rs2837828

Positions:

• chr21-40803034-A-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001389.5(DSCAM):​c.43+43585T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.449 in 152,026 control chromosomes in the GnomAD database, including 17,239 homozygotes. 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: 𝑓 0.45 (17239 hom., cov: 31)
• Consequence: DSCAM NM_001389.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.928

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.623 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DSCAM	NM_001389.5	c.43+43585T>C		intron_variant		ENST00000400454.6
DSCAM	NM_001271534.3	c.43+43585T>C		intron_variant
DSCAM	NR_073202.3	n.540+43585T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSCAM	ENST00000400454.6	c.43+43585T>C		intron_variant		1	NM_001389.5	P1

Frequencies

GnomAD3 genomes AF: 0.450 AC: 68301 AN: 151906 Hom.: 17227 Cov.: 31

Gnomad AFR AF: 0.212

Gnomad AMI AF: 0.558

Gnomad AMR AF: 0.505

Gnomad ASJ AF: 0.558

Gnomad EAS AF: 0.380

Gnomad SAS AF: 0.640

Gnomad FIN AF: 0.485

Gnomad MID AF: 0.547

Gnomad NFE AF: 0.560

Gnomad OTH AF: 0.460

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

GnomAD4 genome AF: 0.449 AC: 68327 AN: 152026 Hom.: 17239 Cov.: 31 AF XY: 0.452 AC XY: 33558 AN XY: 74294

Gnomad4 AFR AF: 0.212

Gnomad4 AMR AF: 0.505

Gnomad4 ASJ AF: 0.558

Gnomad4 EAS AF: 0.380

Gnomad4 SAS AF: 0.642

Gnomad4 FIN AF: 0.485

Gnomad4 NFE AF: 0.560

Gnomad4 OTH AF: 0.462

Alfa AF: 0.537 Hom.: 20824

Bravo AF: 0.437

Asia WGS AF: 0.507 AC: 1762 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	0.39
DANN	Benign	0.75

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: rs2837828; hg19: chr21-42174960;