Human Matriptase/ST14 Catalytic Domain Antibody

Catalog # Availability Size / Price Qty
Detection of Matriptase/ST14 Catalytic Domain in PC‑3 Human Cell Line by Flow Cytometry.
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Product Details
Citations (14)
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Reviews (2)

Human Matriptase/ST14 Catalytic Domain Antibody Summary

Species Reactivity
Detects human Matriptase/ST14 Catalytic Domain in direct ELISAs and Western blots.
Polyclonal Sheep IgG
Antigen Affinity-purified
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
0.1 µg/mL
Recombinant Human Matriptase/ST14 Catalytic Domain
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 Catalytic Domain antibody in PC-3 Human Cell Line antibody by Flow Cytometry. View Larger

Detection of Matriptase/ST14 Catalytic Domain in PC‑3 Human Cell Line by Flow Cytometry. PC-3 human prostate cancer cell line was stained with Sheep Anti-Human Matriptase/ST14 Catalytic Domain Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3946, filled histogram) or control antibody (5-001-A, open histogram), followed by NorthernLights™ 557-conjugated Anti-Sheep IgG Secondary Antibody (NL010). To facilitate intracellular staining, cells were fixed with paraformaldehyde and permeabilized with saponin.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Reconstitute at 0.2 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). R&D Systems rhST14 corresponds to the catalytic domain, and is inhibited effectively by rhHAI-1 and rhHAI-2A (R&D Systems, Catalog # 1048-PI and 1106-PI).

  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.

14 Citations: Showing 1 - 10
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  1. Matriptase Cleaves EpCAM and TROP2 in Keratinocytes, Destabilizing Both Proteins and Associated Claudins
    Authors: CJ Wu, M Lu, X Feng, G Nakato, MC Udey
    Cells, 2020;9(4):.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot
  2. Conserved function of the matriptase-prostasin proteolytic cascade during epithelial morphogenesis
    Authors: L Drees, T Königsmann, MHJ Jaspers, R Pflanz, D Riedel, R Schuh
    PLoS Genet., 2019;15(1):e1007882.
    Species: Drosophila
    Sample Types: Whole Embryo
    Applications: IHC
  3. Inflammatory cytokines down-regulate the barrier protective prostasin-matriptase proteolytic cascade early in experimental colitis
    Authors: MS Buzza, TA Johnson, GD Conway, EW Martin, S Mukhopadhy, T Shea-Donoh, TM Antalis
    J. Biol. Chem., 2017;0(0):.
    Species: Mouse
    Sample Types: Whole Tissue
    Applications: IHC
  4. Matriptase zymogen supports epithelial development, homeostasis and regeneration
    Authors: S Friis, D Tadeo, SM Le-Gall, HJ Jürgensen, KU Sales, E Camerer, TH Bugge
    BMC Biol., 2017;15(1):46.
    Species: Mouse
    Sample Types: Tissue Homogenates
    Applications: Western Blot
  5. Distinct Developmental Functions of Prostasin (CAP1/PRSS8) Zymogen and Activated Prostasin
    Authors: S Friis, DH Madsen, TH Bugge
    J. Biol. Chem, 2016;291(6):2577-82.
    Species: Mouse
    Sample Types: Tissue Homogenates
    Applications: Simple Western
  6. Matriptase promotes inflammatory cell accumulation and progression of established epidermal tumors.
    Authors: Sales K, Friis S, Abusleme L, Moutsopoulos N, Bugge T
    Oncogene, 2015;34(35):4664-72.
    Species: Mouse
    Sample Types: Tissue Homogenates
    Applications: Western Blot
  7. 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: Cell Lysates
    Applications: Western Blot
  8. Regulation of feto-maternal barrier by matriptase- and PAR-2-mediated signaling is required for placental morphogenesis and mouse embryonic survival.
    Authors: Szabo R, Peters D, Kosa P, Camerer E, Bugge T
    PLoS Genet, 2014;10(7):e1004470.
    Species: Mouse
    Sample Types: Tissue Homogenates
    Applications: Western Blot
  9. Matriptase proteolytically activates influenza virus and promotes multicycle replication in the human airway epithelium.
    Authors: Beaulieu A, Gravel E, Cloutier A, Marois I, Colombo E, Desilets A, Verreault C, Leduc R, Marsault E, Richter M
    J Virol, 2013;87(8):4237-51.
    Species: Human
    Sample Types: Whole Cells
    Applications: ICC
  10. Reduced prostasin (CAP1/PRSS8) activity eliminates HAI-1 and HAI-2 deficiency-associated developmental defects by preventing matriptase activation.
    Authors: Szabo, Roman, Uzzun Sales, Katiuchi, Kosa, Peter, Shylo, Natalia, Godiksen, Sine, Hansen, Karina K, Friis, Stine, Gutkind, J Silvio, Vogel, Lotte K, Hummler, Edith, Camerer, Eric, Bugge, Thomas H
    PLoS Genet, 2012;8(8):e1002937.
    Species: Mouse
    Sample Types: Tissue Homogenates
    Applications: Western Blot
  11. Endogenous expression of matriptase in neural progenitor cells promotes cell migration and neuron differentiation.
    Authors: Fang JD, Chou HC, Tung HH
    J. Biol. Chem., 2011;286(7):5667-79.
    Species: Mouse
    Sample Types: Cell Lysates
    Applications: Western Blot
  12. c-Met-induced epithelial carcinogenesis is initiated by the serine protease matriptase.
    Authors: Szabo R, Rasmussen AL, Moyer AB
    Oncogene, 2011;30(17):2003-16.
    Species: Mouse
    Sample Types: Cell Lysates
    Applications: Western Blot
  13. Matriptase initiates activation of epidermal pro-kallikrein and disease onset in a mouse model of Netherton syndrome.
    Authors: Sales KU, Masedunskas A, Bey AL
    Nat. Genet., 2010;42(8):676-83.
    Species: Mouse
    Sample Types: Whole Tissue
    Applications: IHC
  14. Loss of matriptase suppression underlies spint1 mutation-associated ichthyosis and postnatal lethality.
    Authors: Szabo R, Kosa P, List K, Bugge TH
    Am. J. Pathol., 2009;174(6):2015-22.
    Species: Mouse
    Sample Types: Recombinant Protein
    Applications: Western Blot


  1. Why is intracellular flow staining performed with Human Matriptase/ST14 Catalytic Domain Antibody (Catalog #s MAB3946 and AF3946) when Human Matripase is a type II transmembrane serine protease?

    • We have performed intracellular staining with Catalog #s MAB3946 and AF3946 because when PC-3 and some other cell lines were tested using the surface staining protocol, the results were negative. It is possible that the level of expression of this protein is too low to be detected on the surface. Furthermore, with optimization of staining, one may be able to detect protein on the surface.

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Human Matriptase/ST14 Catalytic Domain Antibody
By Anonymous on 12/13/2019
Application: WB Sample Tested: Cell Lysates Species: E. coli

0.44 ug recombinant matriptase catalytic domain (R&D; Catalog Number: 3946-SEB) were used in a biochemical cleavage assay. Samples were analyzed under denaturing/reducing conditions by SDS-PAGE/western blot and stained using this matriptase catalytic domain antibody (0.1 ug/ml; blocking 1x supplemented with 10 % milk). I would recommend this antibody.

Human Matriptase/ST14 Catalytic Domain Antibody
By Anonymous on 12/11/2019
Application: WB Sample Tested: S2 Drosophila embryonic epithelial cell line Species: Drosophila

Full length matriptase was overexpressed exclusively or co-overexpressed with its human inhibitor in Drosophila S2R+ cells. After three days incubation, supernatants of cells were examined under denaturing/reducing conditions using SDS-PAGE/western blot and antibody staining. The antibody stains three forms of matriptase: the mature and shedded matriptase as well as the catalytic domain.