7-50463247-C-G

Variant names:

• chr7-50463247-C-G
• rs769418481
• NM_001082971.2:c.1427G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001082971.2(DDC):​c.1427G>C​(p.Arg476Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,244 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: DDC NM_001082971.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.810

Genes affected

DDC (HGNC:2719): (dopa decarboxylase) The encoded protein catalyzes the decarboxylation of L-3,4-dihydroxyphenylalanine (DOPA) to dopamine, L-5-hydroxytryptophan to serotonin and L-tryptophan to tryptamine. Defects in this gene are the cause of aromatic L-amino-acid decarboxylase deficiency (AADCD). AADCD deficiency is an inborn error in neurotransmitter metabolism that leads to combined serotonin and catecholamine deficiency. Multiple alternatively spliced transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Jun 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.102226436).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DDC	NM_001082971.2	c.1427G>C	p.Arg476Pro	missense_variant	Exon 14 of 15	ENST00000444124.7	NP_001076440.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DDC	ENST00000444124.7	c.1427G>C	p.Arg476Pro	missense_variant	Exon 14 of 15	1	NM_001082971.2	ENSP00000403644.2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152244 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152244 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74390

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	0.024
DANN	Benign	0.71
DEOGEN2	Benign	0.16	T;.;T;.;.;.;T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.056	N
LIST_S2	Benign	0.81	.;T;T;T;.;T;T
M_CAP	Benign	0.0082	T
MetaRNN	Benign	0.10	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L;.;.;.;.;.;L
PrimateAI	Benign	0.21	T
PROVEAN	Benign	-0.97	N;.;.;.;N;N;N
REVEL	Benign	0.12
Sift	Benign	0.036	D;.;.;.;D;D;D
Sift4G	Benign	0.19	T;T;T;T;T;T;T
Polyphen		0.32	B;.;.;.;.;.;B
Vest4		0.19
MutPred		0.39		Loss of MoRF binding (P = 0.0219);.;.;.;.;.;Loss of MoRF binding (P = 0.0219);
MVP		0.25
MPC		0.46
ClinPred		0.13	T
GERP RS		-7.7
Varity_R		0.51
gMVP		0.87

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

LitVar

Other links and lift over

dbSNP: rs769418481; hg19: chr7-50530945;