Human Matriptase/ST14 Catalytic Domain Antibody

Catalog # Availability Size / Price Qty
Detection of Matriptase/ST14 in PC‑3 Human Cell Line by Flow Cytometry.
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Product Details
Citations (4)
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Human Matriptase/ST14 Catalytic Domain Antibody Summary

Species Reactivity
Detects human Matriptase/ST14 Catalytic Domain in direct ELISAs and Western blots.
Monoclonal Mouse IgG1 Clone # 416802
Protein A or G purified from hybridoma culture supernatant
E. coli-derived recombinant human Matriptase/ST14 Catalytic Domain
Accession # Q9Y5Y6
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
1 µg/mL
Recombinant Human Matriptase/ST14 Catalytic Domain (Catalog # 3946-SE)
Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
Intracellular Staining by Flow Cytometry
2.5 µg/106 cells
See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Intracellular Staining by Flow Cytometry Detection of Matriptase/ST14 antibody in PC‑3 Human Cell Line antibody by Flow Cytometry. View Larger

Detection of Matriptase/ST14 in PC‑3 Human Cell Line by Flow Cytometry. PC-3 human prostate cancer cell line was stained with Mouse Anti-Human Matriptase/ST14 Catalytic Domain Monoclonal Antibody (Catalog # MAB3946, filled histogram) or isotype control antibody (Catalog # MAB002, open histogram), followed by Phycoerythrin-conjugated Anti-Mouse IgG F(ab')2Secondary Antibody (Catalog # F0102B). To facilitate intracellular staining, cells were fixed with paraformaldehyde and permeabilized with saponin.

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Preparation and Storage

Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Matriptase/ST14

Human Matriptase, encoded by the ST14 (suppression of tumorogenicity 14) gene, is also known as tumor associated differentially expressed gene 15 protein/TADG‑15), epithin, and membrane-type serine protease 1/MT-SP1 (1). Predicted to have a significant role in tumor biology, Matriptase may be a novel target for anti-cancer therapy (2). However, expressed in most human epithelia, Matriptase is also important in several physiological processes (1). For example, it activates prostasin to initiate a protease cascade that is essential for epidermal differentiation (3), and it converts a single-chain IGFBP-rp1 into the two-chain form (4). Matriptase is a type II transmembrane serine protease with a complex modular structure (1). The 855 amino acid (aa) sequence of human Matriptase consists of a cytoplasmic tail (aa 1‑55), a transmembrane domain (aa 56‑76), and an extracellular portion (aa 77‑855). The latter contains the following domains: SEA (aa 86‑201), two CUBs (aa 214‑334 and 340‑447), four LDLRAs (aa 452‑486, 487‑523, 524‑560, and 566‑603), and a serine protease (aa 615‑855). The physiological activation of the single-chain zymogen requires the cleavage at the SEA domain within the ER or Golgi, association with HAI-1, which facilitates the transport of the protease to the cell surface, and auto-cleavage at QAR-V(615)VGG (1). The activated Matriptase is inhibited by HAI-1, and the resulting HAI-1 complex can be shed from the cell surface (1).

  1. List, K. et al. (2006) Mol. Med. 12:1.
  2. Uhland, K. (2006) Cell. Mol. Life Sci. 63:2968.
  3. Netzel-Arnett, S. et al. (2006) J. Biol. Chem. 281:32941.
  4. Ahmed, S. et al. (2006) FEBS J. 273:615.
Entrez Gene IDs
6768 (Human); 19143 (Mouse); 114093 (Rat); 102117178 (Cynomolgus Monkey)
Alternate Names
EC 3.4.21; Epithin; HAI; Matriptase; Membrane-type serine protease 1; MTSP1; MT-SP1EC; prostamin; PRSS14; Serine protease 14; Serine protease TADG-15; SNC19; SNC19MTSP1; ST14; suppression of tumorigenicity 14 (colon carcinoma); suppression of tumorigenicity 14 (colon carcinoma, matriptase, epithin); suppressor of tumorigenicity 14 protein; TADG15; TADG-15; TMPRSS14; tumor associated differentially expressed gene 15 protein; Tumor-associated differentially-expressed gene 15 protein

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Citations for Human Matriptase/ST14 Catalytic Domain Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

4 Citations: Showing 1 - 4
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  1. Downregulation of matriptase suppresses the PAR?2/PLCgamma2/PKC?mediated invasion and migration abilities of MCF?7 breast cancer cells
    Authors: JM Kim, J Park, EM Noh, HK Song, SY Kang, SH Jung, JS Kim, HJ Youn, YR Lee
    Oncology reports, 2021;46(6):.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot
  2. Targeting matriptase in breast cancer abrogates tumour progression via impairment of stromal-epithelial growth factor signalling.
    Authors: Zoratti G, Tanabe L, Varela F, Murray A, Bergum C, Colombo E, Lang J, Molinolo A, Leduc R, Marsault E, Boerner J, List K
    Nat Commun, 2015;6(0):6776.
    Species: Human
    Sample Types: Whole Tissue
    Applications: IHC-P
  3. Epigenetic Silencing of SPINT2 Promotes Cancer Cell Motility via HGF-MET Pathway Activation in Melanoma.
    Authors: Hwang S, Kim H, Min M, Raghunathan R, Panova I, Munshi R, Ryu B
    J Invest Dermatol, 2015;135(9):2283-91.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot
  4. Proteolytic cleavage of human acid-sensing ion channel 1 by the serine protease matriptase.
    Authors: Clark EB, Jovov B, Rooj AK
    J. Biol. Chem., 2010;285(35):27130-43.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot


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