Genetic Variant NM_001890.2:c.496G>T (chr4-69944943-G-T) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_001890.2(CSN1S1):c.496G>T(p.Asp166Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,612,532 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D166N) has been classified as Uncertain significance.

Frequency

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

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

CSN1S1
NM_001890.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.274

Publications

5 publications found

Variant links:

Genes affected

CSN1S1 (HGNC:2445): (casein alpha s1) Predicted to be involved in response to dehydroepiandrosterone; response to estradiol; and response to steroid hormone. Located in extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

CSN1S1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.34001577).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSN1S1	NM_001890.2 link	c.496G>T	p.Asp166Tyr	missense_variant	Exon 15 of 16	ENST00000246891.9	NP_001881.1	P47710-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSN1S1	ENST00000246891.9 link	c.496G>T	p.Asp166Tyr	missense_variant	Exon 15 of 16	1	NM_001890.2	ENSP00000246891.4		P47710-1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151744

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000658

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:

0.00

GnomAD2 exomes

AF:

0.0000402

AC:

AN:

248816

AF XY:

0.0000370

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000443

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.0000445

AC:

AN:

1460788

Hom.:

Cov.:

AF XY:

0.0000468

AC XY:

AN XY:

726712

show subpopulations

African (AFR)

AF:

0.000150

AC:

AN:

33398

American (AMR)

AF:

0.00

AC:

AN:

44618

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26098

East Asian (EAS)

AF:

0.00

AC:

AN:

39678

South Asian (SAS)

AF:

0.0000928

AC:

AN:

86240

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53386

Middle Eastern (MID)

AF:

0.00122

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.0000369

AC:

AN:

1111308

Other (OTH)

AF:

0.0000663

AC:

AN:

60304

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151744

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74058

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41306

American (AMR)

AF:

0.0000658

AC:

AN:

15206

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5148

South Asian (SAS)

AF:

0.00

AC:

AN:

4804

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10550

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67952

Other (OTH)

AF:

0.00

AC:

AN:

2084

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000113

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000497

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 09, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.496G>T (p.D166Y) alteration is located in exon 15 (coding exon 14) of the CSN1S1 gene. This alteration results from a G to T substitution at nucleotide position 496, causing the aspartic acid (D) at amino acid position 166 to be replaced by a tyrosine (Y). 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

0.19

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.39

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Uncertain

0.43

T;.;.;T;.

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.91

FATHMM_MKL

Benign

0.021

LIST_S2

Benign

0.57

T;T;T;T;T

M_CAP

Benign

0.031

MetaRNN

Benign

0.34

T;T;T;T;T

MetaSVM

Benign

-0.80

MutationAssessor

Benign

1.7

L;.;.;.;.

PhyloP100

-0.27

PrimateAI

Benign

0.29

PROVEAN

Pathogenic

-5.4

D;D;D;D;D

REVEL

Benign

0.11

Sift

Uncertain

0.0020

D;D;D;D;D

Sift4G

Uncertain

0.012

D;D;D;D;D

Polyphen

1.0

D;.;D;.;.

Vest4

0.48

MutPred

0.57

Loss of disorder (P = 0.0245);.;.;.;.;

MVP

0.43

MPC

0.27

ClinPred

0.95

GERP RS

-3.6

Varity_R

0.11

gMVP

0.20

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_001890.2:c.496G>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over