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- Table of Contents
SMG1 / Serine/threonine-protein kinase SMG1 · Western blot design guide
Design a Western Blot for SMG1
Real validated SMG1 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-SMG1 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
SMG1 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 | ~410.5 kDa | |
| Gel | 4–12% gradient (standard starting point) | |
| Positive control | Adrenal gland (IHC candidate; verify WB) +4 more | |
| Negative control | Breast (IHC candidate; verify WB) |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated + Acetylated | |
| Caveat | Modification-state controls | |
| Gene-set association | MSigDB C7 membership | |
| Isoform | 4 isoform(s) |
Section 1
Real Curated SMG1 Western Blot Protocols
The M02589 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | Saos2 cell lysate (catalog M02589) |
| Gel % | 4–12% gradient (standard starting point) |
| Load | 20–30 µg total protein per lane; optimize for abundance (standard starting point) |
| Transfer | Wet/tank transfer; optimize duration (standard starting point) |
| Membrane | 0.45 µm PVDF (standard starting point) |
| Blocking | 5% milk or 5% BSA in TBST (standard starting point) |
| Primary antibody | M02589; use the WB datasheet starting dilution (standard starting point) |
| Primary incubation | Overnight at 4 °C (standard starting point) |
| Secondary antibody | Species-matched HRP conjugate at validated dilution (standard starting point) |
| Secondary incubation | 1 h at room temperature (standard starting point) |
| Wash | 3 × 5 min in TBST (standard starting point) |
| Detection | ECL; bracket exposures to avoid saturation (standard starting point) |
Section 2
What Is the Expected SMG1 Western Blot Band Size?
SMG1 is predicted at 410.5 kDa; isoforms and annotated modifications could affect migration, but no empirical band size or migration effect is demonstrated.
| Band near 410.5 kDa | consistent with the predicted SMG1 mass, pending identity controls |
| Several bands near the expected region | could reflect SMG1 isoforms 1, 2, 3, and 4 if they migrate differently |
| Nearby doublet | could reflect distinct isoforms or modification states; neither pattern is established |
| Bands in nuclear and cytoplasmic fractions | consistent with SMG1 localization in both compartments |
💡Expected SMG1 appearanceUniProt predicts SMG1 at 410.5 kDa; no empirical band size or isoform migration pattern is supplied, so confirm any candidate band with antibody specificity and depletion controls.
| Predicted SMG1 mass | sets a 410.5 kDa reference for band assessment |
| Isoform 1 | has no supplied isoform-specific mass or migration |
| Isoform 2 | may differ in size, but its mass and migration are unspecified |
| Isoform 3 | may differ in size, but its mass and migration are unspecified |
| Isoform 4 | may differ in size, but its mass and migration are unspecified |
| Situation | Likely cause | Next action |
|---|---|---|
| Band higher than expected | identity or migration of the high band is unverified | compare with SMG1 depletion and an independent antibody |
| Band lower than expected | an isoform or protein breakdown is possible | check SMG1 depletion and prepare fresh lysate with protease inhibitors |
| Multiple bands | four annotated isoforms could contribute if their migration differs | test which bands respond to SMG1 depletion |
| Weak or no signal | SMG1 recovery or antibody detection may be insufficient | check lysate loading, extraction, and a positive control |
| Fragments below expected size | breakdown of the 3661-residue protein is possible | process samples promptly with protease inhibitors and compare fresh lysate |
Experiment evidence
Western blot images showing SMG1 band
M02589 · SMG1
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for SMG1 Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for SMG1 in Western blot, you can use adrenal gland tissue, which HPA scores High.
Positive control: Adrenal gland (IHC candidate; verify WB)
Negative control: Breast (IHC candidate; verify WB)
Loading controls: Run GAPDH, β-actin, and a total-protein stain such as Ponceau alongside the samples.
⚠️Feasibility: Breast is HPA not detected, but confirm that it gives a clean negative blot.
HPA tissue expression evidence for SMG1
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 |
|---|---|---|---|---|
| Adrenal gland | glandular cells | High | Protein (IHC) | HPA → |
| Bronchus | respiratory epithelial cells | High | Protein (IHC) | HPA → |
| Cerebellum | Purkinje cells | High | Protein (IHC) | HPA → |
| Colon | glandular cells | High | Protein (IHC) | HPA → |
| Duodenum | glandular cells | High | Protein (IHC) | HPA → |
Lower expression tissues · IHC evidence, not confirmed WB-negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Breast | adipocytes | Not detected | Protein (IHC) | HPA → |
| Lung | alveolar cells | Not detected | Protein (IHC) | HPA → |
| Oral mucosa | squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
| Ovary | ovarian stroma cells | Not detected | Protein (IHC) | HPA → |
| Spleen | cells in red pulp | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced SMG1 Western Blot Tips
Deeper troubleshooting and optimisation questions for SMG1, answered from its protein features.
How should SMG1 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.
How can SMG1 isoforms affect band interpretation?
Isoforms · UniProt lists four isoforms. Relative to isoform 1, isoforms 2, 3 and 4 lack residues 1–140, 1–630 and 1–1269, respectively. Check whether the antibody epitope lies in a deleted region before assigning bands to isoforms.
Define which isoforms the antibody can detect before comparing signals. Isoforms 2, 3 and 4 have different N-terminal deletions, so an epitope in those regions could exclude some isoforms from the measurement. Report whether the signal represents a specific isoform or the isoforms detectable by that antibody.
Define which isoforms the antibody can detect before comparing signals. Isoforms 2, 3 and 4 have different N-terminal deletions, so an epitope in those regions could exclude some isoforms from the measurement. Report whether the signal represents a specific isoform or the isoforms detectable by that antibody.
Which SMG1 modification sites matter when interpreting bands?
PTM · In canonical UniProt numbering, SMG1 has N6-acetyllysine at 173; phosphothreonine at 3550, 3573 and 3577; and phosphoserine at 3556 and 3570. Match antibody site numbering to this convention. These annotations do not establish that modification causes a visible band shift.
Does this guide establish induction of SMG1?
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 SMG1 Western blot?
Transfer · SMG1 is predicted to be 410.5 kDa. Choose transfer conditions suited to a protein of that size, then check the gel and membrane to confirm transfer. The supplied features do not specify a particular transfer method.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the M02589 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 SMG1 be quantified?
Quantitation · Standard workflow guidance: quantify only a validated target band within the linear exposure range. Use consistent sample preparation and loading, retain biological replicates, and avoid interpreting saturation or loading differences as regulation.
Should SMG1 migrate at its predicted 410.5 kDa?
Interpretation · Use 410.5 kDa as the predicted mass for canonical SMG1. No observed band position is supplied, so an apparent mass difference cannot be assessed. The listed modifications alone do not establish a visible shift.
Compare their positions with the 410.5-kDa canonical prediction and consider the three annotated N-terminal deletion isoforms. Check the antibody epitope against each deletion. The listed acetylation and phosphorylation sites do not, by themselves, identify any additional band.
SMG1 is annotated in both the nucleus and cytoplasm. If comparing fractions, interpret a signal in either fraction in light of those locations and keep the fraction being measured consistent across samples.
Compare their positions with the 410.5-kDa canonical prediction and consider the three annotated N-terminal deletion isoforms. Check the antibody epitope against each deletion. The listed acetylation and phosphorylation sites do not, by themselves, identify any additional band.
SMG1 is annotated in both the nucleus and cytoplasm. If comparing fractions, interpret a signal in either fraction in light of those locations and keep the fraction being measured consistent across samples.
Boster reagents
SMG1 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-Smg1 Rabbit Monoclonal Antibody
Cat # M02589
The catalog reports one anti-SMG1 rabbit monoclonal antibody, M02589, with stated Human, Mouse, and Rat reactivity. Its supplied Western blot image shows Smg1 expression in Saos2 cell lysate; no additional validation evidence is supplied.
Which to pick: M02589 is the only listed option. Its Western blot image uses Saos2 cell lysate. Consider its stated reactivity alongside your sample and verify performance under your own conditions.
Source: BosterBio SMG1 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q96Q15.
- Human Protein Atlas. SMG1 tissue expression.
- PMC9892823 — target-verified WB comparison