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NFATC3 · Western blot design guide
Design a Western Blot for NFATC3
Real validated NFATC3 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-NFATC3 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
NFATC3 Western Blot Experimental Design Guide
Expected bands, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~115.6 kDa | |
| Observed band | ~115 kDa | |
| Gel | 8–10% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated + Acetylated | |
| Caveat | Alternative splicing isoforms | |
| Regulation | IFN-γ-induced | |
| Isoform | 6 isoform(s) |
Section 1
Real Curated NFATC3 Western Blot Protocols
Literature-validated Western blot parameters for NFATC3 — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | human 22RV1 . After Electrophoresis, proteins were transferred to a Nitrocellulose membrane at 150mA for 50-90 minutes. Blocked the membrane with 5% Non-fat Milk/ TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-NFAT4 antigen affinity purified polyclonal antibody (Catalog # A02727-2) at 0.5 ug/mL overnight at 4 then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:10000 for 1.5 hour at RT. The signal is developed using an Enhanced Chemiluminescent detection (ECL) kit (Catalog # EK1002) with Tanon 5200 system. A specific band was detected for NFAT4 at approximately 115KD. The expected band size for NFAT4 is at 115KD |
| Gel % | 8–10% |
| Load | 50ug |
| Transfer | nitrocellulose membrane, 150 mA, 50–90 min |
| Membrane | nitrocellulose |
| Blocking | 5% non-fat milk / TBS, 1.5 h RT |
| Primary antibody | 0.5 µg/mL |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:10000 |
| Wash | TBS-0.1% Tween, 3 × 5 min |
| Detection | ECL |
| Exposure / imaging | Tanon 5200 |
| Observed band | 115 kDa |
Section 2
What Is the Expected NFATC3 Western Blot Band Size?
NFATC3 has a calculated mass of 115.6 kDa and is typically observed at ~115 kDa, closely matching prediction since it lacks glycosylation, disulfide dimerization, or cleavage.
| single sharp band at approximately 115 kDa | matches the predicted mass of full-length NFATC3 monomer, since no glycosylation, disulfide linkage, or proteolytic cleavage is annotated to shift the apparent size |
| one or more closely spaced additional bands near the main ~115 kDa band | reflects co-expression of different NFATC3 splice isoforms (6 annotated) with slightly different lengths |
| fuzzy or slightly elevated migration of the main band rather than a crisp line | multiple phosphoserine sites (e.g. Ser344, Ser372, Ser1063, Ser1066) can retard mobility and broaden the band |
| signal detected in both cytoplasmic and nuclear fractions at the same molecular weight | NFATC3 shuttles between cytoplasm and nucleus without any change in mass, so distribution across fractions reflects regulated localization, not proteolysis |
💡Expected NFATC3 appearanceExpect a single band at approximately 115 kDa, closely matching NFATC3's calculated mass of 115.6 kDa, since the protein has no glycosylation, disulfide dimerization, or signal-peptide cleavage to shift its migration.
| Predicted mass (115.6 kDa) | sets the baseline expected migration position, consistent with the ~115 kDa band observed empirically |
| Splice isoforms (isoforms 1-6) | different NFATC3 isoforms can add faint bands slightly above or below the main band without changing the dominant ~115 kDa species |
| Serine phosphorylation (e.g. Ser344, Ser372, Ser1063, Ser1066) | hyperphosphorylated pools can migrate slightly slower, producing a modest upward shift or fuzzy edge on the main band |
| N-terminal acetylation (Thr2) | a minor modification with negligible impact on apparent molecular weight |
| Absence of signal peptide or propeptide | no cleaved fragment is generated, so only the full-length cytoplasmic/nuclear species is expected on the blot |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | standard whole-cell lysis buffers can under-extract the nuclear-localized pool of NFATC3 | use a lysis method that solubilizes nuclear proteins or prepare separate cytoplasmic and nuclear fractions |
| Band higher than expected | extensive serine phosphorylation across multiple sites shifts the protein to a slower-migrating form | treat lysate with a phosphatase and compare migration to confirm a phosphorylation-driven shift |
| Band lower than expected | a shorter splice isoform may be the predominant species expressed in the sample | confirm isoform identity by RT-PCR or sequencing and choose an antibody epitope common to the isoforms present |
| Multiple bands | the six annotated NFATC3 splice isoforms can produce several closely spaced bands | compare against isoform-specific controls or overexpression lysates to identify which isoforms are present |
| Broad smear instead of sharp band | heterogeneous phosphorylation states across the NFATC3 population broaden the band | apply phosphatase treatment before loading or resolve on a longer, lower-percentage gel to sharpen resolution |
Experiment evidence
Western blot images showing NFATC3 band
A02727-2 · NFATC3
A02727-3 · NFATC3
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for NFATC3 Western blot
🧪For positive controls for NFATC3 in Western blot, you can use a lysate from cells transiently or stably overexpressing NFATC3, since the Human Protein Atlas does not report tissue- or cell-line-specific expression data for this protein.
Positive control: NFATC3-overexpression lysate
Negative control: ubiquitously expressed; use siRNA knockdown or KO line
Loading controls: Run GAPDH and β-actin as loading controls alongside a total-protein stain (e.g., stain-free gel, Ponceau S, or REVERT) to confirm even transfer and loading.
⚠️Feasibility: With no HPA expression data available and NFATC3 shuttling between cytoplasm and nucleus, a validated endogenous positive tissue cannot be confirmed, so pair an overexpression lysate as the positive control with siRNA knockdown or a KO line as the negative control to establish antibody specificity.
Comprehensive Human Protein Atlas IHC scoring per tissue. Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Section 3
Advanced NFATC3 Western Blot Tips
Deeper troubleshooting and optimisation questions for NFATC3, answered from its protein features.
Why does the observed band match the predicted 115 kDa mass?
NFATC3 has no signal peptide, propeptide, or glycosylation sites, so its unmodified backbone mass predicts migration well. The observed ~115 kDa band closely matches the 115.6 kDa predicted mass, confirming detection of full-length protein without major mass-altering post-translational modifications skewing apparent size.
Why might NFATC3 blots show multiple isoform bands?
UniProt lists six alternatively spliced isoforms of NFATC3. Depending on tissue source and whether the antibody epitope is present in all variants, blots may show additional bands above or below 115 kDa that represent genuine splice isoforms rather than degradation or nonspecific binding.
What induces NFATC3 phosphorylation-state changes on blots?
NFATC3 is a phosphoprotein with five modified residues, classically regulated by calcium/calcineurin signaling. Calcineurin-mediated dephosphorylation drives cytoplasm-to-nucleus translocation, so lysates from stimulated versus resting cells can show mobility shifts or a change in cytoplasmic-to-nuclear band ratio reflecting activation state.
How should blocking be optimized for NFATC3 detection?
Since NFATC3 carries phosphorylation, acetylation, and ubiquitin-like modifications, use BSA rather than milk-based blocker, as casein phosphoproteins in milk can interfere with detection of modified residues. This reduces background from cross-reactive milk phosphoproteins while preserving specific antibody binding.
What transfer method to use for NFATC3 Western blot?
At ~115 kDa, use wet tank transfer with extended time (60-90 minutes) or overnight transfer at low voltage to ensure efficient elution of this large transcription factor from the gel. Including SDS in the transfer buffer helps mobilize the high-molecular-weight protein onto the membrane.
How to normalize NFATC3 signal in fractionation experiments?
Because NFATC3 shuttles between cytoplasm and nucleus, quantify against compartment-specific loading controls, such as tubulin for cytoplasmic fractions and a nuclear marker for nuclear fractions, rather than a single whole-cell control, to accurately capture activation-dependent redistribution instead of masking it.
What explains higher molecular weight NFATC3 bands?
NFATC3 undergoes ubiquitin-like conjugation and acetylation. Discrete bands or smears above 115 kDa may reflect SUMOylation or ubiquitination rather than nonspecific antibody binding, and can become more prominent in nuclear fractions or after proteasome-inhibitor treatment.
Boster reagents
Best NFATC3 Western Blot Antibodies
BosterBio's NFATC3 antibodies are among the best-performing WB antibodies on the market — well cited, thoroughly validated, and orthogonally cross-validated against negative tissues and complementary methods.
Real WB data
Anti-NFAT4/NFATC3 Antibody Picoband®
Cat # A02727-2
Real WB data
Anti-NFAT4/NF-ATc3/NFATC3 Antibody Picoband®
Cat # A02727-3
These anti-NFATC3 antibodies are top-performing, extensively cited reagents, thoroughly validated by Western blot and cross-checked against negative tissue and complementary detection methods, giving confident, reproducible results for accurately detecting NFATC3 in your samples.
Which to pick: Both A02727-2 and A02727-3 have real Western blot validation images. A02727-3 is explicitly annotated for NFAT4/NF-ATc3/NFATC3, making it the primary choice; A02727-2 (labeled NFAT4) serves as a validated alternative if needed.
Source: BosterBio NFATC3 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q12968.
- Human Protein Atlas. NFATC3 tissue expression.