Overview

  • Product name

    Human Smad4 Matched Antibody Pair Kit
    See all Smad4 kits
  • Detection method

    Colorimetric
  • Assay type

    ELISA set
  • Range

    781.25 pg/ml - 50000 pg/ml
  • Species reactivity

    Reacts with: Human
  • Product overview

    Matched Antibody Pair Kits include a capture and a biotinylated detector antibody pair, along with a calibrated protein standard, suitable for sandwich ELISA. The Matched Antibody Pair Kit can be used to quantify native and recombinant human Smad 4.


    Matched antibody pair kits and reagents deliver consistent, specific, and sensitive results.



    • Batch-to-batch consistency: only recombinant monoclonal antibodies are used in our matched antibody pairs.

    • Specificity: antibody pairs are screened in plasma and serum to ensure specificity in complex samples.

    • Sensitivity: benchmarked against commercially available antibody pairs to ensure equivalent or superior performance compared with the competition.


    Additional buffers and plates are required for the assay. An accessory pack can be purchased which includes buffer reagents required to perform 10 x 96-well plate sandwich ELISAs (ab210905).


    To receive an electronic copy of the Certificate of Analysis, please send an email with "CoA for matched antibody pair kit" in the subject line and the desired product number and lot number in the body of the email.

  • Tested applications

    Suitable for: ELISAmore details
  • Platform

    Reagents

Properties

  • Storage instructions

    Store at -20°C. Please refer to protocols.
  • Components 10 x 96 tests 2 x 96 tests
    Human Smad4 Capture Antibody 1 x 100µg 1 x 20µg
    Human Smad4 Detector Antibody 1 x 25µg 1 x 5µg
    Human Smad4 Lyophilized Protein 1 vial 1 vial
  • Research areas

  • Function

    Common SMAD (co-SMAD) is the coactivator and mediator of signal transduction by TGF-beta (transforming growth factor). Component of the heterotrimeric SMAD2/SMAD3-SMAD4 complex that forms in the nucleus and is required for the TGF-mediated signaling. Promotes binding of the SMAD2/SMAD4/FAST-1 complex to DNA and provides an activation function required for SMAD1 or SMAD2 to stimulate transcription. Component of the multimeric SMAD3/SMAD4/JUN/FOS complex which forms at the AP1 promoter site; required for syngernistic transcriptional activity in response to TGF-beta. May act as a tumor suppressor.
  • Involvement in disease

    Defects in SMAD4 are a cause of pancreatic cancer (PNCA) [MIM:260350].
    Defects in SMAD4 are a cause of juvenile polyposis syndrome (JPS) [MIM:174900]; also known as juvenile intestinal polyposis (JIP). JPS is an autosomal dominant gastrointestinal hamartomatous polyposis syndrome in which patients are at risk for developing gastrointestinal cancers. The lesions are typified by a smooth histological appearance, predominant stroma, cystic spaces and lack of a smooth muscle core. Multiple juvenile polyps usually occur in a number of Mendelian disorders. Sometimes, these polyps occur without associated features as in JPS; here, polyps tend to occur in the large bowel and are associated with an increased risk of colon and other gastrointestinal cancers.
    Defects in SMAD4 are a cause of juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome (JP/HHT) [MIM:175050]. JP/HHT syndrome phenotype consists of the coexistence of juvenile polyposis (JIP) and hereditary hemorrhagic telangiectasia (HHT) [MIM:187300] in a single individual. JIP and HHT are autosomal dominant disorders with distinct and non-overlapping clinical features. The former, an inherited gastrointestinal malignancy predisposition, is caused by mutations in SMAD4 or BMPR1A, and the latter is a vascular malformation disorder caused by mutations in ENG or ACVRL1. All four genes encode proteins involved in the transforming-growth-factor-signaling pathway. Although there are reports of patients and families with phenotypes of both disorders combined, the genetic etiology of this association is unknown.
    Defects in SMAD4 may be a cause of colorectal cancer (CRC) [MIM:114500].
  • Sequence similarities

    Belongs to the dwarfin/SMAD family.
    Contains 1 MH1 (MAD homology 1) domain.
    Contains 1 MH2 (MAD homology 2) domain.
  • Domain

    The MH1 domain is required for DNA binding.
    The MH2 domain is required for both homomeric and heteromeric interactions and for transcriptional regulation. Sufficient for nuclear import.
  • Post-translational
    modifications

    Monoubiquitinated on Lys-519 by E3 ubiquitin-protein ligase TRIM33. Monoubiquitination hampers its ability to form a stable complex with activated SMAD2/3 resulting in inhibition of TGF-beta/BMP signaling cascade. Deubiqitination by USP9X restores its competence to mediate TGF-beta signaling.
  • Cellular localization

    Cytoplasm. Nucleus. Cytoplasmic in the absence of ligand. Migrates to the nucleus when complexed with R-SMAD.
  • Information by UniProt
  • Alternative names

    • (Small) Mothers Against Decapentaplegic
    • Deleted in Pancreatic Carcinoma
    • Deleted in Pancreatic Carcinoma 4
    • Deleted in pancreatic carcinoma locus 4
    • Deletion target in pancreatic carcinoma 4
    • DPC 4
    • DPC4
    • hSMAD4
    • JIP
    • MAD homolog 4
    • MAD mothers against decapentaplegic Drosophila homolog 4
    • MAD mothers against decapentaplegic homolog 4
    • MADH 4
    • MADH4
    • Med
    • Medea
    • Mothers against decapentaplegic homolog 4
    • Mothers against decapentaplegic, Drosophila, homolog of, 4
    • Mothers against DPP homolog 4
    • MYHRS
    • OTTHUMP00000163548
    • SMA- and MAD-related protein 4
    • SMAD 4
    • SMAD family member 4
    • SMAD mothers against DPP homolog 4
    • SMAD4
    • SMAD4_HUMAN
    see all
  • Database links

Applications

Our Abpromise guarantee covers the use of ab221430 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ELISA Use at an assay dependent concentration.

Images

  • Standard calibration curve. Background subtracted values are graphed.

Protocols

References

ab221430 has not yet been referenced specifically in any publications.

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