PSMA3 Mouse mAb: Selection, Application & Usage Guidelines

PSMA3 Mouse mAb is a monoclonal antibody raised in mouse against the PSMA3 antigen (Proteasome Subunit Alpha Type-3), designed to support reliable detection of this essential proteasome component across a range of standard immunological assay formats.

Product Name

PSMA3 Mouse mAb

SKU

Ab349223

Host Species

Mouse

Antibody Type

Monoclonal Antibody (mAb)

Target Protein

PSMA3 (Proteasome Subunit Alpha Type-3)

Reference Clone

Absea #KC-8420

Target Biology: PSMA3 and the 26S Proteasome

PSMA3, also known as Proteasome Subunit Alpha Type-3, is a constituent of the 20S core particle of the 26S proteasome, a large multi-catalytic protease complex responsible for the ATP-dependent degradation of ubiquitinated proteins. The 20S core is composed of four stacked heptameric rings—two outer alpha rings and two inner beta rings—with PSMA3 occupying a defined position in the alpha ring.

The ubiquitin-proteasome system (UPS) governs a broad range of cellular processes including cell cycle progression, apoptosis, antigen presentation, and the stress response. Dysregulation of proteasome activity has been implicated in cancer, neurodegenerative diseases, and inflammatory conditions, making proteasome subunits such as PSMA3 relevant targets for both basic research and translational studies.

Research-grade antibodies targeting PSMA3 enable investigators to assess proteasome subunit expression levels, examine subcellular localization, and study protein complex assembly dynamics under various experimental conditions.

Recommended Applications and Assay Formats

PSMA3 Mouse mAb (Ab349223) is intended for use in standard immunological assay formats commonly employed in protein biology research. Users should validate the antibody for each specific application and sample type in their own laboratory prior to use in critical experiments. Typical applications for anti-PSMA3 monoclonal antibodies of this class may include:

• Western Blot (WB): Detection of PSMA3 in cell or tissue lysates under denaturing conditions. The expected molecular weight of PSMA3 is approximately 28–30 kDa; verify against the supplier's datasheet.
• Immunohistochemistry (IHC): Localization of PSMA3 in formalin-fixed paraffin-embedded (FFPE) or frozen tissue sections. Antigen retrieval optimization may be required.
• Immunofluorescence (IF): Visualization of PSMA3 subcellular distribution in cultured cells; proteasomes are predominantly cytoplasmic but can shuttle to the nucleus.
• Immunoprecipitation (IP): Enrichment of PSMA3-containing complexes from cell lysates for downstream co-IP or mass spectrometry studies.

Always consult the current product datasheet for validated applications, recommended dilutions, and positive control recommendations specific to lot Ab349223.

Sample Preparation and Protocol Guidance

Consistent sample preparation is critical for reproducible results with any monoclonal antibody. The following general guidelines apply to PSMA3 Mouse mAb use:

Cell and Tissue Lysis (for WB and IP)

Lyse cells in an appropriate buffer (e.g., RIPA or NP-40 lysis buffer) supplemented with protease inhibitors to prevent PSMA3 degradation during processing. Quantify total protein by BCA or Bradford assay and load equivalent amounts per lane (typically 20–50 µg for WB). Boil samples in reducing SDS-PAGE sample buffer prior to gel electrophoresis.

Antigen Retrieval (for IHC)

For FFPE sections, heat-induced epitope retrieval (HIER) using citrate buffer (pH 6.0) or EDTA-based buffer (pH 9.0) is commonly employed. Optimize retrieval conditions empirically if background or signal is suboptimal.

Blocking and Antibody Incubation

Block non-specific binding with 5% normal serum (matched to secondary antibody host species) or 5% BSA in TBS-T for 1 hour at room temperature. Incubate with PSMA3 Mouse mAb at the recommended dilution (refer to the current datasheet for Ab349223) overnight at 4°C. Wash thoroughly before applying a species-appropriate HRP- or fluorophore-conjugated secondary antibody.

All protocol parameters should be optimized for each specific experimental system and sample matrix.

Storage, Handling, and Quality Considerations

Proper storage and handling of PSMA3 Mouse mAb are essential to preserve antibody activity and ensure data integrity:

• Storage Temperature: Store at –20°C for long-term storage. Avoid repeated freeze-thaw cycles, which can lead to aggregation and loss of binding activity. Aliquot upon first thaw if the entire volume will not be used within a short period.
• Short-Term Storage: Working stocks may be kept at 4°C for up to 4 weeks when stored in a stabilizing buffer; consult the product datasheet for specific formulation details.
• Carrier Protein: Many antibody formulations contain BSA and/or glycerol as stabilizers. Be aware of these additives if downstream applications are sensitive to carrier proteins (e.g., certain IP-mass spectrometry workflows).
• Sterility: If the antibody will be used in cell-based assays requiring sterile conditions, filter-sterilize through a 0.2 µm membrane.
• Lot Consistency: Each lot of Ab349223 is manufactured and quality-controlled individually. Record lot numbers in experimental notebooks and verify performance with an appropriate positive control tissue or cell line known to express PSMA3.

Contact Aladdin Scientific technical support for lot-specific certificate of analysis (CoA) data or additional technical guidance.

Troubleshooting Common Issues

Even with validated antibodies, assay optimization may be required. The following table summarizes common issues and suggested corrective actions for PSMA3 Mouse mAb assays:

• No Signal / Weak Signal: Verify that the target sample expresses PSMA3 (use a positive control cell line). Check antibody concentration and dilution. Ensure secondary antibody is compatible with mouse primary IgG. Confirm adequate antigen retrieval in IHC.
• High Background: Increase blocking time or concentration. Increase wash stringency (number of washes or detergent concentration). Reduce primary or secondary antibody concentration. For WB, ensure complete blocking of membrane before antibody incubation.
• Multiple Non-Specific Bands (WB): Optimize SDS-PAGE percentage for the ~28–30 kDa target. Ensure complete denaturation of samples. Review lysis buffer composition and protease inhibitor adequacy.
• Inconsistent Results Between Experiments: Standardize protein quantification method. Record and fix incubation times and temperatures. Use the same lot of antibody or re-validate upon lot change. Check refrigerator/freezer temperatures regularly.

If problems persist after systematic troubleshooting, contact Aladdin Scientific technical support with your experimental details for personalized assistance.

Frequently asked questions

What is PSMA3 and why is it an important research target?

PSMA3 (Proteasome Subunit Alpha Type-3) is a structural component of the 20S core particle of the 26S proteasome, the primary machinery for regulated intracellular protein degradation via the ubiquitin-proteasome system. Its relevance spans cancer biology, neurodegenerative disease research, and immunology, making antibodies against PSMA3 valuable tools for studying proteasome assembly and function.

Which applications is PSMA3 Mouse mAb (Ab349223) suitable for?

PSMA3 Mouse mAb is designed for use in standard immunoassay formats including Western Blot, Immunohistochemistry, Immunofluorescence, and Immunoprecipitation. Users should consult the current product datasheet for confirmed validated applications and recommended working dilutions, and independently validate the antibody for each specific application and sample type.

How should PSMA3 Mouse mAb be stored to maintain optimal performance?

Store PSMA3 Mouse mAb at –20°C for long-term use. Avoid repeated freeze-thaw cycles by aliquoting the antibody upon first thaw. For short-term use (up to approximately 4 weeks), working stocks may be kept at 4°C in stabilizing buffer. Always refer to the product datasheet for lot-specific storage instructions.

What positive control should I use to validate PSMA3 Mouse mAb in my assay?

A positive control cell line or tissue known to constitutively express PSMA3 should be included in every assay. Because PSMA3 is a ubiquitously expressed proteasome subunit, many commonly used human cell lines (such as HeLa or HEK293) can serve as positive controls for Western Blot and Immunofluorescence. Verify expression levels in your specific model system using published literature or protein databases.

What secondary antibody should be used with PSMA3 Mouse mAb?

Since PSMA3 Mouse mAb is produced in mouse, an anti-mouse IgG secondary antibody is required. Choose a secondary antibody conjugated to HRP (for colorimetric or chemiluminescent detection), alkaline phosphatase, or an appropriate fluorophore depending on your detection platform. Ensure the secondary antibody is raised in a species other than mouse to minimize cross-reactivity with the sample.

References

1. Coux O, Tanaka K, Goldberg AL. Structure and functions of the 20S and 26S proteasomes. Annu Rev Biochem. 1996;65:801-847.
2. Glickman MH, Ciechanover A. The ubiquitin-proteasome proteolytic pathway: destruction for the sake of construction. Physiol Rev. 2002;82(2):373-428.
3. Absea Biotechnology. Product Reference KC-8420: PSMA3 Mouse Monoclonal Antibody. [Manufacturer's technical documentation].

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