3-114139694-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000796.6(DRD3):c.529G>A(p.Asp177Asn) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000000684 in 1,461,298 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DRD3 NM_000796.6 missense, splice_region
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.61

Genes affected

DRD3 (HGNC:3024): (dopamine receptor D3) This gene encodes the D3 subtype of the five (D1-D5) dopamine receptors. The activity of the D3 subtype receptor is mediated by G proteins which inhibit adenylyl cyclase. This receptor is localized to the limbic areas of the brain, which are associated with cognitive, emotional, and endocrine functions. Genetic variation in this gene may be associated with susceptibility to hereditary essential tremor 1. Alternative splicing of this gene results in transcript variants encoding different isoforms, although some variants may be subject to nonsense-mediated decay (NMD). [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32536373).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DRD3	NM_000796.6	c.529G>A	p.Asp177Asn	missense_variant, splice_region_variant	5/7	ENST00000383673.5
DRD3	NM_001282563.2	c.529G>A	p.Asp177Asn	missense_variant, splice_region_variant	6/8
DRD3	NM_001290809.1	c.529G>A	p.Asp177Asn	missense_variant, splice_region_variant	6/8
DRD3	NM_033663.6	c.529G>A	p.Asp177Asn	missense_variant, splice_region_variant	5/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DRD3	ENST00000383673.5	c.529G>A	p.Asp177Asn	missense_variant, splice_region_variant	5/7	1	NM_000796.6	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461298 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 726932

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 31, 2024

The c.529G>A (p.D177N) alteration is located in exon 5 (coding exon 4) of the DRD3 gene. This alteration results from a G to A substitution at nucleotide position 529, causing the aspartic acid (D) at amino acid position 177 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
Cadd	Benign	22
Dann	Uncertain	1.0
Eigen	Uncertain	0.20
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.33	T;T;T;T
MetaSVM	Benign	-0.98	T
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-2.9	D;D;D;D
REVEL	Benign	0.098
Sift	Benign	0.14	T;T;T;T
Sift4G	Benign	0.12	T;T;T;T
Polyphen		0.029	.;.;B;.
Vest4		0.31
MutPred		0.39		Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);
MVP		0.86
MPC		0.52
ClinPred		0.99	D
GERP RS		5.1
gMVP		0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-113858541; COSMIC: COSV105890647;