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OGA / Protein O-GlcNAcase · IHC design guide
Design Immunohistochemistry for OGA
Plan chromogenic IHC for OGA in paraffin sections using the catalog antibody’s tissue protocol (datasheet A32463). Compare nuclear and cytoplasmic staining with the HPA tissue profile, and account for its low consistency with RNA expression (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
OGA 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 and nuclear staining in most tissues (HPA tissue IHC) | |
| Staining pattern | Most tissue cells: cytoplasmic and nuclear staining (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A32463) | |
| Positive control | Oral mucosa+4 more · see all | |
| Negative control | Adipose tissue+4 more · see all |
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 A32463) | |
| Caveat | Staining shows low consistency with RNA expression (HPA tissue IHC) | |
| Regulation | No staining-linked regulator reported (UniProt) | |
| Isoform / epitope | 4 isoforms; check epitope coverage across variants (UniProt) |
Section 1
Recommended OGA IHC & IF Protocols
The catalog antibody’s IHC-P protocol is paired with one published OGA IHC protocol (PMC11871760).
| Sample | Paraffin-embedded rat spleen tissue; fixative not specified (datasheet A32463) |
| Fixation | Image fixative and duration unreported (datasheet A32463); 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 A32463); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A32463) |
| Primary antibody | Rabbit anti-OGA, 2 μg/ml (datasheet A32463) |
| Primary incubation | Overnight at 4 °C (datasheet A32463) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A32463) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | OGA-positive staining in squamous epithelial cells of oral mucosa (HPA tissue IHC: High). HPA tissue profile: Cytoplasmic and nuclear expression in most tissues. No signal in the no-primary control. |
💡Decision noteStart with heat-mediated EDTA retrieval at pH 8.0 (datasheet A32463); the published excerpt does not specify retrieval (PMC11871760).
Section 2
What Is the Expected OGA Staining Pattern?
OGA is a soluble protein without a transmembrane segment (UniProt O60502 topology). In paraffin tissue IHC, expect cytoplasmic and nuclear staining in many tissues (HPA tissue IHC: Approved; cytoplasmic and nuclear expression in most tissues). Judge signal by cell type: oral squamous epithelial cells and spermatogonia stain strongly, while some other sampled cells are undetected (HPA tissue IHC). HPA reports low consistency between antibody staining and RNA expression data (HPA tissue IHC reliability).
| Oral squamous epithelial cells or spermatogonia show strong cytoplasmic and/or nuclear chromogen, with recognizable cell boundaries (HPA tissue IHC: High in both cell types; cytoplasmic and nuclear profile). | This fits the reported positive pattern. Score the named cells and their compartments separately; neighboring cells need not share the same intensity (HPA tissue IHC: cell-specific levels). Treat intensity as an observed IHC category, not a quantitative OGA concentration (standard IHC practice). |
| Signal is mainly confined to cell membranes, extracellular material, or luminal deposits, without a credible intracellular pattern (UniProt O60502: nucleus, cytoplasm; no transmembrane segment). | That distribution conflicts with the recorded locations and warrants an artefact check (UniProt O60502 subcellular location and topology). Compare with a no-primary control and inspect pigment or precipitate before assigning OGA positivity (standard IHC practice). |
| Strong staining appears in adipocytes, cardiomyocytes, or placental trophoblastic cells (HPA tissue IHC: Not detected in these sampled cell types). | This is discordant with the cited HPA observations; cross-reactivity or endogenous detection activity is possible, not proven (HPA tissue IHC; standard IHC practice). Confirm cell identity and compare no-primary and detection-only controls before interpreting the signal. |
| Pale chromogen covers most cells and stroma uniformly, obscuring nuclear and cytoplasmic boundaries (HPA tissue IHC: cellular cytoplasmic and nuclear profile). | A diffuse veil cannot establish cell-specific OGA localisation (HPA tissue IHC: cell-specific staining levels). Check a no-primary control, blocking, wash quality, and detection exposure for nonspecific background (standard IHC practice). |
| Neither oral squamous epithelial cells nor spermatogonia stain in an otherwise interpretable section (HPA tissue IHC: High in these cells). | This weakens confidence in a negative call elsewhere, although HPA's Approved IHC assessment has low antibody–RNA consistency (HPA tissue IHC reliability). Review tissue preservation, retrieval, antibody dilution, and detection controls as general IHC checks (standard IHC practice). |
💡Expected OGA appearanceCall a convincing positive result when the expected cells show intracellular cytoplasmic and/or nuclear chromogen, especially strong staining in oral squamous epithelium or spermatogonia (HPA tissue IHC: High; cytoplasmic and nuclear profile); isolated membrane or extracellular deposits are discordant (UniProt O60502 topology and location).
| Cell-specific tissue pattern (HPA tissue IHC) | High staining is recorded in oral squamous epithelial cells and spermatogonia; appendix glandular, bronchial respiratory epithelial, and cortical neuronal cells are Medium (HPA tissue IHC). Select a comparator by the cell population being scored, since a tissue label alone does not specify the positive cells (HPA tissue IHC). |
| Compartment evidence differs by assay (UniProt O60502; HPA tissue IHC and subcellular ICC-IF) | UniProt lists nucleus and cytoplasm, and tissue IHC reports both compartments (UniProt O60502; HPA tissue IHC). HPA ICC-IF supports cytosol as its main location; that assay-specific observation does not erase the tissue IHC nuclear pattern (HPA subcellular ICC-IF; HPA tissue IHC). |
| Antibody evidence and interpretation limit (HPA antibodies; HPA tissue IHC reliability) | HPA036141 is Approved for IHC, whereas HPA076501 is Supported for ICC-IF, with no IHC status supplied for the latter (HPA antibodies). The tissue assessment also reports low staining–RNA consistency, so a plausible pattern still needs appropriate controls (HPA tissue IHC reliability; standard IHC practice). |
| Q: What should IF/ICC show? (HPA subcellular ICC-IF) | A: HPA supports cytosolic localisation and lists images in A-431 and U2OS (HPA subcellular ICC-IF). This is an IF/ICC interpretation cue, not an IHC-P protocol or a basis for applying IF exposure settings to chromogenic tissue scoring (HPA subcellular ICC-IF; standard IHC practice). |
| Processing and fixation evidence (UniProt O60502; supplied HPA records) | UniProt lists a single 1–916 chain, with no signal peptide or propeptide and no transmembrane segment (UniProt O60502 processing and topology). Target-specific fixation sensitivity and an OGA retrieval condition are unreported in the supplied records; choose and document retrieval using general IHC practice. |
| Situation | Likely cause | Next action |
|---|---|---|
| A known positive cell population is blank (HPA tissue IHC: High oral squamous epithelial cells or spermatogonia). | An ineffective staining run or poorly preserved section is possible; the HPA pattern alone cannot identify the failed step (HPA tissue IHC; standard IHC practice). | Check a same-run positive control, section quality, retrieval, antibody dilution, and detection reagents; document each condition tested (standard IHC practice). |
| Everything is brown, including stroma (HPA tissue IHC: expected cellular profile). | Nonspecific background, excess detection signal, or endogenous enzyme activity can obscure cell boundaries (standard chromogenic IHC practice). | Compare no-primary and detection-only controls; adjust blocking, washes, or detection exposure according to the control result (standard IHC practice). |
| Only nuclei stain, with no visible cytoplasm (HPA tissue IHC: cytoplasmic and nuclear profile). | A nuclear component is compatible with UniProt, but exclusive nuclear staining is narrower than HPA's tissue profile (UniProt O60502 location; HPA tissue IHC). | Review cell boundaries and counterstain, then compare with a positive control and no-primary control before scoring nuclear-only signal (standard IHC practice). |
| Strong signal appears mainly in adipocytes or cardiomyocytes (HPA tissue IHC: Not detected in those cells). | Cell misidentification, cross-reactivity, or endogenous detection signal could explain the mismatch; HPA observations do not establish which cause applies (HPA tissue IHC; standard IHC practice). | Recheck morphology and controls, and seek corroboration with another validated assay before calling those cells OGA-positive (standard IHC practice). |
| Placenta appears negative despite UniProt listing high expression there (UniProt O60502 tissue specificity; HPA tissue IHC). | The statements concern different measures and cell resolution: HPA reports trophoblastic cells as Not detected in its IHC sample (HPA tissue IHC). | Record the cell type and assay with the result; use an HPA High IHC cell population as the slide-level positive comparator (HPA tissue IHC; standard IHC practice). |
| ICC-IF looks cytosolic, while tissue IHC includes nuclear staining (HPA subcellular ICC-IF; HPA tissue IHC). | The supplied HPA summaries differ by assay: supported cytosol in ICC-IF and cytoplasmic plus nuclear expression in tissue IHC (HPA subcellular ICC-IF; HPA tissue IHC). | Interpret each image against its own assay and controls; do not reject tissue nuclear staining solely because the ICC-IF summary names cytosol (HPA subcellular ICC-IF; HPA tissue IHC). |
Experiment evidence
IHC & IF images showing OGA staining
A32463 · IHCIHC analysis of MGEA5/OGA using anti-MGEA5/OGA antibody (A32463). MGEA5/OGA was detected in a paraffin-embedded section of rat spleen tissue
A32463 · IHCIHC analysis of MGEA5/OGA using anti-MGEA5/OGA antibody (A32463). MGEA5/OGA was detected in a paraffin-embedded section of human pancreas ti
A32463 · IFIF analysis of MGEA5/OGA using anti-MGEA5/OGA antibody (A32463). MGEA5/OGA was detected in an immunocytochemical section of T-47D cells. Enz
M32463 · IFImmunofluorescent analysis using the Antibody at 1:50 dilution.
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000198408-OGA/tissue/cerebral+cortex#imid_8680060
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000198408-OGA/tissue/colon#imid_8679986
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000198408-OGA/tissue/liver#imid_8679971
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000198408-OGA/tissue/kidney#imid_8679988
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA076501; green = OGA, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA076501; green = OGA, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for OGA IHC & IF
🧪Run oral mucosa first and expect its squamous epithelial cells to stain (HPA: High in oral mucosa squamous epithelial cells); use adipose tissue as a low-signal comparator (HPA: Not detected in adipocytes). Other cells on the oral mucosa slide should serve as internal background references only if they show no staining; HPA does not identify a specific internal negative cell population in that tissue (HPA: oral mucosa row).
Positive control tissue: Oral mucosa (Squamous epithelial cells, HPA High)
Negative control tissue: Adipose tissue (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show OGA in A-431, U2OS, with annotated localisation: Cytosol (supported) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only control and a nonimmune rabbit IgG isotype control matched to the primary antibody’s clonality (selected-SKU caption: rabbit primary antibody). Use OGA knockout material as a biological specificity control, and check endogenous peroxidase and endogenous biotin background when using the caption’s biotin-based chromogenic detection in oral mucosa (selected-SKU caption: biotinylated secondary, SABC and DAB).
⚠️Feasibility: A target-specific fixation window or fixation effect is unreported, and the exact selected-SKU paraffin-section caption does not state a fixative (selected-SKU caption: fixative not stated). Heat retrieval with EDTA at pH 8.0 was used for rat spleen IHC, but that example does not establish that retrieval is required for oral mucosa (selected-SKU caption: rat spleen, EDTA pH 8.0). IF/ICC images exist for A-431 and U2OS, but the supplied evidence does not establish whether IF or frozen sections are easier than paraffin IHC, or identify an oral mucosa-specific artefact (HPA: ICC-IF cell lines A-431 and U2OS; HPA: oral mucosa row).
HPA tissue IHC evidence for OGA
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low 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 |
|---|---|---|---|---|
| Oral mucosa | Squamous epithelial cells | High | Protein (IHC) | HPA → |
| Testis | Spermatogonia cells | High | Protein (IHC) | HPA → |
| Appendix | Glandular cells | Medium | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | Medium | Protein (IHC) | HPA → |
| Cerebral cortex | Neuronal cells | Medium | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Not detected | Protein (IHC) | HPA → |
| Cervix | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Epididymis | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Heart muscle | Cardiomyocytes | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced OGA IHC Tips
Troubleshoot OGA staining in paraffin sections by checking retrieval, compartment, cellular context, controls, and scoring before interpreting signal intensity.
Which retrieval conditions should I try first for weak OGA staining?
Start with heat mediated retrieval in EDTA at pH 8.0 for paraffin sections (datasheet A32463). Keep retrieval temperature and duration consistent across the test and control sections, then assess whether staining improves without tissue damage (standard IHC practice). The documented rat spleen example used this retrieval before incubation with 2 μg/ml catalog antibody overnight at 4°C (datasheet A32463). If signal remains weak, optimize heating time on adjacent sections before considering another retrieval buffer as a fallback (standard IHC practice). Compare cellular staining and background together, because stronger color alone does not establish a useful retrieval condition (standard IHC practice).
Could fixation explain inconsistent OGA staining between paraffin blocks?
The selected paraffin section caption does not state its fixative, so target specific fixation sensitivity is unknown (datasheet A32463). Record the fixative, time in fixative, processing history, and section age for each block before comparing staining (standard IHC practice). Test blocks under the same EDTA pH 8.0 retrieval and antibody incubation conditions used for the catalog example (datasheet A32463). Include sections from a single reference block in each run to reveal variation introduced during staining (standard IHC practice). If blocks differ, report that association without assigning the change to a particular fixation effect on OGA (datasheet A32463; standard IHC practice).
How should I assess nuclear versus cytoplasmic OGA staining?
Assess nuclear and cytoplasmic staining separately, because OGA is annotated in both compartments and tissue IHC reports both in most tissues (UniProt O60502; HPA tissue IHC). The HPA subcellular summary identifies cytosol as its supported main location, so nuclear color should be judged against cell morphology and controls rather than assumed universal (HPA subcellular). Use a nuclear counterstain to outline nuclei and compare signal in intact cells away from section edges (standard IHC practice). Record the percentage of cells showing each compartment pattern within the same defined cell population (standard IHC practice). Review unexpected patterns in serial sections before assigning them biological meaning (standard IHC practice).
Could an epitope difference explain discordant OGA staining?
OGA has 4 annotated isoforms, but the selected caption does not identify the antibody epitope or establish which isoforms it detects (UniProt O60502; datasheet A32463). Its GH84 domain spans residues 60–336, and phosphoserine at residue 364 is annotated (UniProt O60502). Neither fact establishes that retrieval exposes this antibody's epitope or that phosphorylation changes its staining (UniProt O60502; datasheet A32463). Check documented epitope information before comparing this reagent with another antibody, and keep the same retrieval and detection conditions during that comparison (standard IHC practice). Treat differences between reagents as unresolved until specificity is independently supported (standard IHC practice).
How can I check OGA localisation with complementary immunofluorescence?
Use IF as a complementary localisation check, since the catalog evidence supplied here describes chromogenic staining of a paraffin section (datasheet A32463). Pair OGA with a validated marker for the cell population being assessed and a nuclear stain so signals can be assigned to individual cells (standard IF practice). Choose spectrally separated fluorophores and compare unstained tissue at the intended exposure settings to identify autofluorescence (standard IF practice). OGA has no transmembrane segment and is annotated in cytoplasm and nucleus, so evaluate permeabilisation for access to intracellular epitopes (UniProt O60502; standard IF practice). Include single stain and secondary only controls when assessing overlap (standard IF practice).
What should I investigate when DAB background obscures OGA staining?
Check a section processed without primary antibody to distinguish detection system background from primary dependent staining (standard IHC practice). The documented example used 10% goat serum block, a biotinylated goat anti rabbit secondary, streptavidin biotin detection, and DAB (datasheet A32463). Include a peroxidase block before DAB detection, and assess whether endogenous biotin contributes signal when using the documented detection system (standard IHC practice). Inspect folds, tissue edges, and damaged areas before changing antibody concentration, since these can concentrate apparent color (standard IHC practice). Compare background with intact cells in the same run and document each adjustment (standard IHC practice).
How should I quantify OGA IHC across samples? ⚠ ANSWER MARKED FOR VERIFICATION
Define the tissue compartment and cell population before scoring, then use the same sampling rule across sections (standard IHC practice). An H score can combine the percentage of cells at each staining intensity, while percentage positive cells or positive cell density per mm² can answer different questions (standard IHC practice). Score nuclear and cytoplasmic OGA separately because both locations are reported for tissue staining (HPA tissue IHC; UniProt O60502). Normalize cell counts to the number of evaluable cells, or densities to measured viable tissue area, and exclude folds and necrotic regions (standard IHC practice). Keep illumination, detection, thresholds, and reference controls consistent between runs (standard IHC practice).
How can I distinguish credible OGA signal from artefact?
Look for reproducible staining in intact cells with plausible cytoplasmic or nuclear localisation, rather than color confined to edges or necrotic areas (UniProt O60502; HPA tissue IHC; standard IHC practice). HPA reports high staining in oral mucosa squamous epithelial cells and testis spermatogonia, but labels its tissue IHC reliability Approved with low consistency against RNA expression (HPA tissue IHC). Use those observations as context rather than a stand alone specificity test (HPA tissue IHC; standard IHC practice). Compare serial sections and no primary controls to identify edge effects and detection background, including endogenous enzyme activity (standard IHC practice). Investigate a pattern confined to unexpected cells or compartments with an independent specificity control before interpreting it biologically (standard IHC practice).
Boster reagents
Best OGA / Protein O-GlcNAcase IHC Antibodies
Anti-OGA A32463 has IHC images from rat spleen and human pancreas paraffin sections (A32463 IHC captions) and IF in T-47D cells (A32463 IF caption); M32463 has an IF image without sample details (M32463 IF caption).
Real IHC data
Anti-MGEA5/OGA Antibody ®
Cat # A32463
Real IF data
Anti-MGEA5 Rabbit Monoclonal Antibody
Cat # M32463
A32463 shows IHC in rat spleen and human pancreas paraffin sections and IF in T-47D cells (A32463 image captions). M32463 lists IHC and human/mouse reactivity, but its provided IF caption identifies neither a sample nor a species (M32463 catalog applications, reactivity and IF caption).
Which to pick: Choose A32463 for paraffin-section tissue IHC because its own captions document rat spleen and human pancreas staining; the fixative is unreported (A32463 IHC captions). Choose A32463 for IF/ICC because both applications are listed and its IF caption documents T-47D cells; M32463 lists IHC but has no provided IHC image caption, while its IF caption gives no sample details (A32463 catalog applications and IF caption; M32463 catalog applications and image captions). Choose A32463 when rat reactivity is needed alongside human and mouse; M32463 is a rabbit monoclonal listing human/mouse reactivity (A32463 catalog reactivity; M32463 catalog clone and reactivity).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry O60502 (OGA_HUMAN, Protein O-GlcNAcase).
- Human Protein Atlas. OGA tissue IHC expression (reliability: Approved).
- Human Protein Atlas. OGA subcellular location (ICC-IF): Localized to the cytosol..
- Human Protein Atlas. OGA antibody validation summary (2 antibodies).
- Characterization and chemoproteomic profiling of protein O-GlcNAcylation in SOD1-G93A mouse model. Molecular medicine (Cambridge, Mass.) 2025 — PMC11871760.
- O-GlcNAcase promotes dendritic spine morphogenesis while downregulating their GluA2-containing AMPA receptors. The Journal of biological chemistry 2026 — PMC12914425.
- Detection of O-Linked-N-Acetylglucosamine Modification and Its Associated Enzymes in Human Degenerated Intervertebral Discs. Asian spine journal 2017 — PMC5738306.
- Traditional herbal formula Wu-Mei-Wan alleviates TNBS-induced colitis in mice by inhibiting necroptosis through increasing RIPK3 O-GlcNAcylation. Chinese medicine 2021 — PMC8365910.
- PubMed PMID:9811929 — UniProt-cited evidence.
- PubMed PMID:11341771 — UniProt-cited evidence.
- PubMed PMID:11148210 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for OGA (Protein O-GlcNAcase). Expected localisation Cytoplasmic and nuclear staining in most tissues (HPA tissue IHC). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet A32463). Validated IHC antibody: A32463 at 2 μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Oral mucosa (Squamous epithelial cells); negative Adipose tissue. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded rat spleen tissue; fixative not specified (datasheet A32463); 2. Fixation: Image fixative and duration unreported (datasheet A32463); 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 A32463); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet A32463); 8. Primary antibody: Rabbit anti-OGA, 2 μg/ml (datasheet A32463); 9. Primary incubation: Overnight at 4 °C (datasheet A32463). Watch for: Fixation: Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A32463); Caveat: Staining shows low consistency with RNA expression (HPA tissue IHC); Isoform / epitope: 4 isoforms; check epitope coverage across variants (UniProt); Regulation: No staining-linked regulator reported (UniProt). Evidence: UniProt O60502, HPA tissue IHC · Approved, HPA ICC-IF · cytosol., Datasheet A32463, PMC11871760. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/OGA/immunohistochemistry-ihc-guide.