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HECTD1 / E3 ubiquitin-protein ligase HECTD1 · IHC design guide
Design Immunohistochemistry for HECTD1
Plan HECTD1 staining in paraffin sections using the catalog antibody’s 2–5 μg/ml IHC range (datasheet A08428-2). Compare cytoplasmic staining with HPA tissue examples, bearing in mind the reported low consistency between antibody staining and RNA expression (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
HECTD1 Immunohistochemistry Experimental Design Guide
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before staining
| Expected localisation | Cytoplasmic tissue staining (HPA tissue IHC) | |
| Staining pattern | Cytoplasmic staining across most tissues; cell levels vary (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A08428-2) | |
| Positive control | Cerebellum+4 more · see all | |
| Negative control | Caudate+4 more · see all |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep fixation conditions consistent across sections. (standard IHC practice; not target-specific) | |
| Caveat | Low consistency between staining and RNA expression (HPA tissue IHC) | |
| Regulation | Expression regulation unreported (UniProt) | |
| Isoform / epitope | No annotated isoforms or processing; epitope location unknown (UniProt) |
Section 1
Recommended HECTD1 IHC & IF Protocols
The catalog antibody’s IHC-P protocol is paired with a published HECTD1 tissue IHC protocol (PMC7115742).
| Sample | Paraffin-embedded human hyroid papillary carcinom tissue; fixative not specified (datasheet A08428-2) |
| Fixation | Image fixative and duration unreported (datasheet A08428-2); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: EDTA pH 8.0 (datasheet A08428-2); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A08428-2) |
| Primary antibody | Rabbit anti-HECTD1, 2-5 μg/ml (datasheet A08428-2) |
| Primary incubation | Overnight at 4 °C (datasheet A08428-2) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A08428-2) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | HECTD1-positive staining in purkinje cells of cerebellum (HPA tissue IHC: Medium). HPA tissue profile: Cytoplasmic expression in most tissues. No signal in the no-primary control. |
💡Decision noteStart with heat-mediated EDTA retrieval at pH 8.0 (datasheet A08428-2); the published protocol does not specify retrieval (PMC7115742).
Section 2
What Is the Expected HECTD1 Staining Pattern?
In paraffin-section IHC, expect mainly cytoplasmic HECTD1 staining in many tissues, including Purkinje cells, cortical and hippocampal neurons, glandular cells, cardiomyocytes, and kidney tubule cells (HPA: tissue IHC). HPA rates the tissue profile Approved but reports low agreement with RNA data and pending external verification (HPA: tissue IHC reliability). UniProt assigns no subcellular location and records no transmembrane segment (UniProt: Q9ULT8).
| Cytoplasmic staining in colon glandular cells or kidney tubule cells, with nearby tissue structure visible. | This fits HPA's medium staining in those cell populations and its broader cytoplasmic IHC profile (HPA: tissue IHC). Score the named cells and compartment separately; the Approved profile still needs cautious interpretation because staining and RNA data have low consistency (HPA: tissue IHC reliability). |
| Predominantly nuclear or nucleolar chromogenic staining in a paraffin section, with little cytoplasmic signal. | This departs from the reported tissue IHC pattern and warrants an artefact check (HPA: tissue IHC). Nuclear staining alone cannot settle specificity: HPA reports enhanced nucleoplasm and nucleoli localisation in ICC-IF, a different assay (HPA: subcellular ICC-IF). |
| Strong staining in squamous epithelial cells of esophagus or germinal center cells of lymph node. | HPA reports HECTD1 as not detected in those specific cell populations (HPA: tissue IHC). Consider cross-reactivity or endogenous chromogen-generating activity, then check controls; the designation does not make every cell in either tissue a negative control (HPA: tissue IHC; general IHC practice). |
| Brown signal spreads across nuclei, stroma, and empty slide areas without a clear cellular pattern. | Treat this as diffuse background before scoring HECTD1: the reported IHC profile is cellular and mainly cytoplasmic (HPA: tissue IHC). Review blocking, washes, and detection controls as general chromogenic IHC checks (general IHC practice). |
| No cellular signal in a section containing Purkinje cells, colon glandular cells, or kidney tubule cells. | Each named population has medium staining in HPA tissue IHC, so absent signal prompts an assay check (HPA: tissue IHC). Review section integrity, antibody and detection steps, and a matched control before calling the sample biologically negative (general IHC practice). |
💡Expected HECTD1 appearanceCall a positive result when identifiable HPA-listed cells show medium, mainly cytoplasmic chromogenic staining; widespread acellular brown deposit or staining confined to an HPA-listed not-detected cell population is suspect (HPA: tissue IHC; general IHC practice).
| How strong is the tissue-pattern evidence? | The HPA tissue IHC profile is Approved, yet antibody staining has low consistency with RNA expression and awaits external verification (HPA: tissue IHC reliability). HPA002929 is IHC Approved; no Enhanced IHC status is supplied (HPA: antibodies). |
| Which cell populations make useful comparisons? | Colon glandular cells and kidney tubule cells have medium staining; esophageal squamous epithelial cells and lymph-node germinal center cells are not detected (HPA: tissue IHC). Compare the named cells, since these labels do not classify an entire organ as uniformly positive or negative. |
| Does topology predict membrane or secreted staining? | UniProt records no transmembrane segment, signal peptide, or propeptide and lists one HECTD1 chain spanning residues 1–2610 (UniProt: Q9ULT8). The record gives no basis to expect a membrane-rim or secreted-protein IHC pattern. |
| Does IF/ICC show the same compartment as tissue IHC? | Q: Should nuclear IF/ICC signal invalidate cytoplasmic IHC? A: No. HPA reports mainly nucleoplasm and nucleoli in ICC-IF, while tissue IHC is mainly cytoplasmic (HPA: subcellular ICC-IF; HPA: tissue IHC). Assess each assay in its own context. |
| Can target-specific fixation sensitivity be predicted? | Neither supplied UniProt data nor HPA tissue IHC reports a HECTD1-specific fixation effect (UniProt: Q9ULT8; HPA: tissue IHC). Any retrieval or fixation adjustment is a general assay optimisation, not a predicted shift in HECTD1 staining. |
| Situation | Likely cause | Next action |
|---|---|---|
| Expected medium-positive cells show no stain. | The result conflicts with the reported staining of Purkinje cells, colon glandular cells, or kidney tubule cells (HPA: tissue IHC); an assay failure is possible. | Confirm those cells are present and intact; check antibody, detection reagents, and a processed positive-control section (general IHC practice). |
| Nuclear staining dominates a chromogenic IHC section. | HPA's tissue IHC profile is mainly cytoplasmic, although ICC-IF places HECTD1 mainly in the nucleoplasm and nucleoli (HPA: tissue IHC; HPA: subcellular ICC-IF). | Inspect morphology and detection controls; report the compartment observed rather than transferring the IF/ICC location call to tissue IHC (general IHC practice). |
| An HPA-listed not-detected cell population stains strongly. | Staining in esophageal squamous epithelial cells or lymph-node germinal center cells conflicts with those specific HPA observations (HPA: tissue IHC). Cross-reactivity or endogenous activity is possible (general IHC practice). | Compare a matched negative-reagent control, inspect chromogen localisation, and repeat with an independently validated antibody if available (general IHC practice). |
| Diffuse brown haze obscures cellular boundaries. | Background can arise from insufficient blocking or washing, or detection-system activity (general IHC practice); haze is unlike HPA's cellular, mainly cytoplasmic profile (HPA: tissue IHC). | Run a detection-only control, review blocking and washes, and score only clearly localised cellular signal (general IHC practice). |
| Only faint signal appears in a selected tissue. | HPA lists low staining in thyroid and adrenal glandular cells, among other cell populations; faint signal there may match the reference (HPA: tissue IHC). | Identify the scored cell population, then compare a medium-staining reference section processed in the same run (HPA: tissue IHC; general IHC practice). |
| Different sections give conflicting intensity or compartment calls. | HPA reports low agreement between antibody staining and RNA data, with external verification pending (HPA: tissue IHC reliability); section quality and detection variation also merit review (general IHC practice). | Compare equivalent cell populations across runs, include matched controls, and record cytoplasmic and nuclear signals separately (general IHC practice). |
Experiment evidence
IHC & IF images showing HECTD1 staining
A08428-2 · IHCIHC analysis of HECTD1 using anti-HECTD1 antibody (A08428-2). HECTD1 was detected in a paraffin-embedded section of human hyroid papillary c
A08428-2 · IHCIHC analysis of HECTD1 using anti-HECTD1 antibody (A08428-2). HECTD1 was detected in a paraffin-embedded section of human lung cancer tissue
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000092148-HECTD1/tissue/cerebral+cortex#imid_972488
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000092148-HECTD1/tissue/colon#imid_972422
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000092148-HECTD1/tissue/liver#imid_972407
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000092148-HECTD1/tissue/kidney#imid_972424
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA002929; green = HECTD1, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA002929; green = HECTD1, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for HECTD1 IHC & IF
🧪Run colon first and score its glandular cells for HECTD1 staining (HPA: Medium in colon glandular cells); use esophageal squamous epithelial cells as the negative tissue comparator (HPA: Not detected in esophagus squamous epithelial cells). On the colon slide, adjacent nonglandular stromal cells should show little or no DAB signal as an internal background check, but their HECTD1-negative status is unverified (HPA: colon finding specifies glandular cells; standard IHC control practice).
Positive control tissue: Cerebellum (Purkinje cells, HPA Medium)
Negative control tissue: Caudate (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show HECTD1 in A-431, Hep-G2, U2OS, NIH 3T3, with annotated localisation: Nucleoplasm (enhanced), Nucleoli (enhanced) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only control, a concentration-matched rabbit IgG isotype control, and HECTD1-knockout material as a biological negative if available (caption: rabbit primary; standard IHC control practice). Check endogenous peroxidase and biotin background in colon sections before interpreting DAB signal (caption: streptavidin–biotin detection with DAB; standard IHC control practice).
⚠️Feasibility: Paraffin-section IHC has a demonstrated starting condition of heat retrieval in EDTA at pH 8.0, but the caption does not establish whether retrieval is essential (selected-SKU tissue-IHC caption). The exact selected-SKU caption does not report a fixative, and a target-specific fixation window or fixation effect is unreported in the supplied evidence (selected-SKU tissue-IHC caption). HPA ICC-IF images support assessing nucleoplasm and nucleoli, but the supplied evidence does not establish that IF or frozen sections are easier; in colon, exclude luminal or mucin-associated DAB deposits from glandular-cell scoring (HPA: subcellular ICC-IF; standard IHC interpretation practice).
HPA tissue IHC evidence for HECTD1
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low consistency between antibody staining and RNA expression data. Pending external verification.). 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 |
|---|---|---|---|---|
| Cerebellum | Purkinje cells | Medium | Protein (IHC) | HPA → |
| Cerebral cortex | Neuronal cells | Medium | Protein (IHC) | HPA → |
| Colon | Glandular cells | Medium | Protein (IHC) | HPA → |
| Epididymis | Glandular cells | Medium | Protein (IHC) | HPA → |
| Gallbladder | Glandular cells | Medium | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Caudate | Glial cells | Not detected | Protein (IHC) | HPA → |
| Esophagus | Squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
| Lymph node | Germinal center cells | Not detected | Protein (IHC) | HPA → |
| Ovary | Ovarian stroma cells | Not detected | Protein (IHC) | HPA → |
| Smooth muscle | Smooth muscle cells | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced HECTD1 IHC Tips
Troubleshoot HECTD1 staining in paraffin sections by checking retrieval, compartment, controls and scoring before interpreting differences between samples.
How should I optimize retrieval when HECTD1 staining is weak in paraffin sections?
Start with heat-mediated retrieval in EDTA, pH 8.0, the condition reported for the selected IHC-validated antibody (datasheet A08428-2). Keep section thickness, heating time and cooling time constant across samples, then compare staining in a known positive tissue alongside a no-primary control. The selected paraffin-section example used 2 μg/ml primary antibody overnight at 4°C, so check those variables before attributing weak signal to retrieval (datasheet A08428-2). If staining remains weak, compare a shorter or longer retrieval cycle on adjacent sections and reject conditions that damage morphology or increase background.
Could fixation explain weak or uneven HECTD1 staining?
Target-specific fixation sensitivity is unknown: the selected paraffin-section caption does not state a fixative (datasheet A08428-2). Record the actual fixative, fixation duration and tissue thickness for each specimen, because these variables can change epitope accessibility in routine IHC. Compare matched sections using the same EDTA, pH 8.0 retrieval and detection conditions before changing antibody concentration (datasheet A08428-2). If signal differs between specimen batches, examine morphology and processing records, then test a controlled fixation series; neither tissue staining patterns nor HECTD1 sequence features establish a target-specific fixation effect.
Should I expect cytoplasmic or nuclear HECTD1 staining in tissue sections?
The tissue IHC profile reports cytoplasmic expression in most tissues, whereas ICC/IF images report enhanced nucleoplasm and nucleoli localisation (HPA tissue IHC; HPA subcellular). UniProt does not assign HECTD1 a subcellular location and reports no transmembrane segment, so topology alone cannot settle the compartment in a paraffin section (UniProt Q9ULT8). Score cytoplasmic and nuclear DAB separately in morphologically defined cells, using a restrained hematoxylin counterstain to keep nuclear detail visible. Confirm an unexpected nuclear-only or membrane-like pattern with omission controls and an independent antibody or orthogonal measurement before calling it biological.
How do I assess whether the antibody misses a HECTD1 epitope?
The supplied record lists 0 isoforms, so it provides no annotated splice variant with which to explain selective tissue staining (UniProt Q9ULT8). HECTD1 contains a MIB/HERC2 region at residues 1266–1338, a HECT domain at 2151–2610, and reported phosphoserines including positions 631 and 640 (UniProt Q9ULT8). Check the catalog antibody's stated immunogen or epitope against these features before proposing a modification-sensitive explanation; its precise epitope is not supplied here. Compare adjacent sections with an independent epitope antibody, matched retrieval and appropriate controls if staining conflicts with another assay.
How can I investigate HECTD1 localisation by IF alongside tissue IHC?
Treat IF/ICC as a separate validation experiment: the available ICC/IF profile reports enhanced nucleoplasm and nucleoli localisation (HPA subcellular). Multiplex HECTD1 with a marker identifying the expected cell population, selected from the specimen's histology, and include single-stain controls to check channel bleed-through. Choose fluorophores after examining unstained tissue autofluorescence, favoring channels with a clear signal-to-background margin rather than assuming a particular color will work. Because HECTD1 has no reported transmembrane segment, test permeabilisation for access to intracellular epitopes; the antibody's exact epitope and its membrane-facing side are not provided (UniProt Q9ULT8).
What should I check when HECTD1 DAB staining looks diffuse or widespread?
First compare a no-primary section with the stained section, especially where pigment, damaged tissue or edge staining could mimic DAB. The selected method uses biotinylated goat anti-rabbit secondary antibody, a streptavidin–biotin complex and DAB, making secondary-only controls useful for locating detection-system background (datasheet A08428-2). Apply a peroxidase block as a general chromogenic IHC step, and assess whether endogenous biotin contributes signal before interpreting staining from this detection system. The reported tissue profile is broadly cytoplasmic but has low consistency with RNA data, so widespread brown staining alone is insufficient validation (HPA tissue IHC).
How should I quantify HECTD1 staining across tissue samples? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and compartment before scoring, because tissue IHC reports mainly cytoplasmic staining while ICC/IF reports nuclear localisation (HPA tissue IHC; HPA subcellular). For chromogenic sections, record percent positive cells and intensity, then calculate an H-score on a 0–300 scale using the same threshold and scoring rules for every sample. If spatial abundance matters, report positive cells per mm² of viable, annotated tissue and normalise to the relevant cell population or assessed tissue area. Keep retrieval, antibody exposure, development and image settings matched, and exclude folds, edges and necrotic regions from scoring.
When is an unusual HECTD1 staining pattern convincing rather than artefactual?
A convincing result should recur in intact cells of the same morphologic type, remain spatially coherent across sections and exceed no-primary and detection controls. Compare the compartment with the cytoplasmic tissue IHC profile and the nucleoplasm/nucleoli ICC/IF profile, while recognising their disagreement (HPA tissue IHC; HPA subcellular). For example, kidney tubule cells show medium tissue-IHC signal, whereas spleen red-pulp cells are reported as not detected; these are reference patterns, not universal controls (HPA tissue IHC). Treat isolated membrane rims, section edges, necrotic areas or endogenous enzyme staining as suspect until independent staining or another assay supports the observation.
Boster reagents
Best HECTD1 / E3 ubiquitin-protein ligase HECTD1 IHC Antibodies
A08428-2 has real IHC data from paraffin sections of human thyroid papillary carcinoma and lung cancer (catalog image captions); no IF/ICC data are supplied (catalog image captions).
Real IHC data
Anti-HECTD1 Antibody ®
Cat # A08428-2
A08428-2 is listed for human IHC and has images from paraffin sections of human thyroid papillary carcinoma and lung cancer (catalog application list; image captions). The catalog supplies no IF/ICC validation for A08428-2 (catalog application list; image captions).
Which to pick: Choose A08428-2 for human paraffin-section IHC: it is a rabbit polyclonal antibody with an IHC range of 2–5 μg/ml (catalog host and dilution data), and its image captions report staining at 2 μg/ml after EDTA pH 8.0 retrieval (catalog image captions). The captions describe paraffin sections but do not report the fixative (catalog image captions). There is no supported IF/ICC or cross-species pick here: A08428-2 lists human reactivity and IHC, but not IF/ICC (catalog reactivity and application list).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry Q9ULT8 (HECD1_HUMAN, E3 ubiquitin-protein ligase HECTD1).
- Human Protein Atlas. HECTD1 tissue IHC expression (reliability: Approved).
- Human Protein Atlas. HECTD1 subcellular location (ICC-IF): Mainly localized to the nucleoplasm and nucleoli..
- Human Protein Atlas. HECTD1 antibody validation summary (2 antibodies).
- HECTD1 regulates the expression of SNAIL: Implications for epithelial‑mesenchymal transition. International journal of oncology 2020 — PMC7115742.
- Hectd1 is required for development of the junctional zone of the placenta. Developmental biology 2014 — PMC4578812.
- Abnormal labyrinthine zone in the Hectd1-null placenta. Placenta 2016 — PMC4768308.
- PubMed PMID:12508121 — UniProt-cited evidence.
- PubMed PMID:10574461 — UniProt-cited evidence.
- PubMed PMID:17974005 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for HECTD1 (E3 ubiquitin-protein ligase HECTD1). Expected localisation Cytoplasmic tissue staining (HPA tissue IHC). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet A08428-2). Validated IHC antibody: A08428-2 at 2-5 μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Cerebellum (Purkinje cells); negative Caudate. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded human hyroid papillary carcinom tissue; fixative not specified (datasheet A08428-2); 2. Fixation: Image fixative and duration unreported (datasheet A08428-2); verify before use.; 3. Sectioning: 4–5 µm sections on charged slides (standard); 4. Deparaffinisation: Xylene, graded ethanol series to water (standard); 5. Antigen retrieval: Heat retrieval: EDTA pH 8.0 (datasheet A08428-2); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet A08428-2); 8. Primary antibody: Rabbit anti-HECTD1, 2-5 μg/ml (datasheet A08428-2); 9. Primary incubation: Overnight at 4 °C (datasheet A08428-2). Watch for: Fixation: Keep fixation conditions consistent across sections. (standard IHC practice; not target-specific); Caveat: Low consistency between staining and RNA expression (HPA tissue IHC); Isoform / epitope: No annotated isoforms or processing; epitope location unknown (UniProt); Regulation: Expression regulation unreported (UniProt). Evidence: UniProt Q9ULT8, HPA tissue IHC · Approved, HPA ICC-IF · Mainly localized to the nucleoplasm and nucleoli., Datasheet A08428-2, PMC7115742. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/HECTD1/immunohistochemistry-ihc-guide.