Revision 6

#9523

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877-616-CELL (2355)

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Support:

877-678-TECH (8324)

3 Trask Lane | Danvers | Massachusetts | 01923 | USA

For Research Use Only. Not for Use in Diagnostic Procedures.

Applications:
W, IP, IF-IC, FC-FP, ChIP, ChIP-seq

Reactivity:
H M R Mk

Sensitivity:
Endogenous

MW (kDa):
52

Source/Isotype:
Rabbit IgG

UniProt ID:
#P84022

Entrez-Gene Id:
4088

Product Usage Information

For optimal ChIP and ChIP-seq results, use 10 μl of antibody and 10 μg of chromatin (approximately 4 x 106 cells) per IP. This antibody has been validated using SimpleChIP® Enzymatic Chromatin IP Kits.

Application Dilution
Western Blotting 1:1000
Immunoprecipitation 1:100
Immunofluorescence (Immunocytochemistry) 1:100 - 1:200
Flow Cytometry (Fixed/Permeabilized) 1:100
Chromatin IP 1:50
Chromatin IP-seq 1:50

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

For a carrier free (BSA and azide free) version of this product see product #44223.

Specificity/Sensitivity

SMAD3 (C67H9) Rabbit mAb detects endogenous levels of total SMAD3 protein. No cross reactivity was detected with other family members.

Species predicted to react based on 100% sequence homology

Xenopus, Zebrafish, Bovine

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues at the amino terminus of SMAD3.

Background

Members of the SMAD family of signal transduction molecules are components of a critical intracellular pathway that transmit TGF-β signals from the cell surface into the nucleus. Three distinct classes of SMADs have been defined: the receptor-regulated SMADs (R-SMADs), which include SMAD1, 2, 3, 5, and 9; the common-mediator SMAD (co-SMAD), SMAD4; and the antagonistic or inhibitory SMADs (I-SMADs), SMAD6 and 7 (1-5). Activated type I receptors associate with specific R-SMADs and phosphorylate them on a conserved carboxy-terminal SSXS motif. The phosphorylated R-SMADs dissociate from the receptor and form a heteromeric complex with SMAD4, initiating translocation of the heteromeric SMAD complex to the nucleus. Once in the nucleus, SMADs recruit a variety of DNA binding proteins that function to regulate transcriptional activity (6-8).

Following stimulation by TGF-β, Smad2 and Smad3 become phosphorylated at their carboxyl termini (Ser465 and 467 on Smad2; Ser423 and 425 on Smad3) by TGF-β Receptor I. Phosphorylated Smad 2/3 can complex with Smad4, translocate to the nucleus and regulate gene expression (9-11).

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

W: Western Blotting IP: Immunoprecipitation IF-IC: Immunofluorescence (Immunocytochemistry) FC-FP: Flow Cytometry (Fixed/Permeabilized) ChIP: Chromatin IP ChIP-seq: Chromatin IP-seq

Cross-Reactivity Key

H: Human M: Mouse R: Rat Mk: Monkey

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

Alexa Fluor is a registered trademark of Life Technologies Corporation.

U.S. Patent No. 7,429,487, foreign equivalents, and child patents deriving therefrom.

All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

Orders: 877-616-CELL (2355) orders@cellsignal.com Support: 877-678-TECH (8324) info@cellsignal.com Web: cellsignal.com
For Research Use Only. Not for Use in Diagnostic Procedures.

Revision 6

Cell Signaling Technology Logo
Western blot analysis of extracts from control HeLa cells (lane 1) or HeLa cells with an apparent in-frame truncation mutation in the gene encoding SMAD3 (lane 2) using SMAD3 (C67H9) Rabbit mAb #9523 (upper) or β-actin (D6A8) Rabbit mAb #8457 (lower). The change in SMAD3 molecular weight in the mutated HeLa cells is consistent with an in-frame deletion.
Western Blotting Image 1: SMAD3 (C67H9) Rabbit mAb
Western blot analysis of extracts from HT1080 (human), C2C12 (mouse) and B35 (rat) using SMAD3 (C67H9) Rabbit mAb.
Western Blotting Image 2: SMAD3 (C67H9) Rabbit mAb
Western blot analysis of extracts from HT1080 cells, treated with TGF-β1, TGFR inhibitor SB-431542 or BMP-2, using Phospho-SMAD3 (Ser423/425) (C25A9) Rabbit mAb #9520 (upper) or total SMAD3 (C67H9) Rabbit mAb #9523 (lower).
Western Blotting Image 3: SMAD3 (C67H9) Rabbit mAb
Orders: 877-616-CELL (2355) orders@cellsignal.com Support: 877-678-TECH (8324) info@cellsignal.com Web: cellsignal.com
For Research Use Only. Not for Use in Diagnostic Procedures.

Revision 6

Cell Signaling Technology Logo
Confocal immunofluorescent analysis of HT1080 cells, untreated (left) or TGFβ-treated (right), using SMAD3 (C67H9) Rabbit mAb (green). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red).
Immunofluorescence Image 1: SMAD3 (C67H9) Rabbit mAb
Flow cytometric analysis of HT-1080 cells using SMAD3 (C67H9) Rabbit mAb #9523 (blue) compared to a nonspecific negative control antibody (red).
Flow Cytometry Image 1: SMAD3 (C67H9) Rabbit mAb
Chromatin immunoprecipitations were performed with cross-linked chromatin from HaCaT cells treated with Human TGF-β3 #3706 (7 ng/ml) for 1 h and SMAD3 (C67H9) Rabbit mAb, using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. DNA Libraries were prepared using DNA Library Prep Kit for Illumina® (ChIP-seq, CUT&RUN) #56795. The figure shows binding across CDKN1A, a known target gene of SMAD3 (see additional figure containing ChIP-qPCR data).
Chromatin Immunoprecipitation Image 1: SMAD3 (C67H9) Rabbit mAb
Orders: 877-616-CELL (2355) orders@cellsignal.com Support: 877-678-TECH (8324) info@cellsignal.com Web: cellsignal.com
For Research Use Only. Not for Use in Diagnostic Procedures.

Revision 6

Cell Signaling Technology Logo
Chromatin immunoprecipitations were performed with cross-linked chromatin from HaCaT cells treated with Human TGF-β3 #3706 (7 ng/ml) for 1 h and SMAD3 (C67H9) Rabbit mAb, using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. DNA Libraries were prepared using DNA Library Prep Kit for Illumina® (ChIP-seq, CUT&RUN) #56795. The figure shows binding across chromosome 6 (upper), including CDKN1A (lower), a known target gene of SMAD3 (see additional figure containing ChIP-qPCR data).
Chromatin Immunoprecipitation Image 2: SMAD3 (C67H9) Rabbit mAb
Chromatin immunoprecipitations were performed with cross-linked chromatin from HaCaT cells treated with Human TGF-β3 #3706 (7 ng/ml) for 1 h and either SMAD3 (C67H9) Rabbit mAb or Normal Rabbit IgG #2729 using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. The enriched DNA was quantified by real-time PCR using SimpleChIP® Human CDKN1A Intron 1 Primers #4669, SimpleChIP® Human ID1 Promoter Primers #5139, and SimpleChIP® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin, which is equivalent to one.
Chromatin Immunoprecipitation Image 3: SMAD3 (C67H9) Rabbit mAb
Orders: 877-616-CELL (2355) orders@cellsignal.com Support: 877-678-TECH (8324) info@cellsignal.com Web: cellsignal.com
For Research Use Only. Not for Use in Diagnostic Procedures.