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JAM3

Products

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

Background

Junctional adhesion molecule 3 (JAM3), better known as JAM-C, is an immunoglobulin superfamily type I transmembrane glycoprotein. It is expressed at the intercellular junctions of endothelial and epithelial cells, where it has been shown to be involved in maintaining tight junction integrity and paracellular barrier function. JAM3 binds weakly homophilically, unlike its relatives JAM1 and JAM2 but has a major role in hetero-philic interactions. It serves as a key counter-receptor for the leukocyte β2-integrins Mac-1 (CD11b/CD18) and p150, mediating firm adhesion of neutrophils to platelets or endothelial cells during inflammatory responses. JAM3 has been discovered expressed on platelets and megakaryocytes, as well as soluble forms in serum and synovial fluid suggesting a role for JAM3 in immunity and tissue homeostasis.

Fig.1 ABCA1 in HIV-infected cells. (OA Literature)Fig.1 Heterophilic JAM-integrin interactions in trans.1

JAM3 Protein Function: Orchestrating Cell Adhesion and Inflammatory Cell Trafficking

These biological effects of JAM3 are linked to multiple overlapping physiological and pathological areas:

  • Leukocyte-Platelet Adhesion and Transmigration: JAM3 is a mediator of heterotypic cell-cell interactions between platelets and leukocytes (leukocyte-platelet adhesion and transmigration). Platelet-acquired JAM3 mediates neutrophil and monocyte adhesion through interaction with the β2 integrin Mac-1 to enable firm adhesion of the two leucocytes to vascular endothelium at sites of injury or inflammation, before transendothelial migration.
  • Tight Junction Integrity and Barrier Maintenance: JAM3 interacts with different PDZ-domain proteins such as ZO-1 and AF-6 that anchor the junctional complex to the actin cytoskeleton thereby modulating paracellular permeability, thus maintaining a selective fence between tissue compartments and blood.
  • Angiogenesis and Tissue Repair: Soluble JAM3 is shed from the cell surface under some circumstances and is involved in mediating angiogenesis. This proteolytic fragment may promote ECM-triggered endothelial cell migration and tube formation, suggesting that JAM3 function is mediated by additional signaling pathways acting in conjunction with its adhesion properties during processes such as wound healing and tissue remodeling.

JAM3 Membrane Protein Product

Our high-quality recombinant JAM3 membrane protein catalog supports vascular biology and inflammation research. The Ig-like extracellular domains, single-pass transmembrane topology, and glycosylation of JAM3 are important considerations for protein production and experimental design. We provide JAM3 constructs and preparations suitable for different research requirements, which may include full-length membrane-associated proteins, soluble extracellular domain (ECD) fragments, and other engineered constructs. These products can support ligand-binding studies, including research on JAM3 interactions with Mac-1, as well as antibody development and characterization and structural studies. Available formats, expression systems, glycosylation status, and functional characteristics should be determined according to the corresponding product information.

JAM3 Membrane Protein Product

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

JAM3 Stable Cell Line Product

To dissect JAM3-driven biology and assess target candidates, one needs reliable, reproducible cellular models. Our stable cell lines are used to express mouse and rat wild-type and disease-associated forms of JAM3; cell lines with modulated endogenous expression for loss-of-function studies. These systems are especially designed for use in high-throughput leukocyte adhesion assays, transmigration quantification, tight junction permeability studies and profiling of indicative inflammatory cytokines to ensure the experimental uniformity necessary to power multi-phase research projects.

JAM3 Stable Cell Line Product

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

JAM3 Recombinant Antibody Product

Our JAM3 high-affinity recombinant antibodies are fully characterized, optimized and validated in various applications. These antibodies, developed through advanced recombinant technologies, demonstrate superior specificity, sensitivity and batch-to-batch consistency over traditional polyclonal antibodies. JAM3 recombinant antibodies used in our validation of WB, ELISA, FCM, IF, ICC, IHC and IP allow for accurate detection and quantification of JAM3 in endothelial lysates, platelet preparations; synovial fluid; tissue sections.

JAM3 Recombinant Antibody Product

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

Product Features

  • High Purity & Activity: High purity and verified integrity for dependable downstream work.
  • Diverse Expression Systems: Choice of expression formats to match routine or specialized projects.
  • Species Reactivity: Products available for human, mouse, pig, and other species.
  • Validated Applications: Application-tested to deliver consistent signals across common lab workflows.
  • Exceptional Lot-to-Lot Consistency: Tight lot-to-lot control for reproducible performance.
  • Customization Options: Flexible customization of tags, labels, or packaging upon request.

Custom JAM3 Membrane Protein and Antibody Discovery Services

We also offer bespoke services for the extraction and purification of membrane protein and antibody discovery and development, beyond our catalog products:

  • Custom JAM3 Receptor Production: Tailored expression, purification, and characterization of challenging multi-domain receptor constructs.
  • Custom Antibody Development: From antigen design to antibody engineering (monoclonal, polyclonal, recombinant) for specific research applications.
  • Stable Cell Line Development: Generation of bespoke stable cell lines expressing your target of interest.
  • Functional Assay Development: Designing and executing assays to assess receptor activation and ligand.

Frequently Asked Questions (FAQ)

  1. Are the JAM3 products for clinical or diagnostic use?

    No, all JAM3 products and services are for research use only (RUO) and not intended for diagnostic, therapeutic, or clinical in-vitro procedures.

  2. What are the various JAM3 products that you provide?

    We sell recombinant full-length JAM3, soluble extracellular domain (ECD) and cytoplasmic tail variants of JAM3, stable cell lines expressing JAM3 or its integrin ligands, high-quality recombinant antibodies against JAM3 antibodies as well as design comprehensive custom services.

  3. What species variants are available?

    We have mouse, and rat JAM3 reagents in our catalog. Further orthologs or engineered mutants are available upon request.

  4. Can I order larger amounts or analog structures for high-throughput screening?

    Yes. With multiple tiers, we are prepared to meet academic and industrial scale-up needs at competitive prices. Visit our enquiry portal to provide us your estimate volume and timeline, and get a customized quote.

Reference
  1. Kummer, Daniel, and Klaus Ebnet. "Junctional adhesion molecules (JAMs): the JAM-integrin connection." Cells 7.4 (2018): 25. Under Open Access license CC BY 4.0, without modification. https://doi.org/10.3390/cells7040025
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