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TPSAB1

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All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.

Background

Tryptase alpha/beta 1 (TPSAB1) is a mast cell/basophil granule-stored serine protease encoded by TPSAB1 gene, co-expressed as alpha and beta isoforms to assemble enzymatically active heterotetramers stabilized by intracellular heparin proteoglycans. Distinguished from other granule proteases with narrow substrate range, TPSAB1 tetramers cleave PAR2 receptors, ECM fibronectin and mechanosensory EMR2 to drive multi-organ allergic inflammatory cascades upon mast cell degranulation. Under healthy resting immunity, minimal constitutive TPSAB1 release maintains low-level tissue remodeling surveillance; allergen or mechanical stimulation triggers massive mast cell degranulation, discharging abundant TPSAB1 into interstitial fluid to induce bronchoconstriction vascular leakage and cutaneous urticaria. Germline TPSAB1 copy number amplification elevates basal circulating tryptase levels and causes hereditary alpha tryptasemia featuring chronic multi-system hypersensitivity symptoms. Its mast cell-restricted inflammatory protease function cannot be fully compensated by other immune proteases; pharmacological TPSAB1 inhibition alleviates severe asthma and urticaria pathology, making TPSAB1 an irreplaceable core research target for mast cell immunology and anti-allergy therapeutic screening.

TPSAB executes granule-resident serine protease function packaged within mast cell secretory vesicles, forming heparin-stabilized α/β heterotetramers that retain sustained catalytic activity post extracellular release. Its broad substrate repertoire for inflammatory GPCR and matrix proteins clearly separates TPSAB1 from granulocyte-specific proteases, establishing it as a master amplifier of mast cell-mediated allergy. TPSAB1-mediated substrate cleavage links mast cell degranulation to tissue inflammatory damage, balancing baseline tissue repair and pathological hypersensitivity according to stimulus intensity. TPSAB1 participates in asthma pathogenesis chronic urticaria and systemic mastocytosis progression. Loss of functional TPSAB1 drastically reduces allergic tissue inflammatory infiltration. Therefore, TPSAB1 represents a pivotal research target for mast cell protease study and anti-allergy therapeutic exploration.

Fig. 1 TPSAB1 tryptase gene cluster genomic structure, targeted sequencing bioinformatics and machine learning genotyping diagnostic pathway schematic. (OA Literature)Fig. 1 Genomic map of 16p13.3 tryptase gene cluster and sequencing-based machine learning workflow for TPSAB1 genotyping.1

TPSAB1 Protein Function: Core Roles in Mast Cell Proteolysis and Allergic Inflammation Tuning

The biological functions of TPSAB1 tetrameric tryptase are fully focused on extracellular PAR2/EMR2 receptor cleavage and downstream allergic signal amplification:

  • Heparin-stabilized tetramer assembly: stable α/β heterodimer assembly can be completed in the endocrine granules of mast cells, and the spatial conformation of protease can be maintained by the stable support of heparin, ensuring its storage stability and subsequent activation and release ability, which is the structural basis for enzyme activity.
  • Shear activation of inflammatory receptors: it can specifically shear PAR2 and EMR2 receptors on the cell membrane surface, amplify the body's hypersensitivity signal transmission by regulating the activation state of membrane receptors, continuously drive the local inflammatory cascade reaction, and strengthen allergic and inflammatory pathological responses.
  • Regulation of extracellular matrix remodeling: it can degrade fibronectin matrix structure in interstitial tissue, destroy the integrity of local matrix barrier, create conditions for tissue infiltration and migration of inflammatory immune cells, and effectively enlarge the scope of local inflammatory damage.
  • Regulation function of allergic reaction: With the degranulation of mast cells, it releases and activates downstream pathological effects, induces bronchial contraction and abnormal increase of vascular permeability, and mediates the occurrence and progress of immediate allergic reaction, which is the key effector molecule of allergic diseases.
  • Pathological characteristics of diseases: the amplification of copy number of TPSAB1 gene in germ cells can directly induce hereditary α-tryptasemia and mediate severe mast cell dysfunction, which is the core pathogenic marker and research target of mast cell-related genetic diseases and severe allergic diseases.

TPSAB1 Protein Product

Creative Biolabs offers high-quality TPSAB1 proteins through optimized mammalian secretion systems, including heparin-stabilized tetramer and isolated monomer protease domain variants. These products retain native PAR2/EMR2 substrate cleavage activity, suitable for allergic inflammation and mastocytosis inhibitor screening assays. All TPSAB1 proteins undergo strict quality control to ensure consistent performance and reliable application across immunology research platforms.

TPSAB1 Protein Product

Not finding the protein product you need? Contact us to start your one-stop custom service!

TPSAB1 Stable Cell Line Product

Creative Biolabs provides custom-engineered TPSAB1 stable cell lines, including mast cell-like overexpression and blank empty vector control models. These cell lines are optimized for granule protease profiling and allergic signal functional analysis. Each cell line undergoes stringent validation to ensure stable expression profiles during long-term hematopoietic cell culture, and can be widely deployed for anti-asthma compound screening workflows.

TPSAB1 Stable Cell Line Product

Not finding the stable cell line product you need? Contact us to start your one-stop custom service!

TPSAB1 Recombinant Antibody Product

High-specificity recombinant antibodies targeting TPSAB1 are developed via advanced antibody engineering technologies, with no cross-reactivity with other granulocyte serine proteases. These antibodies are validated for mast cell granule localization detection and skin/lung tissue expression profiling, and can be combined with PAR2 marker reagents to analyze inflammatory protease signaling complexes in immune cell models.

TPSAB1 Recombinant Antibody Product

Not finding the recombinant antibody product you need? Contact us to start your one-stop custom service!

Product Features

  • Native Tetramer Proteolytic Activity: Preserves intact PAR2/EMR2 cleavage capacity for allergy research.
  • TPSAB1 Specificity: Eliminates non-specific cross-recognition of other leukocyte granule proteases.
  • Allergology Compatibility: Optimized reagent series for asthma and hereditary tryptasemia screening workflows.
  • Comprehensive Customization Support: Facilitates end-to-end development of customized proteins, antibodies and stable cell lines to address mast cell research demands.

Custom TPSAB1 Research Services

Beyond catalog products, Creative Biolabs offers specialized custom services for TPSAB1 research:

  • Custom TPSAB1 Protein Production: Tailored mutant and fluorescent-tagged TPSAB constructs for receptor substrate kinetic binding analysis.
  • Custom Antibody Development: Generation of highly specific TPSAB1 antibodies for mast cell granule tissue immunostaining.
  • Stable Cell Line Engineering: Construction of customized TPSAB1-overexpressing mast cell in vitro models.
  • Functional Assay Development: Custom design of PAR2 cleavage and allergic signaling quantitative detection workflows.

Frequently Asked Questions (FAQ)

  1. What is the primary function of TPSAB1?

    A1: TPSAB1 is mast cell tetrameric serine protease that cleaves PAR2/EMR2 to drive allergic inflammatory responses.

  2. Why is TPSAB1 a significant research target?

    A2: TPSAB1 is the central effector of mast cell allergy, gene copy variants cause hereditary tryptasemia.

  3. Are Creative Biolabs' TPSAB1 products suitable for clinical use?

    A3: No, all TPSAB1 products and services are strictly for research use only, not intended for clinical allergy testing.

  4. What types of TPSAB1 products does Creative Biolabs offer?

    A4: Offerings include tetrameric TPSAB1 proteases, isoform-specific detection antibodies and custom stable cell lines for mast cell research.

  5. How are TPSAB1 proteins validated for activity?

    A5: TPSAB1 proteins are validated via PAR2 receptor cleavage proteolytic functional testing.

Reference
  1. Li, Olga, et al. "A targeted amplicon next-generation sequencing assay for tryptase genotyping to support personalized therapy in mast cell-related disorders." Plos one 19.2 (2024): e0291947. Under Open Access license CC BY 4.0, without modification. https://doi.org/10.1371/journal.pone.0291947
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