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WNT1 · Western blot design guide
Design a Western Blot for WNT1
Real validated WNT1 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-WNT1 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
WNT1 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 | ~41 kDa | |
| Gel | 10–12% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Glycosylated + Cleaved | |
| Caveat | Glycosylation increases apparent size | |
| Regulation | Wnt beta catenin signaling | |
| Isoform | 1 isoform(s) |
Section 1
Real Curated WNT1 Western Blot Protocols
Literature-validated Western blot parameters for WNT1 — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | human Jurkat , Lane 2: human CACO-2 , Lane 3: human Hela , Lane 4: human HepG2 , Lane 5: rat testis , Lane 6: rat C6 , Lane 7: mouse Neuro-2a . After electrophoresis, proteins were transferred to a nitrocellulose membrane at 150 mA 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-Wnt1 antigen affinity purified polyclonal antibody (PB9460) at 0.5 μg/mL overnight at 4°C, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody (Catalog # BA1054) at a dilution of 1:5000 for 1.5 hour at RT. The signal is developed using an ECL Plus Western Blotting Substrate (Catalog # AR1196-200) with Tanon 5200 system. A specific band was detected for Wnt1 at approximately 45 kDa. The expected band size for Wnt1 is at 41 kDa |
| Gel % | 10–12% |
| Load | 30 ug |
| 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 |
| Primary incubation | overnight at 4 °C |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 |
| Wash | TBS-0.1% Tween, 3 × 5 min |
| Detection | ECL |
| Exposure / imaging | Tanon 5200 |
| Observed band | 45 kDa |
Section 2
What Is the Expected WNT1 Western Blot Band Size?
WNT1's 370 aa precursor predicts 41 kDa, but signal-peptide cleavage and four N-glycosylation sites shift the mature secreted band variably above the ~38 kDa unmodified backbone.
| Band appearing somewhat larger than the ~38 kDa unmodified mature backbone | the four N-linked glycosylation sites add carbohydrate mass to the secreted, signal-peptide-cleaved chain |
| Diffuse or smeared band instead of one crisp line | heterogeneous glycan occupancy across the four N-linked sites spreads the apparent mass |
| Mature band smaller than the 41 kDa full-length translation product | the 27-residue N-terminal signal peptide is cleaved before secretion, removing about 3 kDa from the precursor |
| Weak or absent band in whole-cell lysate but present in conditioned medium or ECM fraction | WNT1 is annotated as secreted and extracellular matrix-associated, so most mature protein leaves the cell rather than accumulating intracellularly |
| Band shifts to a smaller, sharper size only under fully reducing, heat-denatured conditions | the eleven intra-chain disulfide bonds of the cysteine-rich Wnt fold keep the protein compact unless fully reduced, so incomplete reduction produces anomalous migration |
💡Expected WNT1 appearanceExpect a single WNT1 band in roughly the 38-46 kDa range, above the 38 kDa signal-peptide-cleaved backbone due to N-glycosylation at four sites, provided samples are fully reduced and denatured before loading.
| Predicted mass (UniProt) | the 370 aa full-length precursor calculates to 41 kDa, the reference point before any processing or modification is accounted for |
| N-terminal signal peptide (residues 1-27) | cleaved during secretion, removing roughly 3 kDa so the mature extracellular chain runs smaller than the 41 kDa full-length precursor |
| N-linked glycosylation at Asn29, Asn316, Asn346, Asn359 | adds variable carbohydrate mass to the mature chain, pushing the apparent band above the unmodified backbone and broadening it |
| Secreted, extracellular matrix localization | shifts most mature protein out of the cell, so intracellular lysates show weaker signal than conditioned medium or ECM-enriched fractions |
| Eleven intra-chain disulfide bonds | stabilize a compact tertiary fold that can migrate anomalously, often faster or smaller, unless samples are fully reduced and denatured |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | WNT1 is secreted and ECM-associated, so most mature protein leaves the cell instead of accumulating in whole-cell lysate | probe concentrated conditioned medium or an ECM-enriched fraction rather than relying on standard whole-cell lysate alone |
| Band higher than expected | heavy N-glycosylation at the four annotated sites adds carbohydrate mass above the unmodified backbone | treat the sample with PNGase F to deglycosylate and confirm the shift back toward the predicted backbone size |
| Broad smear instead of sharp band | heterogeneous glycan occupancy across the four N-linked sites produces a spread of closely spaced masses | run a longer, lower-percentage gel or deglycosylate the sample before electrophoresis to sharpen the band |
| Band lower than expected | incomplete reduction of the eleven intra-chain disulfide bonds leaves a compact, faster-migrating species | increase reducing agent concentration with fresh DTT or BME and fully heat-denature the sample before loading |
| Weak or no signal | as a low-abundance secreted morphogen, WNT1 may be diluted below detection in unconcentrated lysate or medium | concentrate conditioned medium, for example by TCA precipitation or spin filters, and load a larger amount of total protein |
Experiment evidence
Western blot images showing WNT1 band
PB9460 · WNT1
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for WNT1 Western blot
🧪For positive controls for WNT1 in Western blot, you can use lysate or conditioned medium from cells transiently overexpressing WNT1, since no Human Protein Atlas tissue or cell-line expression data are available for this gene.
Positive control: WNT1-overexpressing cell lysate/conditioned medium
Negative control: ubiquitously expressed; use siRNA knockdown or KO line
Loading controls: Run GAPDH and β-actin alongside a total-protein stain (e.g., stain-free gel, Ponceau S, or REVERT) as loading controls.
⚠️Feasibility: As a secreted, extracellular-matrix-associated protein, WNT1 may give weak signal in standard whole-cell lysates, so conditioned medium or concentrated secreted fractions are needed for a reliable positive control.
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 WNT1 Western Blot Tips
Deeper troubleshooting and optimisation questions for WNT1, answered from its protein features.
Why might the WNT1 band run heavier than 41 kDa?
WNT1 carries 4 predicted N-glycosylation sites and 11 disulfide bonds; N-linked glycans add mass and disulfide-stabilized folding can alter migration, so the mature secreted protein commonly resolves above the 41 kDa calculated mass on SDS-PAGE. Cleavage of the 1-27 signal peptide occurs before secretion but does not offset the glycan-driven upward shift.
Does WNT1 have isoforms that complicate band interpretation?
UniProt lists only a single WNT1 isoform with no alternative splice variants annotated, so extra bands are unlikely to reflect isoform diversity. Any additional bands more likely indicate glycosylation heterogeneity, disulfide-linked aggregates, or the 1:1 complex WNT1 forms with AFM.
What post-translational features affect WNT1 detection?
WNT1 is annotated as a lipoprotein and glycoprotein with 4 N-glycosylation sites and 11 disulfide bonds, consistent with its role as a secreted Wnt-signaling proto-oncogene ligand. Induction should be assessed in a developmental or Wnt-pathway-activated model, since expression is tied to Wnt signaling pathway activity rather than constitutive housekeeping-level expression.
How should blocking be optimized for WNT1 blots?
Because WNT1 is a glycosylated, disulfide-bonded secreted protein, glycoprotein-rich blocking reagents like milk can introduce nonspecific glycan interactions; BSA blocking is preferable. Extended blocking, around one hour, also helps reduce background from this extracellular-matrix-associated protein.
What transfer method to use for WNT1 Western blot?
Standard wet transfer to PVDF is recommended for WNT1's 41 kDa mass. Fully reduce samples with DTT or beta-mercaptoethanol to unfold the 11 disulfide bonds before transfer, since intact disulfides can hinder efficient membrane transfer. Semi-dry transfer works as an alternative, with slightly extended time to account for the glycosylated, disulfide-stabilized structure.
How to accurately quantify secreted WNT1 signal?
Because WNT1 is secreted into the extracellular matrix and can form a 1:1 complex with AFM, quantify signal from conditioned media or ECM-enriched fractions rather than whole-cell lysate alone. Avoid standard cytosolic loading controls like actin; normalize instead to total secreted protein or a co-secreted reference protein.
Why do multiple WNT1 bands appear on blots?
WNT1's 11 disulfide bonds can form non-reduced aggregates or higher-order species if samples are incompletely reduced, and its 1:1 complex with AFM may co-migrate as a shifted band. Confirm complete reduction with DTT or beta-mercaptoethanol and compare reducing versus non-reducing lanes to resolve the true monomer size.
Boster reagents
Best WNT1 Western Blot Antibodies
BosterBio's WNT1 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-Wnt1 Antibody Picoband®
Cat # PB9460
For WNT1 detection, we recommend antibodies selected for top Western blot performance, extensive literature citation, and rigorous validation, including orthogonal confirmation against negative-control tissue and complementary detection methods, ensuring confident, reproducible results in your blot design.
Which to pick: Only one Boster WNT1 antibody is catalogued here, PB9460, which includes an actual Western blot validation image, making it the clear, single choice for your WNT1 blot.
Source: BosterBio WNT1 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry P04628.
- Human Protein Atlas. WNT1 tissue expression.