TRNT1 / CCA tRNA nucleotidyltransferase 1, mitochondrial · IHC design guide

Design Immunohistochemistry for TRNT1

Plan TRNT1 staining in paraffin sections using the catalog antibody’s 2–5 μg/ml IHC range (datasheet A06030-1). This guide covers the reported nuclear and cytoplasmic tissue pattern and its uncertain reliability when interpreting staining (HPA tissue IHC).

Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use

Immunohistochemistry protocol sheet for TRNT1 (IHC for TRNT1): expected localisation Nuclear/cytoplasmic staining, uncertain (HPA tissue IHC), antibody A06030-1, validated IHC image, and IHC protocol steps — Printable **TRNT1** IHC protocol sheet — expected localisation Nuclear/cytoplasmic staining, uncertain (HPA tissue IHC), antibody A06030-1, controls and protocol steps. Open the full TRNT1 IHC guide →

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TRNT1 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	Nuclear/cytoplasmic staining, uncertain (HPA tissue IHC)
	Staining pattern	Nuclear and cytoplasmic staining across cell types (HPA tissue IHC)
	Antigen retrieval	EDTA pH 8.0 HIER, heat-mediated (datasheet A06030-1)
	Positive control ⓘ	Adipose tissue+4 more · see all
	Negative control ⓘ	Skeletal muscle

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	Tissue staining has uncertain reliability (HPA tissue IHC)
	Regulation	Staining varies by cell type (HPA tissue IHC)
	Isoform / epitope	3 isoforms; epitope coverage is unreported (UniProt)

Section 1

Recommended TRNT1 IHC & IF Protocols

Compare the catalog antibody’s IHC-P protocol with a published TRNT1 tissue microarray protocol (PMC12464730).

Recommended immunohistochemistry (IHC-P) protocol parameters
Sample	Paraffin-embedded human liver cancer tissue; fixative not specified (datasheet A06030-1)
Fixation	Image fixative and duration unreported (datasheet A06030-1); 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 A06030-1); 20 min, 95–100 °C (standard)
Peroxidase block	3% H2O2, 10 min, room temperature (standard)
Blocking	10% goat serum (datasheet A06030-1)
Primary antibody	Rabbit anti-TRNT1, 2-5 μg/ml (datasheet A06030-1)
Primary incubation	Overnight at 4 °C (datasheet A06030-1)
Detection	HRP-conjugated secondary, DAB chromogen (datasheet A06030-1)
Counterstain	Hematoxylin, blue, dehydrate and mount (standard)
Expected result	TRNT1-positive staining in adipocytes of adipose tissue (HPA tissue IHC: Medium). HPA tissue profile: General nuclear and cytoplasmic expression. No signal in the no-primary control.

💡Decision noteStart with heat-mediated EDTA pH 8.0 retrieval for the catalog antibody (datasheet A06030-1). The published protocol does not specify retrieval (PMC12464730).

Section 2

What Is the Expected TRNT1 Staining Pattern?

TRNT1 is reported in mitochondria, cytoplasm and nucleus and has no transmembrane segment (UniProt Q96Q11). In paraffin sections, expect nuclear and cytoplasmic staining in several cell types, including adipocytes and glandular cells (HPA tissue IHC: general nuclear and cytoplasmic expression; Medium in these cells). Treat compartment calls cautiously: tissue IHC reliability is Uncertain, with subcellular location contradicted by external data (HPA tissue IHC).

What am I looking at on my slide?
Moderate nuclear and cytoplasmic staining in adipocytes or glandular cells.	This matches the reported tissue pattern and Medium staining in these cells (HPA tissue IHC). Score the identified cells and compartments separately; the Uncertain reliability rating limits how confidently this establishes TRNT1 localisation (HPA tissue IHC).
Crisp staining confined to cell borders, with little intracellular signal.	An exclusively border-like pattern conflicts with the reported nuclear and cytoplasmic tissue pattern and with TRNT1 lacking a transmembrane segment (HPA tissue IHC; UniProt Q96Q11 topology). Check morphology and detection controls before treating it as specific.
Strong staining in skeletal muscle myocytes.	This differs from the HPA observation of Not detected in these cells (HPA tissue IHC). Consider cross-reactivity or endogenous detection activity, but do not call the tissue universally negative: TRNT1 RNA has low tissue specificity (HPA tissue IHC).
Uniform chromogen across cells, stroma and empty spaces.	That distribution is difficult to reconcile with cell-associated nuclear and cytoplasmic staining (HPA tissue IHC). Assess background with an appropriate negative detection control, then review blocking, washing and chromogen development as general IHC workflow checks.
No cellular signal in adipocytes or glandular cells expected to stain.	HPA reports Medium staining in adipocytes and glandular cells, so an entirely blank result warrants a technical check (HPA tissue IHC). Confirm tissue identity and run conditions with a positive control before interpreting the absence biologically.

💡Expected TRNT1 appearanceA plausible positive IHC result is cell-associated, moderate nuclear and cytoplasmic staining in HPA-positive cells such as adipocytes or glandular cells (HPA tissue IHC: Medium; general nuclear and cytoplasmic expression); uniform extracellular colour or border-only staining warrants scrutiny (HPA tissue IHC; UniProt Q96Q11 topology).

How each factor affects the staining
Tissue and cell context	HPA reports Medium staining in adipocytes, glandular cells, respiratory epithelial cells, glial cells and endothelial cells, but Not detected in skeletal muscle myocytes (HPA tissue IHC). Use the identified cell population when judging a section.
Compartment evidence	Tissue IHC reports general nuclear and cytoplasmic expression with Uncertain reliability; ICC-IF supports mitochondria (HPA tissue IHC; HPA subcellular). Do not require a visibly mitochondrial pattern in chromogenic paraffin IHC.
Antibody validation	The listed antibody HPA036938 is rated Uncertain for IHC and Supported for ICC (HPA antibodies). A positive IHC pattern therefore needs appropriate tissue and detection controls before it is assigned to TRNT1.
Isoforms and processing	UniProt lists three isoforms and a chain spanning residues 42–434 (UniProt Q96Q11). The supplied evidence gives no antibody epitope, so it cannot predict which forms contribute to staining or justify an epitope-specific retrieval choice.
IF/ICC Q&A: Should IF show the same pattern?	HPA supports mitochondrial localisation in ICC-IF images from A-431 and U2OS, while tissue IHC reports nuclear and cytoplasmic expression with Uncertain reliability (HPA subcellular; HPA tissue IHC). Evaluate each application against its own evidence.
Fixation sensitivity	Target-specific fixation effects are unreported in the supplied UniProt and HPA records. If signal is weak, review fixation and antigen retrieval as general IHC workflow variables; do not infer a TRNT1-specific masking effect.

Why is my staining missing, weak or wrong?
Situation	Likely cause	Next action
No staining in an expected positive cell population	The run may have failed, or the sampled population may differ from the HPA example (HPA tissue IHC: Medium in adipocytes and glandular cells).	Verify cell identity, positive-control performance and detection reagents; review the validated IHC procedure, including retrieval and antibody dilution, without assuming a TRNT1-specific fixation effect.
Strong myocyte staining	This disagrees with the HPA skeletal-muscle observation and may reflect nonspecific antibody binding or endogenous detection activity (HPA tissue IHC: myocytes Not detected).	Compare with a negative detection control and inspect the cell type and signal distribution; repeat with controlled detection conditions before reporting a new positive pattern.
Staining appears only along cell borders	Border-only signal does not fit the reported nuclear and cytoplasmic tissue pattern or the absence of a transmembrane segment (HPA tissue IHC; UniProt Q96Q11 topology).	Check section morphology, counterstain and negative controls; score intracellular signal separately from edge staining.
Diffuse colour obscures nuclei and cytoplasm	Background may arise from general staining or detection conditions; uniform colour is unlike the reported cell-associated pattern (HPA tissue IHC).	Use a negative detection control, then review blocking, washing and chromogen development; reassess whether individual cells and compartments remain distinguishable.
Nuclear IHC signal seems inconsistent with mitochondrial IF	The applications have different reported patterns: tissue IHC is nuclear and cytoplasmic with Uncertain reliability, while ICC-IF supports mitochondria (HPA tissue IHC; HPA subcellular).	Record the application and compartment for each observation; evaluate IHC with tissue controls and avoid treating the ICC-IF result as proof of an IHC artefact.
Signal varies among cells in the same section	HPA reports different staining levels across cell populations, including Low and Medium examples (HPA tissue IHC). Cell mixture can change the apparent intensity of a field.	Identify and score each cell population separately, compare like cells across sections, and document any result that departs from the HPA examples.

Source: UniProt Q96Q11 Human Protein Atlas tissue Human Protein Atlas subcellular

Experiment evidence

IHC & IF images showing TRNT1 staining

IHC analysis of TRNT1 using anti-TRNT1 antibody (A06030-1). TRNT1 was detected in a paraffin-embedded section of human liver cancer tissue. Heat mediated antigen retrieval was performed in EDTA buffer (pH 8.0, epitope retrieval solution). The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 2 μg/ml rabbit anti-TRNT1 Antibody (A06030-1) overnight at 4°C. Peroxidase Conjugated Goat Anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37°C. The tissue section was developed using HRP Conjugated Rabbit IgG Super Vision Assay Kit (Catalog # SV0002) with DAB as the chromogen.

A06030-1 · IHCIHC analysis of TRNT1 using anti-TRNT1 antibody (A06030-1). TRNT1 was detected in a paraffin-embedded section of human liver cancer tissue.

IHC analysis of TRNT1 using anti-TRNT1 antibody (A06030-1). TRNT1 was detected in a paraffin-embedded section of human lung cancer tissue. Heat mediated antigen retrieval was performed in EDTA buffer (pH 8.0, epitope retrieval solution). The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 2 μg/ml rabbit anti-TRNT1 Antibody (A06030-1) overnight at 4°C. Peroxidase Conjugated Goat Anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37°C. The tissue section was developed using HRP Conjugated Rabbit IgG Super Vision Assay Kit (Catalog # SV0002) with DAB as the chromogen.

A06030-1 · IHCIHC analysis of TRNT1 using anti-TRNT1 antibody (A06030-1). TRNT1 was detected in a paraffin-embedded section of human lung cancer tissue. H

HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000072756-TRNT1/tissue/cerebral+cortex#imid_9728979

HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000072756-TRNT1/tissue/colon#imid_9728889

HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000072756-TRNT1/tissue/liver#imid_9728906

HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000072756-TRNT1/tissue/kidney#imid_9728891

HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA036938; green = TRNT1, blue = nucleus, red = microtubules.

← swipe / scroll for more images →

Real IHC / IF data behind the staining-pattern expectations in this section.

Sample controls for TRNT1 IHC & IF

🧪Run adipose tissue first and score adipocytes for TRNT1 staining (HPA: Medium in adipocytes); use skeletal muscle myocytes as the negative tissue (HPA: Not detected in myocytes). On the adipose slide, cells without specific staining should show counterstain alone; do not presume that non-adipocytes are TRNT1-negative because the supplied HPA row reports only adipocytes (HPA: Medium in adipocytes).

Positive control tissue: Adipose tissue (Adipocytes, HPA Medium)

Negative control tissue: Skeletal muscle (HPA Not detected)

ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show TRNT1 in A-431, U2OS, with annotated localisation: Mitochondria (supported) (HPA subcellular).

Technical controls: Include a no-primary (secondary-only) section, a concentration-matched rabbit IgG isotype control, and a TRNT1-knockout biological control where available (selected-SKU caption: rabbit primary antibody). Block endogenous peroxidase before chromogenic detection and compare control sections for background signal (selected-SKU caption: HRP/DAB detection).

⚠️Feasibility: A target-specific fixation window or fixation effect is unreported, and the exact selected-SKU tissue-IHC caption does not state a fixative (selected-SKU caption: fixative not stated). Heat retrieval in EDTA at pH 8.0 was used, but retrieval dependency is unreported (selected-SKU caption: heat-mediated EDTA retrieval). The supplied evidence does not establish whether frozen sections or IF are easier; in adipose sections, lipid-extraction spaces should not be scored as negative cells (HPA: Medium in adipocytes; standard histology practice).

HPA tissue IHC evidence for TRNT1

Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Uncertain — Medium consistency between antibody staining and RNA expression data. Subcellular location is contradicted by external 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
Adipose tissue	Adipocytes	Medium	Protein (IHC)	HPA →
Adrenal gland	Glandular cells	Medium	Protein (IHC)	HPA →
Appendix	Glandular cells	Medium	Protein (IHC)	HPA →
Breast	Adipocytes	Medium	Protein (IHC)	HPA →
Bronchus	Respiratory epithelial cells	Medium	Protein (IHC)	HPA →

Undetected expression · recommended negative controls

Tissue	Cell type	Level	Evidence	Source
Skeletal muscle	Myocytes	Not detected	Protein (IHC)	HPA →

Section 3

Advanced TRNT1 IHC Tips

Troubleshoot TRNT1 chromogenic IHC in paraffin sections using the selected antibody’s tissue protocol and compartment-specific interpretation.

Which retrieval conditions should I start with for TRNT1 in paraffin sections?

Start with heat-mediated antigen retrieval in EDTA pH 8.0 (datasheet A06030-1). The selected paraffin-section image used this retrieval before 2 μg/ml primary antibody overnight at 4°C, providing a directly matched starting workflow (datasheet A06030-1). If staining is weak, compare controlled changes in heating duration on adjacent sections while keeping antibody concentration and detection constant (standard IHC practice). Include a section processed without primary antibody to assess detection background, and compare cellular distribution as well as signal intensity (standard IHC practice). Do not treat stronger nuclear staining alone as successful retrieval: mitochondrial localisation is supported, while tissue staining also includes nuclear and cytoplasmic signal (HPA subcellular; HPA tissue IHC).

Could fixation explain weak or uneven TRNT1 staining?

The selected paraffin-section caption does not state its fixative, so target-specific TRNT1 sensitivity to fixation is unknown (datasheet A06030-1). Record the actual fixative, fixation duration, section thickness and storage conditions for each specimen before comparing staining (standard IHC practice). When possible, stain adjacent sections from the same processing batch with EDTA pH 8.0 retrieval and 2 μg/ml primary antibody overnight at 4°C (datasheet A06030-1). Uneven staining that tracks folds, edges or poorly preserved areas calls for a morphology and processing review before changing antibody concentration (standard IHC practice). Neither TRNT1 topology nor tissue-expression patterns establish a fixation-specific effect (UniProt Q96Q11; HPA tissue IHC).

How should I evaluate nuclear staining when TRNT1 is mitochondrial?

Assess mitochondrial-pattern cytoplasmic staining first, because mitochondrial localisation is supported by cellular imaging (HPA subcellular). UniProt also lists cytoplasm and nucleus, and tissue IHC reports general nuclear and cytoplasmic expression, so nuclear signal merits evaluation rather than automatic rejection (UniProt Q96Q11; HPA tissue IHC). Compare 2 compartments separately within morphologically intact cells and record whether nuclear staining persists across nearby sections (standard IHC practice). Use a no-primary control to identify chromogen or detection-system background, then check whether staining follows tissue edges or damaged areas (standard IHC practice). The tissue IHC reliability is uncertain because its subcellular pattern conflicts with external data; avoid assigning nuclear signal to TRNT1 without orthogonal support (HPA tissue IHC).

Can this antibody distinguish TRNT1 isoforms or processing states in tissue?

TRNT1 has 3 annotated isoforms, but the supplied antibody caption gives no epitope sequence or isoform selectivity (UniProt Q96Q11; datasheet A06030-1). Its annotated processed chain spans residues 42–434; staining alone cannot establish which molecular form is present (UniProt Q96Q11; standard IHC practice). Phosphoserine 400 and acetyllysine 402 are annotated, but no evidence here shows that either modification alters this antibody’s tissue staining (UniProt Q96Q11; datasheet A06030-1). Keep retrieval and primary concentration fixed across comparison sections, and use an independently characterised reagent or genetic control if isoform identity matters (standard IHC practice). Report the result as TRNT1 immunoreactivity unless the antibody’s epitope and selectivity are established (standard IHC practice).

How can IF help resolve an ambiguous TRNT1 IHC pattern?

Use IF as a separate localisation check: cellular imaging supports mitochondrial TRNT1 and includes A-431 and U2OS images (HPA subcellular). In tissue, multiplex TRNT1 with a mitochondrial marker and a marker identifying the cell population being scored, then compare signal within those cells (HPA subcellular; standard IF practice). Select a fluorophore channel with low tissue autofluorescence and include single-stain and no-primary controls before judging overlap (standard IF practice). Because the epitope’s membrane-facing side is unspecified and TRNT1 has no annotated transmembrane segment, pilot permeabilisation such as 0.1% Triton X-100 for 5 minutes alongside a gentler condition (UniProt Q96Q11; standard IF practice). Do not transfer the paraffin-section retrieval or fixation assumptions directly into IF (datasheet A06030-1; standard IF practice).

What should I change when DAB staining is widespread?

First compare the stained section with a no-primary control to separate antibody-dependent signal from detection or tissue background (standard IHC practice). The selected workflow uses 10% goat serum blocking, 2 μg/ml primary overnight at 4°C, a peroxidase-conjugated secondary for 30 minutes at 37°C, and DAB (datasheet A06030-1). Add an endogenous peroxidase block and control DAB development time as general chromogenic IHC measures, especially when background appears without primary antibody (standard IHC practice). If background requires the primary antibody, compare a lower concentration on adjacent sections while preserving identical retrieval and exposure conditions (standard IHC practice). Judge any improvement against intact-cell localisation, since diffuse colour alone does not establish TRNT1 specificity (HPA subcellular; standard IHC practice).

How should I score TRNT1 staining across paraffin sections? ⚠ ANSWER MARKED FOR VERIFICATION

Define the cell population and compartment before scoring, because tissue IHC reports nuclear and cytoplasmic expression while cellular imaging supports mitochondria (HPA tissue IHC; HPA subcellular). For each compartment, record the percentage of positive cells and intensity on a 0–3 scale, or calculate an H-score from percentage at each intensity (standard IHC practice). Normalise counts to the number of evaluable cells; for spatial counts, report positive cells per mm² of viable tissue (standard IHC practice). Apply identical retrieval, antibody concentration, DAB development and counterstain settings across compared sections (standard IHC practice). Record excluded necrotic or folded regions and analyse nuclear and cytoplasmic scores separately, given the uncertain reliability of the tissue IHC pattern (HPA tissue IHC; standard IHC practice).

Which staining patterns support genuine TRNT1 signal rather than artefact?

Look for reproducible staining in intact cells, with a cytoplasmic pattern compatible with supported mitochondrial localisation (HPA subcellular; standard IHC practice). Nuclear or diffuse cytoplasmic staining needs caution: both occur in tissue IHC, whose reliability is marked uncertain because subcellular location conflicts with external data (HPA tissue IHC). Compare the relevant cell population with the available tissue context, such as medium staining in adipocytes and no detected staining in skeletal-muscle myocytes, without treating either as a universal control (HPA tissue IHC). Exclude section edges, folds and necrotic areas, and check a no-primary section for endogenous peroxidase or DAB background (standard IHC practice). Require concordance across 2 independent checks, such as a second reagent and a genetic control, before assigning an unexpected compartment to TRNT1 (standard IHC practice).

Boster reagents

Best TRNT1 / CCA tRNA nucleotidyltransferase 1, mitochondrial IHC Antibodies

The IHC-validated antibody has real staining data from human paraffin-embedded tissue sections (catalog IHC image captions). No IF/ICC data are supplied (catalog applications and image captions).

Real IHC data

Anti-TRNT1 Antibody ®

Cat # A06030-1

View product →

A06030-1 is a human-reactive rabbit polyclonal antibody listed for IHC (catalog: reactivity, host, clonality, applications). Its IHC captions show paraffin-embedded human liver cancer, lung cancer, rectum adenocarcinoma, and invasive bladder urothelial carcinoma sections (catalog IHC image captions).

Which to pick: Choose A06030-1 for human paraffin-section IHC; its figure shows staining in human liver cancer tissue, with the fixative unreported (A06030-1 IHC figure caption). No SKU in the payload is validated for IF/ICC or cross-species use (catalog: applications, reactivity, IF image captions).

Each figure is that product's own IHC / IF validation image from its datasheet.

References

UniProt Consortium. UniProt entry Q96Q11 (TRNT1_HUMAN, CCA tRNA nucleotidyltransferase 1, mitochondrial).
Human Protein Atlas. TRNT1 tissue IHC expression (reliability: Uncertain).
Human Protein Atlas. TRNT1 subcellular location (ICC-IF): Localized to the mitochondria..
Human Protein Atlas. TRNT1 antibody validation summary (1 antibodies).
Comprehensive Pan-Cancer Analysis of TRNT1 as a Potential Biomarker for Breast Cancer. Journal of cellular and molecular medicine 2025 — PMC12464730.
PubMed PMID:11504732 — UniProt-cited evidence.
PubMed PMID:10810093 — UniProt-cited evidence.
PubMed PMID:14702039 — UniProt-cited evidence.