# NM_000796.6(DRD3):c.-252C>T

https://sugi.bio/variant/drd3-c-minus-252c-t

## Summary

**DRD3 c.-252C>T** is classified **Likely benign** in DRD3 (ClinVar, Single submitter, 1 submitter; last evaluated 2018-01-12). Low-frequency (popmax 2.76%, sas); Associated with tremor, hereditary essential, 1.

**At a glance:** Likely benign · review: Single submitter · rsID rs36211803 · 1 submitter · 1 linked condition · low-frequency (popmax 2.76%, sas)

## For patients & families {#patients}

This is a change in the DRD3 gene that is classified as likely benign — not considered disease-causing, submitted by 1 submitter, and is linked to tremor, hereditary essential, 1.

*Reference information, not medical advice, and not a prediction for any individual. A genetic counselor or clinician can interpret what it means for you and your family.*

|  |  |
| --- | --- |
| Clinical trials | 1 registered for this condition — see ClinicalTrials.gov |

**Support & next steps:** [Find a genetic counselor (NSGC)](https://findageneticcounselor.nsgc.org/).

## Identity {#identity}

| Field | Value |
| --- | --- |
| Gene | [DRD3](https://sugi.bio/atlas/gene/DRD3/) |
| Coding change (HGVS c.) | c.-252C>T |
| MANE Select transcript | [NM_000796](https://www.ncbi.nlm.nih.gov/nuccore/NM_000796) |
| dbSNP | [rs36211803](https://www.ncbi.nlm.nih.gov/snp/rs36211803/) |
| Variant type | single nucleotide variant |
| Location | chr3:114178873-114178873 (GRCh38) |
| ClinVar | [VCV342608](https://www.ncbi.nlm.nih.gov/clinvar/variation/342608/) |

**All HGVS expressions:** `NC_000003.11:g.113897720G>A`, `NC_000003.12:g.114178873G>A`, `NG_008842.2:g.25535C>T`, `NM_000796.6:c.-252C>T`, `NM_001282563.2:c.-155-97C>T`, `NM_033663.6:c.-252C>T`

## Computational & population evidence {#evidence}

**Concordance:** Mixed / partial computational evidence (see below).

- **Missense predictors (AlphaMissense/REVEL/SaProt) do not apply** to this variant type — they score amino-acid substitutions only. For non-missense variants the computational signal comes from conservation (below), not from a missing predictor score.
- Conservation: phyloP 4.28, GERP 1.9, phastCons 1 — highly conserved position (PP3-type support)
- CADD: **PHRED 14.78**. No single ClinGen-calibrated threshold exists and the expert panels that use CADD disagree — GUCY2D/AIPL1 require ≥ 20.0 for an untranslated-region variant, ABCA4 ≥ 28.1 for a synonymous or indel variant, the Pulmonary Hypertension panel imports Pejaver 2022's missense-calibrated numbers, and the Antibody Deficiencies panel declines CADD entirely for PIK3CD. CADD v1.7 also incorporates Zoonomia phyloP, so it partly re-expresses the conservation above. *Descriptive; no threshold applied.*
- Non-coding constraint (Gnocchi): **Z 0.01**, o/e 1.00 (1 kb window 114,178,000–114,179,000). A higher Z means the window carries less variation than expected. Describes the 1 kb window, not this allele. No ClinGen expert panel references Gnocchi and no ACMG-calibrated threshold exists for it. *Descriptive; no cut-point applied.*
- SpliceAI: **not assessed** — no allele at this position is in our SpliceAI release, either because it lies outside the scored MANE transcript scope or because every allele is below Δ0.2. We cannot tell which, so this claims neither; absence is not evidence against a splicing effect.
- Population frequency (gnomAD v4.1): grpmax **2.76%** (sas) · FAF95 2.37% · FAF99 2.23% · 133/4,826 in the highest group · 402/152,250 alleles overall — low-frequency (popmax 2.76%, sas).

| Ancestry group | Allele frequency | 1 in |
| --- | --- | --- |
| South Asian (grpmax) | 2.76% | 36 |
| Middle Eastern | 0.68% | 147 |
| Remaining individuals (not grpmax-eligible) | 0.474% | 211 |
| European (non-Finnish) | 0.3% | 333 |
| Ashkenazi Jewish (not grpmax-eligible) | 0.288% | 347 |
| Admixed American | 0.118% | 849 |
| Finnish (not grpmax-eligible) | 0.0472% | 2,120 |
| African / African-American | 0.0457% | 2,186 |
| East Asian | 0.0193% | 5,186 |

*Computational predictors are not independent (ClinGen Variant Classification guidance): AlphaMissense (Cheng et al. 2023) carries the ACMG weight for missense and conservation (phyloP/GERP/phastCons) for non-missense; REVEL (Pejaver-2022 calibrated strength bands) and SaProt (Su et al. 2023, structure-aware, ClinVar-independent protein language model, raw LLR) are shown as orthogonal agreement signals, not additive. For frequency, the gnomAD v4.1 grpmax filtering allele frequency (FAF95) is ClinGen's designated BA1/BS1 input (gnomAD v4 guidance v3.0, June 2025); BA1/BS1 thresholds are disease-specific, not a blanket 5%. Predictions, not a clinical determination.*

## Gene constraint & dosage {#gene-context}

**DRD3** population constraint: LOEUF 0.604, pLI 0.65813, missense-Z 1.0876. *Lower LOEUF and higher pLI indicate a gene that tolerates loss-of-function poorly; ClinGen dosage is the curated haploinsufficiency call.*

## Protein context {#protein}


AlphaFold model confidence (whole protein): pLDDT 75.70, 47% of residues very-high.

**9 experimental structure(s)** (PDB): [3PBL](https://www.rcsb.org/structure/3PBL), [7CMU](https://www.rcsb.org/structure/7CMU), [7CMV](https://www.rcsb.org/structure/7CMV), [8IRT](https://www.rcsb.org/structure/8IRT), [9F33](https://www.rcsb.org/structure/9F33), [9F34](https://www.rcsb.org/structure/9F34).

## What this gene does {#gene-function}

*Describes the biological roles of DRD3 (the gene this variant disrupts) — not effects measured for this specific variant. A damaging variant is expected to affect these functions and pathways; the degree depends on the variant.*

**How this variant is thought to act:** DRD3's established molecular role includes dopamine neurotransmitter receptor activity, coupled via Gi/Go.


### Pathways affected {#pathways}

DRD3 participates in **2 Reactome pathways** (⚕ = disease pathway):

| Pathway (Reactome) | Evidence |
| --- | --- |
| [Dopamine receptors](https://reactome.org/content/detail/R-HSA-390651) | curated |
| [G alpha (i) signalling events](https://reactome.org/content/detail/R-HSA-418594) | curated |

### Molecular function & processes (GO — experimentally supported) {#go}

**Molecular function:** dopamine neurotransmitter receptor activity, coupled via Gi/Go.

**Biological process:** G protein-coupled receptor internalization, intracellular calcium ion homeostasis, G protein-coupled receptor signaling pathway, adenylate cyclase-activating dopamine receptor signaling pathway, adenylate cyclase-inhibiting dopamine receptor signaling pathway, positive regulation of cytokinesis.

## Clinical significance {#significance}

**Likely benign** — review status Single submitter *(criteria provided, single submitter)*, last evaluated 2018-01-12.

**Submitter consensus:** unanimous (1/1 Likely benign).

### Submitter classifications {#submitters}

| Submitter | Classification | Review | Method | Date |
| --- | --- | --- | --- | --- |
| Illumina Laboratory Services, Illumina | Likely benign | criteria provided, single submitter | clinical testing | 2018-01-12 |

## Associated conditions {#conditions}

[tremor, hereditary essential, 1](https://sugi.bio/atlas/disease/tremor-hereditary-essential-1/).

**Reported phenotype names (ClinVar):** Tremor, hereditary essential, 1, Familial essential tremor.

## Similar variants {#similar}

Related DRD3 variant pages (same residue, condition, or type): [DRD3 c.-105G>A](/variant/drd3-c-minus-105g-a), [DRD3 c.-333G>A](/variant/drd3-c-minus-333g-a), [DRD3 p.Ala17=](/variant/drd3-p-ala17), [DRD3 p.Ala38Thr](/variant/drd3-p-ala38thr), [DRD3 p.Gln240=](/variant/drd3-p-gln240), [DRD3 p.Gln329=](/variant/drd3-p-gln329), [DRD3 p.Gly9Ser](/variant/drd3-p-gly9ser), [DRD3 p.His359=](/variant/drd3-p-his359).

### Data sources & attribution {#sources}

ClinVar (NCBI — public domain, built 2026-10-11); gnomAD v4.1 (Broad Institute, built 2026-10-06); AlphaMissense (Cheng et al. 2023, © Google DeepMind — CC BY 4.0, built 2026-01-27); REVEL (Ioannidis et al. 2016 — ODbL, built 2026-07-13); SaProt (Su et al. 2023 — MIT, built 2026-07-14); SpliceAI (Illumina — free for non-commercial use, built 2026-10-13); CADD (Rentzsch et al. 2019, University of Washington — free for non-commercial use, built 2026-10-10); Conservation (phyloP/phastCons/GERP) (UCSC hg38 470-way mammal (Hiller Lab) + Ensembl Compara, built 2026-07-12); gnomAD Non-coding Constraint (Gnocchi) (Chen et al. 2024, Broad Institute — CC0, built 2026-10-11); gnomAD Regional Missense Constraint (Broad Institute — CC0, built 2026-10-13); Pangolin (Zeng & Li 2022 — CC BY 4.0, built 2026-10-11); Repeat regions (UCSC — RepeatMasker, TRF, segmental duplications, built 2026-10-11); ClinGen (ClinGen, built 2026-09-22); UniProt (CC BY 4.0); Reactome / GO (CC BY 4.0, built 2026-09-23); MaveDB (per-record license, built 2026-10-11); CIViC (CC0, built 2026-09-22); Orphanet (Orphanet, built 2026-06-12)

*Primary record: NCBI ClinVar (variation 342608). Classifications reflect these databases as of the page's build date and may change. Free reference use — not medical advice; consult the primary submitters and a clinician.*