chr21-40013378-T-C

Position:

chr21-40013378-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_001389.5(DSCAM):c.5695A>G(p.Ile1899Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000193 in 1,552,382 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

DSCAM
NM_001389.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.34

Variant links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), DSCAM. . Gene score misZ 3.2228 (greater than the threshold 3.09). Trascript score misZ 4.4297 (greater than threshold 3.09). GenCC has associacion of gene with autism spectrum disorder.

BP4

Computational evidence support a benign effect (MetaRNN=0.09927511).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
DSCAM	NM_001389.5 linkuse as main transcript	c.5695A>G	p.Ile1899Val	missense_variant	33/33	ENST00000400454.6	NP_001380.2
DSCAM	XM_017028281.2 linkuse as main transcript	c.4987A>G	p.Ile1663Val	missense_variant	30/30		XP_016883770.1
DSCAM	NM_001271534.3 linkuse as main transcript	c.5687-46A>G		intron_variant			NP_001258463.1
DSCAM	NR_073202.3 linkuse as main transcript	n.6001A>G		non_coding_transcript_exon_variant	33/33

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSCAM	ENST00000400454.6 linkuse as main transcript	c.5695A>G	p.Ile1899Val	missense_variant	33/33	1	NM_001389.5	ENSP00000383303	P1	O60469-1
DSCAM	ENST00000404019.2 linkuse as main transcript	c.4943-46A>G		intron_variant		1		ENSP00000385342
DSCAM	ENST00000617870.4 linkuse as main transcript	c.5200A>G	p.Ile1734Val	missense_variant	30/30	5		ENSP00000478698

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.000478

GnomAD4 exome

AF:

0.00000143

AC:

AN:

1400208

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

690074

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000185

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.000478

Bravo

AF:

0.0000264

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2024

The c.5695A>G (p.I1899V) alteration is located in exon 33 (coding exon 33) of the DSCAM gene. This alteration results from a A to G substitution at nucleotide position 5695, causing the isoleucine (I) at amino acid position 1899 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.60

CADD

Benign

DANN

Benign

0.69

DEOGEN2

Benign

0.037

T;.

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.068

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.82

T;T

M_CAP

Benign

0.0050

MetaRNN

Benign

0.099

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.69

N;.

MutationTaster

Benign

0.81

PrimateAI

Uncertain

0.57

PROVEAN

Benign

0.040

N;.

REVEL

Benign

0.075

Sift

Benign

0.61

T;.

Sift4G

Benign

0.95

T;T

Polyphen

0.0

B;.

Vest4

0.021

MutPred

0.21

Gain of sheet (P = 0.0125);.;

MVP

0.38

MPC

0.44

ClinPred

0.16

GERP RS

5.4

Varity_R

0.057

gMVP

0.12

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over