Background and Biological Significance of GRIN2C

GRIN2C (Glutamate Ionotropic Receptor NMDA Type Subunit 2C), also known as GluN2C or NR2C, is a regulatory subunit of N-methyl-D-aspartate (NMDA) receptors — a class of ligand-gated ion channels critical for synaptic transmission, plasticity, and memory formation in the central nervous system. NMDA receptors are tetrameric complexes typically composed of two obligatory GluN1 subunits and two regulatory GluN2 subunits (GluN2A–D) or GluN3 subunits. The GluN2C subunit is encoded by the GRIN2C gene and is predominantly expressed in cerebellar granule cells and certain thalamic nuclei, where it confers distinct biophysical properties, including reduced sensitivity to Mg²⁺ block and lower single-channel conductance compared to GluN2A- or GluN2B-containing receptors.

Research into GRIN2C is relevant to understanding cerebellar circuit function, neurological disorders including schizophrenia, epilepsy, and cognitive impairment. Recombinant Human GRIN2C Protein (rp368059) from Aladdin Scientific enables researchers to perform in vitro biochemical characterization, protein–protein interaction studies, and antibody specificity validation without dependence on native tissue sources.

Materials and Reagents Required

Before beginning the protocol, ensure the following materials are available:

• Recombinant Human GRIN2C Protein (Aladdin Scientific, rp368059)
• Sterile, nuclease-free deionized water or reconstitution buffer as specified on the product datasheet
• Phosphate-buffered saline (PBS), pH 7.4, or appropriate assay buffer
• Protein low-binding microcentrifuge tubes (1.5 mL)
• Calibrated micropipettes and sterile tips
• Benchtop microcentrifuge
• -20°C and/or -80°C freezer with consistent temperature maintenance
• Bradford or BCA protein quantification kit (for concentration verification)
• SDS-PAGE gel system and Coomassie or silver staining reagents (for purity assessment)
• Appropriate downstream assay reagents (e.g., ELISA kit, pull-down reagents, or binding assay components)

Note: Always consult the product-specific Certificate of Analysis (CoA) and datasheet supplied with rp368059 for formulation details, confirmed purity, and any lot-specific instructions.

Step-by-Step Reconstitution and Storage Protocol

Follow these steps carefully to ensure maximum protein activity and stability:

1. Equilibration: Remove the vial of Recombinant Human GRIN2C Protein (rp368059) from the freezer and allow it to equilibrate to room temperature for 5–10 minutes before opening. This minimizes condensation and potential protein aggregation.
2. Reconstitution: Add the volume of sterile reconstitution buffer (typically deionized water, PBS pH 7.4, or buffer specified in the datasheet) recommended in the product CoA. Gently pipette up and down; do not vortex, as shear forces may denature the protein.
3. Centrifugation: Briefly centrifuge the reconstituted solution at low speed (e.g., 300–500 × g for 1 minute) to collect any material from the tube walls and ensure homogeneous solution.
4. Concentration Verification: Measure protein concentration using a BCA or Bradford assay against a BSA standard curve, and compare to the stated concentration on the CoA.
5. Aliquoting: Divide the reconstituted protein into single-use aliquots using low-binding tubes. This prevents activity loss from repeated freeze-thaw cycles. Recommended aliquot volume is sufficient for one experimental session.
6. Storage: Store aliquots at -80°C for long-term storage (up to 6–12 months, per datasheet guidance). For short-term use within 1–2 weeks, storage at -20°C is acceptable. Avoid storing at 4°C for extended periods. Do not refreeze thawed aliquots.
7. Thawing: Thaw aliquots on ice immediately before use. Do not use a water bath at elevated temperature, as this may accelerate degradation.

Review flag: Specific reconstitution buffer composition, exact storage duration, and concentration values should be confirmed against the official rp368059 product datasheet and CoA provided by Aladdin Scientific.

Quality Control and Downstream Application Guidelines

Quality Control Checks:

• Purity Assessment: Run an SDS-PAGE gel with the reconstituted protein and stain with Coomassie Brilliant Blue. A predominant band at the expected molecular weight of the GRIN2C protein or the expressed domain/fragment confirms purity. Refer to the CoA for the expected molecular weight of rp368059.
• Western Blot Validation: Use an anti-GRIN2C antibody (validated for recombinant protein detection) to confirm identity by Western blot.
• Functional Verification: Where applicable, perform a binding assay or ELISA to confirm protein activity, particularly if the protein is intended for interaction studies.

Recommended Downstream Applications:

• In vitro binding and pull-down assays: Recombinant Human GRIN2C Protein can be used to study protein–protein interactions relevant to NMDA receptor complex assembly.
• ELISA and immunoassay development: The purified recombinant protein serves as a standard antigen for developing or validating ELISA-based detection of GRIN2C.
• Antibody specificity validation: Use the protein as a positive control antigen to confirm antibody selectivity in Western blot, immunoprecipitation, or immunofluorescence experiments.
• Structural and biophysical studies: Suitable for use as a reference protein in biophysical characterization techniques such as SPR (surface plasmon resonance) or MST (microscale thermophoresis).

Review flag: Specific confirmed applications, activity data, and binding constants are not provided in the source material and should be validated by the user or confirmed with Aladdin Scientific technical support.

Troubleshooting Common Issues

Use the following troubleshooting guide when working with Recombinant Human GRIN2C Protein (rp368059):