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KIF1A / Kinesin-like protein KIF1A · Western blot design guide
Design a Western Blot for KIF1A
Real validated KIF1A Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-KIF1A WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Evidence assembled September 2026 · For research use; verify linked source records and product datasheet before use
KIF1A 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 | ~191.1 kDa | |
| Observed band | ~191 kDa | |
| Gel | 5–20% (catalog A03779-1) | |
| Negative control | Suggested KO / knockdown lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated | |
| Caveat | Phosphorylation-state controls | |
| Gene-set association | MSigDB C7 membership | |
| Isoform | 3 isoform(s) |
Section 1
Real Curated KIF1A Western Blot Protocols
The A03779-1 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | rat brian, mouse brain (catalog A03779-1) |
| Gel % | 5–20% (catalog A03779-1) |
| Load | 30 ug; reducing conditions (catalog A03779-1) |
| Transfer | a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog A03779-1) |
| Membrane | nitrocellulose membrane (catalog A03779-1) |
| Blocking | 5% non-fat milk/TBS for 1.5 hour at RT (catalog A03779-1) |
| Primary antibody | A03779-1 · 0.5 μg/mL (catalog A03779-1) |
| Primary incubation | overnight at 4°C (catalog A03779-1) |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 (catalog A03779-1) |
| Secondary incubation | 1.5 hour at RT (catalog A03779-1) |
| Wash | TBS-0.1%Tween 3 times with 5 minutes each (catalog A03779-1) |
| Detection | ECL (catalog A03779-1) |
Section 2
What Is the Expected KIF1A Western Blot Band Size?
KIF1A is predicted at 191.1 kDa and observed at ~191 kDa; any small difference has no established biological cause.
| Band at ~191 kDa | Matches the empirical KIF1A band and its 191.1 kDa predicted mass |
| Several bands near the expected region | Could include isoforms 1, 2, and 3; distinct migration is unconfirmed |
| Band near twice the monomer size | Could reflect retained KIF1A dimers; a stable SDS-PAGE dimer band is unconfirmed |
| Faint band in whole-cell lysate | KIF1A localizes to neuronal projections and the cytoskeleton, so sample abundance may vary |
💡Expected KIF1A appearanceExpect the empirical ~191 kDa band, consistent with the 191.1 kDa predicted mass; confirm its identity with an appropriate positive sample and antibody specificity controls.
| UniProt predicted mass | Full-length KIF1A is predicted at 191.1 kDa and observed at ~191 kDa |
| Splice isoform 1 | May differ in size from isoforms 2 and 3; its mass and migration are unspecified |
| Splice isoform 2 | May differ in size from isoforms 1 and 3; its mass and migration are unspecified |
| Splice isoform 3 | May differ in size from isoforms 1 and 2; its mass and migration are unspecified |
| Dimeric motor | An intact dimer could appear near twice the monomer size, but its persistence during SDS-PAGE is unproven |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | KIF1A abundance may be low in the sampled material | Use a KIF1A-positive neuronal sample and check antibody performance |
| Band higher than expected | A retained dimer is possible, though no interchain disulfide is listed | Compare reducing conditions and verify band identity with an independent antibody |
| Band lower than expected | An isoform or protein breakdown is possible; individual isoform sizes are unknown | Check sample integrity and compare with a full-length positive control |
| Multiple bands | Isoforms 1, 2, and 3 are listed, but their migration patterns are unknown | Check which bands track with KIF1A using an independent antibody or depletion control |
| Weak or no signal | KIF1A localization to neuronal projections may limit its abundance in the sample | Use a suitable neuronal sample and verify loading and transfer |
| Fragments below expected size | Protein breakdown during sample preparation is possible | Prepare fresh lysate with protease inhibitors and confirm fragment identity |
Experiment evidence
Western blot images showing KIF1A band
A03779-1 · KIF1A
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for KIF1A Western blot
🧪For positive controls for KIF1A in Western blot, you can use no HPA-supported tissue or cell sample from the supplied evidence.
Positive control: No high/medium HPA tissue identified
Negative control: Suggested KO / knockdown lysate
Loading controls: Run GAPDH, β-actin, and a total-protein stain alongside the samples.
⚠️Feasibility: HPA provides no expression data, so suitable positive and negative samples cannot be identified.
HPA tissue expression evidence for KIF1A
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.
Higher expression tissues · candidate positive controls from IHC
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| No high/medium HPA tissues identified in the supplied evidence. | ||||
Lower expression tissues · IHC evidence, not confirmed WB-negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| No lower-expression tissue rows available in the supplied evidence. | ||||
Section 3
Advanced KIF1A Western Blot Tips
Deeper troubleshooting and optimisation questions for KIF1A, answered from its protein features.
How should KIF1A band migration be interpreted?
Band shift · Use the separately labelled calculated mass and catalog-observed evidence above. A sequence annotation does not establish an observed migration shift. Verify target identity with orthogonal controls.
Could KIF1A isoforms produce different bands?
Isoforms · Yes. Isoforms 2 and 3 replace the residue at canonical positions 394 and 848 with longer sequences; isoform 2 also replaces the residue at position 1234. These sequence differences could affect apparent mass. Check which isoforms the antibody recognizes before assigning separate bands.
Which phosphorylation sites matter when interpreting KIF1A bands?
PTM · The supplied UniProt coordinates list phosphoserine at 416, 418, 419, 932, 937, 1310, 1337, 1528, 1532 and 1548, and phosphothreonine at 607, 612, 1519 and 1523. These are canonical sequence coordinates and may differ from isoform or antibody numbering. Site presence does not establish a visible band shift.
Does this guide establish induction of KIF1A?
Induction · No general induction response is established by this guide. A pathway or gene-set association is not evidence of induction in a particular specimen. Verify the relevant treatment and control in a target-specific experiment.
What transfer method to use for KIF1A Western blot?
Transfer · Use a transfer setup validated for proteins around KIF1A’s predicted 191.1 kDa mass, and check transfer near that size with a marker. The supplied features do not specify a membrane, transfer method or settings.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A03779-1 datasheet where specified. Otherwise compare 5% milk or 5% BSA in TBST; for a phospho-specific assay start with BSA. Optimize background and specific signal with matched controls.
How should KIF1A bands be quantified?
Quantitation · Quantify the same defined band across samples. Because three isoforms and multiple phosphorylation sites are listed, document whether the antibody measures one isoform or a combined signal before comparing intensities.
Should KIF1A migrate at its predicted mass?
Interpretation · The predicted mass is 191.1 kDa, and the supplied observed band is approximately 191 kDa. Use that region as a starting point for identification. The listed features alone do not establish a visible shift.
First compare them with the approximately 191 kDa observed band and consider the listed isoform sequence changes. KIF1A is described as a dimeric motor, but that annotation does not establish that a higher Western blot band is a dimer. The phosphorylation sites likewise do not prove that a shifted band is phosphorylated.
The supplied locations include cytoskeleton, neuron projection, axon and perinuclear region, with synapse also listed among the keywords. Select samples or fractions containing these compartments when planning detection, and interpret a weak signal in light of the material sampled.
First compare them with the approximately 191 kDa observed band and consider the listed isoform sequence changes. KIF1A is described as a dimeric motor, but that annotation does not establish that a higher Western blot band is a dimer. The phosphorylation sites likewise do not prove that a shifted band is phosphorylated.
The supplied locations include cytoskeleton, neuron projection, axon and perinuclear region, with synapse also listed among the keywords. Select samples or fractions containing these compartments when planning detection, and interpret a weak signal in light of the material sampled.
Boster reagents
KIF1A Western Blot Antibodies
Catalog antibodies with Western blot application and product-specific WB images. Evaluate suitability with the reported sample, controls and experimental conditions.
Real WB data
Anti-KIF1A Antibody Picoband®
Cat # A03779-1
The catalog reports A03779-1, a rabbit polyclonal anti-KIF1A antibody with reported human, mouse, and rat reactivity. Its WB image shows an approximately 191 kDa band in rat and mouse brain lysates. The supplied caption does not show a human WB sample.
Which to pick: A03779-1 is the only listed option. Its WB image uses rat and mouse brain lysates at 30 μg per lane and 0.5 μg/mL primary antibody. Human reactivity is listed, but no human WB example is supplied.
Source: BosterBio KIF1A gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q12756.
- Human Protein Atlas. KIF1A tissue expression.
- PMC3680435 — target-verified WB comparison
- PMC5775621 — target-verified WB comparison
- PMC5768630 — target-verified WB comparison