7-50493846-G-C

Variant names:

• chr7-50493846-G-C
• rs7790758
• NM_001082971.2:c.944+1504C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001082971.2(DDC):​c.944+1504C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 30)
• Consequence: DDC NM_001082971.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.338
• Publications: 6 publications found

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]

DDC Gene-Disease associations (from GenCC):

• aromatic L-amino acid decarboxylase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001082971.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDC	NM_001082971.2	MANE Select	c.944+1504C>G		intron	N/A	NP_001076440.2
	DDC	NM_000790.4		c.944+1504C>G		intron	N/A	NP_000781.2
	DDC	NM_001242886.2		c.830+1504C>G		intron	N/A	NP_001229815.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDC	ENST00000444124.7	TSL:1 MANE Select	c.944+1504C>G		intron	N/A	ENSP00000403644.2
	DDC	ENST00000357936.9	TSL:1	c.944+1504C>G		intron	N/A	ENSP00000350616.5
	DDC	ENST00000380984.4	TSL:1	c.945-841C>G		intron	N/A	ENSP00000370371.4

Frequencies

GnomAD3 genomes Cov.: 30

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	0.58
DANN	Benign	0.24
PhyloP100		-0.34

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

Other links and lift over

dbSNP: rs7790758; hg19: chr7-50561544;