This website uses cookies to ensure you get the best experience on our website.
- Table of Contents
ATP4A / Potassium-transporting ATPase alpha chain 1 · IHC design guide
Design Immunohistochemistry for ATP4A
Plan ATP4A paraffin IHC around cytoplasmic staining in gastric parietal cells (HPA tissue IHC) and the expected apical canalicular membrane location (UniProt). The catalog antibody has a human stomach example using 2 µg/mL primary antibody and HRP/DAB detection (datasheet A08198-1).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
ATP4A 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 | Observed parietal-cell cytoplasm (HPA tissue IHC); expected apical canalicular membrane (UniProt) | |
| Staining pattern | Cytoplasmic staining in gastric parietal cells (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A08198-1) | |
| Positive control | Stomach+1 more · see all | |
| Negative control | Adipose tissue+4 more · see all |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep fixation consistent across sections (standard IHC practice; not target-specific) | |
| Caveat | High staining also reported in late spermatids (HPA tissue IHC) | |
| Regulation | No specific regulator reported (UniProt) | |
| Isoform / epitope | No isoforms annotated; cytoplasmic vs lumenal epitope side matters (UniProt) |
Section 1
Recommended ATP4A IHC & IF Protocols
The catalog antibody protocol uses heat-mediated EDTA retrieval at pH 8.0 (datasheet A08198-1). One published ATP4A paraffin-section IHC protocol uses high-temperature retrieval at pH 9 (PMC8874512).
| Sample | Paraffin-embedded rat stomach tissue; fixative not specified (datasheet A08198-1) |
| Fixation | Image fixative and duration unreported (datasheet A08198-1); 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 A08198-1); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A08198-1) |
| Primary antibody | Rabbit anti-ATP4A, 2 μg/ml (datasheet A08198-1) |
| Primary incubation | Overnight at 4 °C (datasheet A08198-1) |
| Detection | HRP-conjugated secondary, DAB chromogen (datasheet A08198-1) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | ATP4A-positive staining in glandular cells of stomach (HPA tissue IHC: High). HPA tissue profile: Cytoplasmic expression in gastric parietal cells. No signal in the no-primary control. |
💡Decision noteStart with EDTA pH 8.0 for the catalog antibody (datasheet A08198-1); consider the published pH 9 method when adapting that article’s protocol (PMC8874512).
Section 2
What Is the Expected ATP4A Staining Pattern?
ATP4A should stain gastric parietal cells: UniProt places this 10-transmembrane pump at their apical canalicular membrane (UniProt P20648 topology/localization). HPA describes cytoplasmic expression in gastric parietal cells and rates its tissue IHC profile Enhanced, reflecting high consistency between staining and RNA expression (HPA tissue IHC: Enhanced). Interpret the slide at both cell and compartment level.
| Strong staining in a subset of stomach glandular cells, with apical canalicular or cytoplasmic signal. | This fits ATP4A expression in gastric parietal cells (UniProt P20648 tissue specificity; HPA tissue IHC: stomach glandular cells High). HPA calls the tissue pattern cytoplasmic; UniProt specifies the apical canalicular membrane. Section geometry and assay resolution may make membrane-associated signal appear cytoplasmic (general IHC interpretation). |
| Predominantly nuclear staining, without a plausible parietal-cell cytoplasmic or membrane pattern. | A nuclear-only pattern conflicts with the reported HPA cytoplasmic profile and UniProt apical membrane localization (HPA tissue IHC; UniProt P20648 localization). Review controls and morphology before scoring it as ATP4A; a wrong-compartment signal can reflect nonspecific detection (general IHC practice). |
| Broad staining of cells outside the expected gastric parietal-cell population. | Consider cross-reactivity or endogenous chromogenic activity if the pattern does not match tissue morphology (general IHC practice). Cell identity matters: HPA also reports High staining in testis elongated or late spermatids, so that defined population is a documented exception to a stomach-only reading (HPA tissue IHC). |
| Uniform haze across glands, stroma, and empty spaces obscures cell boundaries. | Diffuse background does not establish ATP4A localization. Compare a no-primary control and assess blocking, wash stringency, and chromogen development (general IHC practice). Score specific signal only where the cell pattern remains distinguishable from background (general IHC practice). |
| No convincing signal in an adequately represented stomach section. | This conflicts with the reported High stomach glandular-cell staining (HPA tissue IHC). Check whether parietal cells are present, then review the assay's positive control, antibody dilution, retrieval conditions, and detection run (general IHC practice). The supplied sources do not establish ATP4A-specific fixation sensitivity. |
💡Expected ATP4A appearanceCall positive when stomach parietal cells show strong, cell-restricted cytoplasmic or apical canalicular staining (HPA tissue IHC: High; UniProt P20648 localization); isolated nuclear signal or diffuse, cell-independent color is suspect (general IHC interpretation).
| Compartment and section view | ATP4A has 10 transmembrane segments and resides at the parietal-cell apical canalicular membrane (UniProt P20648 topology/localization). HPA describes cytoplasmic IHC staining; use cell morphology and distribution when reconciling these views (HPA tissue IHC; general IHC interpretation). |
| Positive and comparison tissues | Stomach glandular cells stain High; HPA also reports High staining in testis elongated or late spermatids (HPA tissue IHC). The listed adipose, adrenal, appendix, bone marrow, breast, bronchus, caudate, and cerebellum cell populations are Not detected (HPA tissue IHC); those calls apply to the specified cells. |
| Antibody evidence | HPA lists two rabbit polyclonal antibodies, HPA039154 and HPA076684, as IHC Enhanced (HPA antibodies). HPA describes its tissue-profile reliability as Enhanced because staining is highly consistent with RNA expression (HPA tissue IHC). These ratings support pattern assessment; they do not specify a catalog-antibody dilution or retrieval method. |
| Epitope and preparation | The protein spans the membrane repeatedly, with both cytoplasmic and lumenal regions (UniProt P20648 topology). The payload gives no antibody epitope, so topology alone cannot select a retrieval or permeabilisation condition (UniProt P20648 topology; general IHC practice). ATP4A-specific fixation effects are unreported in these sources. |
| IF/ICC: what signal is supported? | HPA's subcellular summary says Membrane, but provides no main-location call or ICC-IF cell-line images; the listed antibodies have no ICC validation entry (HPA subcellular; HPA antibodies). For IF/ICC, treat membrane localization as a hypothesis from UniProt and the HPA summary, and validate it with assay controls (UniProt P20648 localization; general IF practice). |
| Situation | Likely cause | Next action |
|---|---|---|
| Stomach positive control is blank. | Parietal cells may be absent from the viewed area, or an IHC workflow step may have failed (general IHC practice). | Confirm gland morphology and parietal-cell representation; check a known-positive run, primary-antibody setup, retrieval, and detection reagents (general IHC practice). HPA reports High stomach glandular-cell staining (HPA tissue IHC). |
| Signal appears nuclear rather than cytoplasmic or canalicular. | The compartment conflicts with reported ATP4A localization; nonspecific staining is possible (HPA tissue IHC; UniProt P20648 localization; general IHC practice). | Compare a no-primary control, inspect cellular boundaries at higher magnification, and score nuclear-only color separately from plausible ATP4A signal (general IHC practice). |
| Most of the section has weak brown haze. | Background from detection chemistry, insufficient blocking or washing, or excessive chromogen development may obscure the pattern (general chromogenic IHC practice). | Inspect the no-primary control; review blocking, washes, and development time. Require a distinguishable parietal-cell pattern before scoring positivity (general IHC practice). |
| Many cell types stain in the stomach section. | A broad distribution may reflect nonspecific binding or endogenous detection activity rather than the reported parietal-cell profile (HPA tissue IHC; general IHC practice). | Map signal to cell morphology; run a no-primary control and, for peroxidase-based detection, check endogenous peroxidase blocking (general IHC practice). |
| Testis staining seems to contradict stomach enrichment. | HPA reports High protein staining in elongated or late spermatids despite stomach-enriched RNA and the reported parietal-cell expression (HPA tissue IHC; UniProt P20648 tissue specificity). | Identify the stained testis cell population before calling the result off-target. Interpret staining outside that HPA-listed population cautiously and compare appropriate controls (HPA tissue IHC; general IHC practice). |
| A change in retrieval gives a different staining pattern. | Retrieval conditions can alter an IHC assay, but the supplied HPA and UniProt records provide no ATP4A-specific retrieval or fixation-effect result (general IHC practice; HPA tissue IHC; UniProt P20648). | Compare conditions using the same positive tissue and controls, recording cell type, compartment, and background. Retain the condition that yields an interpretable pattern; do not infer an ATP4A-specific fixation mechanism from this comparison (general IHC practice). |
Experiment evidence
IHC & IF images showing ATP4A staining
A08198-1 · IHCIHC analysis of ATP4A using anti-ATP4A antibody (A08198-1). ATP4A was detected in a paraffin-embedded section of rat stomach tissue. Heat me
A08198-1 · IHCIHC analysis of ATP4A using anti-ATP4A antibody (A08198-1). ATP4A was detected in a paraffin-embedded section of human stomach tissue. Heat
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000105675-ATP4A/tissue/cerebral+cortex#imid_20892447
HPA · StomachHuman Protein Atlas IHC, Stomach. Source: https://www.proteinatlas.org/ENSG00000105675-ATP4A/tissue/stomach+1#imid_20891699
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000105675-ATP4A/tissue/colon#imid_20891725
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000105675-ATP4A/tissue/liver#imid_20891734
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for ATP4A IHC & IF
🧪Run stomach first: glandular cells should stain strongly (HPA: High in stomach glandular cells), with an apical canalicular pattern in parietal cells (UniProt P20648: apical canalicular membrane of parietal cells). Use adipose tissue as the negative tissue (HPA: Not detected in adipocytes); on the stomach slide, adjacent non-parietal cells should lack the characteristic apical canalicular signal (UniProt P20648: expression in gastric parietal cells).
Positive control tissue: Stomach (Glandular cells, HPA High)
Negative control tissue: Adipose tissue (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA carries no ICC-IF cell line for ATP4A; derive a cell-line control from the positive tissue's cell type (Glandular cells) and confirm it by RNA or western blot first.
Technical controls: Include a no-primary, secondary-only control, a species- and isotype-matched rabbit IgG control (selected-SKU caption: rabbit primary antibody), and ATP4A knockout tissue as a biological negative where available (standard IHC practice). For stomach IHC, quench endogenous peroxidase and check background before interpreting DAB staining (selected-SKU caption: HRP/DAB detection; standard IHC practice).
⚠️Feasibility: A target-specific fixation window is unreported, and the fixative in the selected-SKU paraffin-section caption is unreported (selected-SKU caption: fixative not stated). The demonstrated IHC procedure uses heat retrieval in EDTA at pH 8.0, but the evidence does not establish that retrieval is required (selected-SKU caption: EDTA heat retrieval). Frozen sections and IF have no supplied evidence showing that they are easier; assess stomach DAB background from endogenous peroxidase when scoring the expected canalicular signal (HPA: no ICC-IF cell-line images; selected-SKU caption: stomach HRP/DAB staining; standard IHC practice).
HPA tissue IHC evidence for ATP4A
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Enhanced — High consistency between antibody staining and RNA expression data.). 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 |
|---|---|---|---|---|
| Stomach | Glandular cells | High | Protein (IHC) | HPA → |
| Testis | Elongated or late spermatids | High | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Adrenal gland | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Appendix | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Not detected | Protein (IHC) | HPA → |
| Breast | Adipocytes | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced ATP4A IHC Tips
Troubleshoot ATP4A staining in paraffin section IHC by checking retrieval, parietal cell localisation and control tissue before interpreting signal intensity.
What should I change when ATP4A staining is weak after antigen retrieval?
Start with heat mediated retrieval in EDTA at pH 8.0 (datasheet A08198-1). The catalog antibody detected ATP4A in a paraffin section of rat stomach using that retrieval method, followed by 2 μg/ml primary antibody overnight at 4°C (datasheet A08198-1). If signal remains weak, compare retrieval duration on adjacent sections while keeping antibody concentration and detection constant (standard IHC practice). Check whether gastric parietal cells stain before increasing retrieval intensity, since ATP4A is expressed in those cells (UniProt P20648). Excessive heating can damage section morphology and make localisation harder to judge (standard IHC practice).
Could fixation explain weak ATP4A staining in my paraffin sections?
Target specific fixation sensitivity is unknown: the catalog image identifies a paraffin section but does not state its fixative (datasheet A08198-1). Record the fixative and fixation duration for each specimen, then compare similarly processed sections containing gastric parietal cells (standard IHC practice; UniProt P20648). Keep heat mediated EDTA retrieval at pH 8.0 and the primary antibody at 2 μg/ml constant during that comparison (datasheet A08198-1). If staining varies with processing, inspect morphology and include an on slide positive control before attributing the difference to ATP4A abundance (standard IHC practice). HPA staining patterns do not establish a fixation effect (HPA tissue IHC).
Where should ATP4A staining appear within gastric parietal cells?
Expect ATP4A at the apical canalicular membrane of gastric parietal cells (UniProt P20648 subcellular location). A section may show a complex intracellular appearing pattern because the canalicular membrane folds through the cell; HPA describes cytoplasmic staining in parietal cells (UniProt P20648 subcellular location; HPA tissue IHC). Compare staining with cell shape and gland architecture rather than requiring a simple rim at the outer cell boundary (standard IHC practice). If diffuse nuclear or uniform stromal staining dominates, review the negative control, retrieval and detection background before scoring it as ATP4A (UniProt P20648 subcellular location; standard IHC practice).
How does an unknown antibody epitope affect ATP4A IHC troubleshooting?
The supplied record annotates no ATP4A isoforms, and the catalog caption does not identify the antibody epitope (UniProt P20648 isoforms; datasheet A08198-1). ATP4A has 10 transmembrane segments with cytoplasmic and lumenal regions, so epitope accessibility can depend on processing and retrieval (UniProt P20648 topology; standard IHC practice). Its recorded phosphorylation sites include residues 7, 27 and 463, but these data do not show that this antibody recognizes a modified site (UniProt P20648 modified residues; datasheet A08198-1). If staining changes between preparations, compare matched positive tissue and request epitope information before assigning the change to an isoform or modification (standard IHC practice).
How should I adapt ATP4A staining for multiplex immunofluorescence?
Treat IF as a separate validation: the supplied catalog evidence is chromogenic staining of a paraffin section, with no IF result stated (datasheet A08198-1). Multiplex ATP4A with ATP4B, its pump partner, to help identify the expected parietal cell population, and check each channel with single stain controls (UniProt P20648 subunit; standard IF practice). Choose spectrally separated fluorophores and favor a far red channel if tissue autofluorescence obscures shorter wavelengths (standard IF practice). Match permeabilisation to the confirmed epitope: ATP4A has cytoplasmic and lumenal regions, but the antibody's epitope side is unspecified (UniProt P20648 topology; datasheet A08198-1). Optimise fixation and permeabilisation empirically for IF (standard IF practice).
How can I reduce diffuse brown background without losing parietal cell signal?
First compare a no primary control with the stained section to separate detection background from antibody dependent staining (standard IHC practice). The catalog workflow used 10% goat serum blocking, 2 μg/ml primary antibody overnight at 4°C, a peroxidase conjugated secondary, and DAB (datasheet A08198-1). For DAB IHC, block endogenous peroxidase and assess secondary only staining before reducing primary concentration or changing wash conditions (standard IHC practice). Retain gastric parietal cells as the positive reference and examine adipocytes as a negative reference, since ATP4A is expressed in the former and was not detected in the latter by HPA (UniProt P20648 tissue specificity; HPA tissue IHC).
What should I measure when comparing ATP4A IHC across stomach sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define gastric parietal cells on matched sections and score ATP4A within that cell population, since UniProt reports protein expression there (UniProt P20648 tissue specificity; standard IHC practice). An H score combines the percentage of cells at each intensity grade from 0 to 3, giving a range of 0–300 (standard IHC practice). Alternatively, report the percentage of positive parietal cells or positive cells per mm² of evaluable gland tissue (standard IHC practice). Normalise to parietal cell number or evaluable gland area, document excluded damaged regions, and apply one staining threshold across batches (standard IHC practice). Include a positive control section to monitor batch variation (standard IHC practice).
How do I distinguish true ATP4A staining from artefact?
A credible gastric signal follows parietal cell distribution and the apical canalicular membrane pattern, while HPA describes the staining as cytoplasmic in those cells (UniProt P20648 subcellular location; HPA tissue IHC). Inspect unexpected nuclear, stromal or broadly uniform staining against a no primary control before calling it positive (UniProt P20648 subcellular location; standard IHC practice). Edge staining, necrotic areas and residual endogenous peroxidase can create misleading DAB signal, so compare intact central tissue and a peroxidase blocked control (standard IHC practice). Do not reject every signal outside stomach solely by location: HPA also reports high staining in elongated or late spermatids in testis (HPA tissue IHC).
Boster reagents
Best ATP4A / Potassium-transporting ATPase alpha chain 1 IHC Antibodies
The catalog antibody has real paraffin-section IHC images from rat stomach, human stomach, and human stomach cancer; no IF image is supplied (A08198-1 image captions; catalog IF images: none).
Real IHC data
Anti-ATP4A Antibody ®
Cat # A08198-1
A08198-1 will render with a rat stomach paraffin-section IHC figure (A08198-1 card caption). Its catalog also documents human stomach and human stomach cancer IHC images and lists Human, Mouse, and Rat reactivity (A08198-1 image captions; catalog reactivity).
Which to pick: Choose A08198-1 for paraffin-section tissue IHC: its own captions show rat and human stomach sections, with fixative unreported (A08198-1 image captions). For cross-species work, the same SKU lists Human, Mouse, and Rat reactivity, although the supplied IHC images cover Human and Rat only (catalog reactivity; A08198-1 image captions). No IF/ICC application or image is supplied, so there is no supported IF/ICC pick; clonality is unreported.
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry P20648 (ATP4A_HUMAN, Potassium-transporting ATPase alpha chain 1).
- Human Protein Atlas. ATP4A tissue IHC expression (reliability: Enhanced).
- Human Protein Atlas. ATP4A subcellular location (ICC-IF): Membrane.
- Human Protein Atlas. ATP4A antibody validation summary (2 antibodies).
- Crosstalk between Acidosis and Iron Metabolism: Data from In Vivo Studies. Metabolites 2022 — PMC8874512.
- Weipiling ameliorates gastric precancerous lesions in Atp4a(-/-) mice. BMC complementary and alternative medicine 2019 — PMC6862855.
- Taurine suppresses gastric intestinal metaplasia in patient-derived organoids and Atp4a (-/-) mice. World journal of gastrointestinal oncology 2026 — PMC12898405.
- Membrane Proteome-Wide Screening of Autoantibodies in CIDP Using Human Cell Microarray Technology. Neurology(R) neuroimmunology & neuroinflammation 2024 — PMC11078148.
- PubMed PMID:2160952 — UniProt-cited evidence.
- PubMed PMID:2176086 — UniProt-cited evidence.
- PubMed PMID:15057824 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for ATP4A (Potassium-transporting ATPase alpha chain 1). Expected localisation Observed parietal-cell cytoplasm (HPA tissue IHC); expected apical canalicular membrane (UniProt). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet A08198-1). Validated IHC antibody: A08198-1 at 2 μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Stomach (Glandular cells); negative Adipose tissue. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded rat stomach tissue; fixative not specified (datasheet A08198-1); 2. Fixation: Image fixative and duration unreported (datasheet A08198-1); 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 A08198-1); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet A08198-1); 8. Primary antibody: Rabbit anti-ATP4A, 2 μg/ml (datasheet A08198-1); 9. Primary incubation: Overnight at 4 °C (datasheet A08198-1). Watch for: Fixation: Keep fixation consistent across sections (standard IHC practice; not target-specific); Caveat: High staining also reported in late spermatids (HPA tissue IHC); Isoform / epitope: No isoforms annotated; cytoplasmic vs lumenal epitope side matters (UniProt); Regulation: No specific regulator reported (UniProt). Evidence: UniProt P20648, HPA tissue IHC · Enhanced, HPA ICC-IF · Membrane, Datasheet A08198-1, PMC8874512. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/ATP4A/immunohistochemistry-ihc-guide.