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ATP5F1A / ATP synthase F(1) complex subunit alpha, mitochondrial · IHC design guide
Design Immunohistochemistry for ATP5F1A
Plan ATP5F1A paraffin IHC around granular cytoplasmic staining across tissues (HPA tissue IHC). Start with the catalog antibody's 2–5 μg/ml IHC range (datasheet A32267-2) and compare sections fixed consistently.
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
ATP5F1A 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 | Granular cytoplasm (HPA tissue IHC); mitochondrial inner membrane (UniProt) | |
| Staining pattern | Granular cytoplasmic staining across tissues (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A32267-2) | |
| Positive control | Adrenal gland+4 more · see all | |
| Negative control | None in HPA (detected in all 45 tissues); use no-primary + isotype controls |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A32267-2) | |
| Caveat | T-cell surface localisation may alter the expected pattern (UniProt) | |
| Regulation | Higher in fetal brain, retina and spinal cord (UniProt) | |
| Isoform / epitope | 3 isoforms; epitope location may affect surface staining (UniProt) |
Section 1
Recommended ATP5F1A IHC & IF Protocols
The catalog antibody has an IHC-P protocol (datasheet A32267-2). One published ATP5F1A protocol provides a paraffin-section multiplex staining example (PMC11244755 methods).
| Sample | Paraffin-embedded human endometrial adenocarcinoma tissue; fixative not specified (datasheet A32267-2) |
| Fixation | Image fixative and duration unreported (datasheet A32267-2); 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 A32267-2); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A32267-2) |
| Primary antibody | Rabbit anti-ATP5F1A, 2-5 μg/ml (datasheet A32267-2) |
| Primary incubation | Overnight at 4 °C (datasheet A32267-2) |
| Detection | HRP-conjugated secondary, DAB chromogen (datasheet A32267-2) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | ATP5F1A-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: Cytoplasmic expression with a granular pattern in all tissues. No signal in the no-primary control. |
💡Decision noteStart with heat-mediated EDTA retrieval at pH 8.0 for the catalog antibody (datasheet A32267-2); the published method does not specify retrieval conditions (PMC11244755 methods).
Section 2
What Is the Expected ATP5F1A Staining Pattern?
ATP5F1A is a mitochondrial ATP synthase subunit associated with the inner membrane, with no transmembrane segment annotated (UniProt P25705 topology). In paraffin tissue sections, expect granular cytoplasmic staining across tissues (HPA tissue IHC: Enhanced reliability). Examples with High staining include adrenal gland glandular cells, bronchial respiratory epithelial cells, and cerebral cortex neurons (HPA tissue IHC). Judge localisation and cell identity together with signal strength.
| Granular cytoplasmic signal in glandular cells of adrenal gland or breast, respiratory epithelial cells of bronchus, or cerebral cortex neurons (HPA tissue IHC: High). | This matches the reported tissue pattern and the mitochondrial location of ATP5F1A (HPA tissue IHC; UniProt P25705). Compare staining with the surrounding tissue on the same slide; a positive result should retain a cellular, granular distribution rather than appear as a uniform deposit (HPA tissue IHC). |
| Predominantly nuclear signal, or a smooth rim outlining many unrelated cells, with little granular cytoplasmic staining (HPA tissue IHC: expected granular cytoplasm). | Treat this as a localisation mismatch and investigate staining artefact or antibody specificity (general IHC practice). A surface signal on T cells requires separate interpretation: UniProt reports ATP5F1A colocalisation with HRG at the T-cell surface, but that observation does not establish a general surface pattern in tissue IHC (UniProt P25705). |
| Strong signal confined to unexpected structures while expected cells on the same section are weak, such as adrenal glandular cells or bronchial respiratory epithelial cells (HPA tissue IHC: High). | Consider cross-reactivity or endogenous detection activity, then check the control and the identity of the stained cells (general IHC practice). HPA reports granular expression across tissues, so staining in an unlisted cell type alone is insufficient to call a false positive (HPA tissue IHC). |
| Diffuse colour over extracellular spaces, blank areas, or many cell compartments, obscuring cell boundaries (general IHC practice). | This cannot be scored confidently against HPA’s granular cytoplasmic pattern (HPA tissue IHC). Uneven reagent coverage, insufficient washing, or detection background are general IHC possibilities; inspect the negative control and repeat with attention to those workflow steps (general IHC practice). |
| No discernible cellular signal in a section containing an expected High cell population, such as breast glandular cells or bone marrow hematopoietic cells (HPA tissue IHC). | First suspect an assay or detection failure, while allowing for differences between specimens and antibodies (general IHC practice). Confirm that the expected cells are present, compare a known-positive control, and review the antibody’s own IHC-P instructions before interpreting the sample as lacking ATP5F1A (HPA tissue IHC; general IHC practice). |
💡Expected ATP5F1A appearanceA convincing IHC positive is High, granular cytoplasmic staining in an HPA-listed cell population, such as bronchial respiratory epithelium (HPA tissue IHC); broad nuclear or extracellular colour is a suspect false-positive pattern (general IHC practice).
| Reference pattern and confidence (HPA tissue IHC) | HPA describes granular cytoplasmic expression in all tissues and rates its tissue IHC profile Enhanced, meaning high consistency between antibody staining and RNA expression (HPA tissue IHC). Use the listed High cell populations as practical positive references; the supplied record provides no negative tissue reference (HPA tissue IHC). |
| Protein location and processing (UniProt P25705) | ATP5F1A belongs to the mitochondrial ATP synthase F(1) head and is associated with the inner membrane; UniProt annotates no transmembrane segment and a mature chain spanning residues 44–553 (UniProt P25705). These annotations support mitochondrial interpretation but do not identify this antibody’s epitope or predict antigen retrieval performance. |
| Alternative forms and unusual surface localisation (UniProt P25705) | UniProt lists 3 isoforms and reports ATP5F1A with HRG on the T-cell surface (UniProt P25705). Neither annotation shows which forms the IHC antibody detects or makes membrane staining the expected tissue-wide result; evaluate an apparent surface pattern in its cellular context (UniProt P25705; HPA tissue IHC). |
| IF/ICC Q: What should be seen in a separate IF/ICC assay? (HPA subcellular ICC-IF) | A: HPA reports mitochondria as the supported main location and an additional end-piece location as approved (HPA subcellular ICC-IF). This helps interpret localisation, but IF/ICC needs its own assay validation; this IHC-P section supplies no IF/ICC protocol (HPA subcellular ICC-IF; general assay practice). |
| Situation | Likely cause | Next action |
|---|---|---|
| A listed High tissue is nearly blank (HPA tissue IHC). | The section may lack the expected cell population, or an IHC staining or detection step may have failed (general IHC practice). | Check tissue morphology and a concurrently processed positive control; follow the catalog antibody’s IHC-P instructions for retrieval and dilution (general IHC practice). No ATP5F1A-specific retrieval condition is supplied here. |
| Signal is weak but granular in the expected cells (HPA tissue IHC). | The result may be technically faint or reflect specimen variation; HPA’s High category does not set a required intensity for every specimen (HPA tissue IHC; general IHC practice). | Compare positive-control intensity under the same run, confirm that the expected cells are present, and adjust the IHC workflow only within the antibody’s validated instructions (general IHC practice). |
| Nuclei dominate the stain (HPA tissue IHC: expected granular cytoplasm). | A compartment mismatch raises concern for non-specific binding or detection artefact (general IHC practice). | Inspect a negative control and check blocking, antibody concentration, washes, and detection steps against the IHC-P instructions before assigning nuclear localisation (general IHC practice). |
| Colour is widespread outside cells or obscures tissue detail (general IHC practice). | Background from the detection workflow may be masking the granular cytoplasmic pattern (HPA tissue IHC; general IHC practice). | Check negative controls, washing and endogenous detection activity appropriate to the chromogenic system; then assess whether discrete cellular granules become visible (general IHC practice). |
| An unexpected cell population stains more strongly than an HPA-listed High population on the section (HPA tissue IHC). | Possible cross-reactivity or endogenous detection activity requires investigation; the HPA list is not an exhaustive catalogue of positive cells (HPA tissue IHC; general IHC practice). | Confirm cell identity and compare negative and known-positive controls. Report the observed pattern separately from the HPA reference rather than declaring an unlisted cell type negative by definition (HPA tissue IHC; general IHC practice). |
| A membrane-like signal appears on T cells (UniProt P25705). | UniProt reports a T-cell surface association with HRG, while HPA’s broad tissue IHC pattern is granular cytoplasmic (UniProt P25705; HPA tissue IHC). | Check whether signal is restricted to identified T cells and whether controls are clean; interpret it cautiously without extending that exception to other cell types (UniProt P25705; general IHC practice). |
Experiment evidence
IHC & IF images showing ATP5F1A staining
A32267-2 · IHCIHC analysis of ATP5F1A using anti-ATP5F1A antibody (A32267-2). ATP5F1A was detected in a paraffin-embedded section of human endometrial ade
A32267-2 · IHCIHC analysis of ATP5F1A using anti-ATP5F1A antibody (A32267-2). ATP5F1A was detected in a paraffin-embedded section of human placenta tissue
A32267-2 · IFIF analysis of ATP5F1A using anti-ATP5F1A antibody (A32267-2). ATP5F1A was detected in an immunocytochemical section of HepG2 cells. Enzyme
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000152234-ATP5F1A/tissue/cerebral+cortex#imid_15576775
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000152234-ATP5F1A/tissue/colon#imid_15576269
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000152234-ATP5F1A/tissue/liver#imid_15576270
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000152234-ATP5F1A/tissue/kidney#imid_15576271
HPA · ICC-IF U-251MGHuman Protein Atlas immunofluorescence, U-251MG, antibody CAB013067; green = ATP5F1A, blue = nucleus, red = microtubules.
HPA · ICC-IF U-251MGHuman Protein Atlas immunofluorescence, U-251MG, antibody CAB013067; green = ATP5F1A, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for ATP5F1A IHC & IF
🧪Run bronchus first and expect its respiratory epithelial cells to stain (HPA: High in bronchus respiratory epithelial cells). HPA detects ATP5F1A in all 45 scored tissues, so there is no supported negative tissue; use no-primary and isotype controls, and expect nuclei and extracellular spaces within the positive section to lack the mitochondrial staining pattern (HPA: all 45 tissues detected; HPA subcellular: mitochondria supported).
Positive control tissue: Adrenal gland (Glandular cells, HPA High)
Negative control tissue: None in HPA: ATP5F1A is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead.
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show ATP5F1A in U-251MG, U2OS, Sperm, NIH 3T3, with annotated localisation: Mitochondria (supported) (HPA subcellular).
Technical controls: Run a secondary-only slide and an isotype control matched to the rabbit primary antibody’s class and clonality, where applicable; use ATP5F1A knockout material as a biological specificity control if available (selected-SKU caption: rabbit primary; standard IHC practice). Quench endogenous peroxidase for DAB detection and check bronchial mucus for trapped chromogen (selected-SKU caption: HRP/DAB; standard IHC practice).
⚠️Feasibility: No target-specific fixation window or fixation effect is reported, and the selected-SKU paraffin-section caption does not state a fixative (selected-SKU caption: fixative unreported). The caption uses heat retrieval in EDTA at pH 8.0, but that example does not establish that retrieval is required (selected-SKU caption: EDTA pH 8.0). Frozen-section feasibility is unreported; IF/ICC offers a mitochondrial-localisation check, though the supplied evidence does not establish that it is easier than paraffin IHC (HPA subcellular: mitochondria supported; HPA ICC-IF images: U2OS).
HPA tissue IHC evidence for ATP5F1A
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 |
|---|---|---|---|---|
| Adrenal gland | Glandular cells | High | Protein (IHC) | HPA → |
| Appendix | Glandular cells | High | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | High | Protein (IHC) | HPA → |
| Breast | Glandular cells | High | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | High | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| None in HPA: ATP5F1A is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead. | ||||
Section 3
Advanced ATP5F1A IHC Tips
Troubleshoot ATP5F1A staining in paraffin sections by checking retrieval, granular cytoplasmic localisation, controls, and cell-level scoring (HPA: tissue IHC profile).
What retrieval should I try when ATP5F1A staining is weak?
Start with heat-mediated antigen retrieval in EDTA buffer at pH 8.0 (datasheet A32267-2). The selected paraffin-section image used this retrieval before overnight incubation at 4°C with 2 μg/ml primary antibody, so keep those conditions together for the first comparison (datasheet A32267-2). If staining remains weak, compare a second retrieval condition on adjacent sections while holding antibody concentration and detection constant; treat that condition as an unvalidated fallback. Judge improvement by granular cytoplasmic signal and preserved morphology, using a documented positive compartment and a no-primary control to distinguish recovered antigen from increased background (HPA: granular cytoplasmic tissue staining).
Could fixation explain weak staining in my paraffin sections?
The selected paraffin-section caption does not report a fixative, so ATP5F1A-specific fixation sensitivity is unknown (datasheet A32267-2: fixative not stated). Record the fixative, fixation duration, tissue thickness, and processing history for each section before changing the antibody conditions. As a general IHC comparison, stain adjacent sections from differently processed blocks with the same EDTA pH 8.0 retrieval and 2 μg/ml primary incubation (datasheet A32267-2: retrieval and antibody conditions). Compare granular cytoplasmic signal with tissue preservation and background; neither the HPA staining pattern nor the protein’s topology establishes a target-specific fixation effect (HPA: granular cytoplasmic profile; UniProt P25705: no transmembrane segment).
Where should convincing ATP5F1A chromogenic staining appear?
Expect a granular cytoplasmic pattern in tissue sections, consistent with the HPA profile across tissues (HPA: granular cytoplasmic expression in all tissues). ATP5F1A is mainly mitochondrial and is part of the ATP synthase F(1) head associated with the inner membrane (HPA: supported mitochondrial localisation; UniProt P25705: subunit and localisation). Assess granules within intact cells rather than treating diffuse staining across the whole section as equivalent evidence. A reported cell-surface association on T-cells is a context-specific observation, so a membrane-like IHC pattern needs independent validation before it replaces the expected mitochondrial interpretation (UniProt P25705: HRG colocalisation on T-cell surface).
Can isoforms or processing change what the IHC antibody detects?
ATP5F1A has 3 annotated isoforms, and its annotated mature chain spans residues 44–553 (UniProt P25705: isoforms and processing). The supplied caption identifies the staining antibody and conditions but does not identify its epitope, so it cannot establish which isoforms the IHC signal represents (datasheet A32267-2). Check the antibody’s documented immunogen or epitope before interpreting differences between samples as isoform changes; preserve identical EDTA pH 8.0 retrieval during that comparison (datasheet A32267-2: retrieval). Annotated phosphorylation, acetylation, and glycosylation sites are reasons to verify epitope coverage, not evidence that any specific modification alters staining (UniProt P25705: modified residues and glycosylation).
How can IF help assess an ambiguous IHC pattern?
Use IF on a separate section to test whether ATP5F1A signal overlaps a mitochondrial marker and a marker identifying the cell population being scored in IHC (HPA: supported mitochondrial localisation). Choose spectrally separated fluorophores, favoring a far-red channel when the tissue has strong shorter-wavelength autofluorescence; include single-label and no-primary controls as standard IF checks. ATP5F1A belongs to the F(1) head associated with the mitochondrial inner membrane and has no transmembrane segment, so assess whether fixation and permeabilisation allow the antibody to reach its documented epitope (UniProt P25705: subunit topology). Interpret IF as localisation support for granular chromogenic staining, while keeping the paraffin IHC conditions tied to the selected caption (datasheet A32267-2).
How do I reduce diffuse brown staining without losing ATP5F1A signal?
First compare the stained section with a no-primary control and inspect whether brown deposit follows tissue edges, damaged areas, or intact-cell granules. Block endogenous peroxidase and control nonspecific binding as standard chromogenic IHC steps; the selected caption used 10% goat serum before a peroxidase-linked secondary and DAB development (datasheet A32267-2). If background rises with signal, titrate around the documented 2 μg/ml primary condition while keeping EDTA pH 8.0 retrieval and development time consistent (datasheet A32267-2). Retain conditions that reveal granular cytoplasmic staining in intact cells without comparable deposit in the no-primary control (HPA: tissue IHC pattern).
How should I score ATP5F1A across tissue sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and analysis region before scoring, then measure the percentage of cells with granular cytoplasmic staining and its intensity (HPA: granular cytoplasmic tissue pattern). An H-score can combine intensity categories with the percentage of cells in each category; alternatively, report positive-cell percentage or positive-cell density per mm² of viable tissue. Normalise comparisons to the number of evaluable cells or viable tissue area, and keep retrieval, 2 μg/ml primary concentration, and DAB development consistent across sections (datasheet A32267-2: retrieval and primary condition). Exclude necrosis and section edges by a prespecified rule, and report the scoring method alongside representative images.
When is a strong ATP5F1A result likely to be artefactual?
A convincing result shows granular cytoplasmic staining within intact cells, matching the reported tissue pattern and mitochondrial localisation (HPA: tissue IHC profile and supported mitochondrial localisation). Treat nuclear-only signal, uniform edge staining, or deposit concentrated in necrotic areas as reasons to review morphology and controls before assigning positivity. Brown signal in a no-primary section suggests detection-system background, including endogenous peroxidase, rather than antibody-dependent ATP5F1A staining; peroxidase-linked detection and DAB were used in the selected image (datasheet A32267-2). Because HPA reports staining across tissues, judge an unexpected cell population against local morphology and independent cell identification rather than assuming that its intensity alone establishes specificity (HPA: granular cytoplasmic expression in all tissues).
Boster reagents
Best ATP5F1A / ATP synthase F(1) complex subunit alpha, mitochondrial IHC Antibodies
A32267-2 has IHC images from human paraffin sections and IF images from human cells and paraffin sections (catalog image captions). Its listed reactivity includes human, mouse and rat (catalog reactivity).
Real IHC data
Anti-ATP5F1A Antibody ®
Cat # A32267-2
A32267-2 is the only listed SKU; its IHC images show human endometrial adenocarcinoma, placenta, rectal cancer and thyroid cancer paraffin sections (catalog IHC captions). Its IF images show HepG2 cells and human placenta and colon cancer paraffin sections (catalog IF captions).
Which to pick: Choose A32267-2 for human paraffin-section IHC: its IHC caption documents EDTA retrieval at pH 8.0 and 2 μg/ml primary antibody, but does not report the fixative (catalog IHC caption). The same SKU lists IF/ICC and has IF images from HepG2 cells and human paraffin sections (catalog applications and IF captions). Human, mouse and rat reactivity is listed, while the supplied IHC and IF images document human samples only; clonality is unreported (catalog reactivity, image captions and clone field).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry P25705 (ATPA_HUMAN, ATP synthase F(1) complex subunit alpha, mitochondrial).
- Human Protein Atlas. ATP5F1A tissue IHC expression (reliability: Enhanced).
- Human Protein Atlas. ATP5F1A subcellular location (ICC-IF): Mainly localized to the mitochondria. In addition localized to the end piece..
- Human Protein Atlas. ATP5F1A antibody validation summary (3 antibodies).
- Alpha-ketoglutarate alleviates acute pancreatitis by restoring energy metabolism. iScience 2026 — PMC13059122.
- Overexpression of ATP5F1A in Cardiomyocytes Promotes Cardiac Reverse Remodeling. Circulation. Heart failure 2024 — PMC11244755.
- TNK2/ACK1-mediated phosphorylation of ATP5F1A (ATP synthase F1 subunit alpha) selectively augments survival of prostate cancer while engendering mitochondrial vulnerability. Autophagy 2023 — PMC9980697.
- Reduced Levels of ATP Synthase Subunit ATP5F1A Correlate with Earlier-Onset Prostate Cancer. Oxidative medicine and cellular longevity 2018 — PMC6261400.
- PubMed PMID:1830491 — UniProt-cited evidence.
- PubMed PMID:8428659 — UniProt-cited evidence.
- PubMed PMID:8086450 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for ATP5F1A (ATP synthase F(1) complex subunit alpha, mitochondrial). Expected localisation Granular cytoplasm (HPA tissue IHC); mitochondrial inner membrane (UniProt). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet A32267-2). Validated IHC antibody: A32267-2 at 2-5 μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Adrenal gland (Glandular cells); negative None in HPA (detected in all 45 tissues); use no-primary + isotype controls. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded human endometrial adenocarcinoma tissue; fixative not specified (datasheet A32267-2); 2. Fixation: Image fixative and duration unreported (datasheet A32267-2); 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 A32267-2); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet A32267-2); 8. Primary antibody: Rabbit anti-ATP5F1A, 2-5 μg/ml (datasheet A32267-2); 9. Primary incubation: Overnight at 4 °C (datasheet A32267-2). Watch for: Fixation: Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A32267-2); Caveat: T-cell surface localisation may alter the expected pattern (UniProt); Isoform / epitope: 3 isoforms; epitope location may affect surface staining (UniProt); Regulation: Higher in fetal brain, retina and spinal cord (UniProt). Evidence: UniProt P25705, HPA tissue IHC · Enhanced, HPA ICC-IF · Mainly localized to the mitochondria. In addition localized to the…, Datasheet A32267-2, PMC11244755. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/ATP5F1A/immunohistochemistry-ihc-guide.