enzymatic activity. Researchers should empirically evaluate and optimize cofactor concentrations in their specific assay buffers.

What quality control tests are performed on rp375085 before release?

Recombinant proteins from Aladdin Scientific undergo quality control testing to verify protein identity, purity (typically assessed by SDS-PAGE), and biological activity before release. Specific QC criteria for rp375085 are detailed in the product datasheet (absea#PP-8818). Researchers are advised to confirm activity in their own assay system upon receipt of each new lot.

References

1. Aladdin Scientific. Recombinant Human GPCPD1 Protein, SKU rp375085. Product Datasheet absea#PP-8818. Aladdin Scientific.
2. Gallego-Garcia A, et al. Biochemical characterization of glycerophosphocholine metabolism and phosphodiesterase enzyme families. [General reference — specific citation to be confirmed.]
3. Vance DE. Phospholipid methylation in mammals: from biochemistry to physiological function. Biochim Biophys Acta. 2014. [General reference for choline metabolism pathway — specific volume, pages, and PMID to be confirmed.]

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.