21-40151580-A-T

Variant names:

• chr21-40151580-A-T
• rs8130732
• NM_001389.5:c.3019-6849T>A

Variant summary

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

The NM_001389.5(DSCAM):​c.3019-6849T>A 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: 33)
• Consequence: DSCAM NM_001389.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.129
• Publications: 2 publications found

Genes affected

DSCAM (HGNC:3039): (DS cell adhesion molecule) This gene is a member of the immunoglobulin superfamily of cell adhesion molecules (Ig-CAMs), and is involved in human central and peripheral nervous system development. This gene is a candidate for Down syndrome and congenital heart disease (DSCHD). A gene encoding a similar Ig-CAM protein is located on chromosome 11. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Oct 2012]

DSCAM Gene-Disease associations (from GenCC):

• autism spectrum disorder

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics

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=-0.83).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001389.5. 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
	DSCAM	NM_001389.5	MANE Select	c.3019-6849T>A		intron	N/A	NP_001380.2
	DSCAM	NM_001271534.3		c.3019-6849T>A		intron	N/A	NP_001258463.1
	DSCAM	NR_073202.3		n.3516-6849T>A		intron	N/A

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DSCAM	ENST00000400454.6	TSL:1 MANE Select	c.3019-6849T>A		intron	N/A	ENSP00000383303.1
	DSCAM	ENST00000404019.2	TSL:1	c.2275-6849T>A		intron	N/A	ENSP00000385342.2
	DSCAM	ENST00000617870.4	TSL:5	c.2524-6849T>A		intron	N/A	ENSP00000478698.1

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	3.9
DANN	Benign	0.43
PhyloP100		-0.13

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: rs8130732; hg19: chr21-41523507;