12-108887534-G-T

Variant names:

• chr12-108887534-G-T
• rs7980427
• NM_001917.5:c.279G>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001917.5(DAO):​c.279G>T​(p.Ser93Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,650 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S93S) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DAO NM_001917.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.816
• Publications: 0 publications found

Genes affected

DAO (HGNC:2671): (D-amino acid oxidase) This gene encodes the peroxisomal enzyme D-amino acid oxidase. The enzyme is a flavoprotein which uses flavin adenine dinucleotide (FAD) as its prosthetic group. Its substrates include a wide variety of D-amino acids, but it is inactive on the naturally occurring L-amino acids. Its biological function is not known; it may act as a detoxifying agent which removes D-amino acids that accumulate during aging. In mice, it degrades D-serine, a co-agonist of the NMDA receptor. This gene may play a role in the pathophysiology of schizophrenia. [provided by RefSeq, Jul 2008]

DAO Gene-Disease associations (from GenCC):

• amyotrophic lateral sclerosis

  Inheritance: AD Classification: MODERATE, SUPPORTIVE, LIMITED, NO_KNOWN Submitted by: Ambry Genetics, Genomics England PanelApp, Orphanet, ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.59).
• BP7: Synonymous conserved (PhyloP=-0.816 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001917.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DAO	NM_001917.5	MANE Select	c.279G>T	p.Ser93Ser	synonymous	Exon 3 of 11	NP_001908.3
	DAO	NM_001413634.1		c.279G>T	p.Ser93Ser	synonymous	Exon 4 of 12	NP_001400563.1	P14920
	DAO	NM_001413635.1		c.279G>T	p.Ser93Ser	synonymous	Exon 3 of 10	NP_001400564.1	A0A0S2Z3J4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DAO	ENST00000228476.8	TSL:1 MANE Select	c.279G>T	p.Ser93Ser	synonymous	Exon 3 of 11	ENSP00000228476.3	P14920
	DAO	ENST00000551281.5	TSL:1	c.279G>T	p.Ser93Ser	synonymous	Exon 3 of 8	ENSP00000446853.1	A0A0B4J250
	DAO	ENST00000547122.5	TSL:1	n.195-1935G>T		intron	N/A	ENSP00000448095.1	A0A0B4J257

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461650 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727150

African (AFR) AF: 0.00 AC: 0 AN: 33462

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111810

Other (OTH) AF: 0.00 AC: 0 AN: 60388

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.59
CADD	Benign	1.2
DANN	Benign	0.70
PhyloP100		-0.82

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: rs7980427; hg19: chr12-109281310;