4-94226247-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 1P and 3B. PP2BP4_ModerateBS1_Supporting

The NM_020159.5(SMARCAD1):c.319T>C(p.Ser107Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000513 in 1,461,154 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000051 ( 0 hom. )

Consequence

SMARCAD1
NM_020159.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.70

Variant links:

Genes affected

SMARCAD1 (HGNC:18398): (SWI/SNF-related, matrix-associated actin-dependent regulator of chromatin, subfamily a, containing DEAD/H box 1) This gene encodes a member of the SNF subfamily of helicase proteins. The encoded protein plays a critical role in the restoration of heterochromatin organization and propagation of epigenetic patterns following DNA replication by mediating histone H3/H4 deacetylation. Mutations in this gene are associated with adermatoglyphia. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

SMARCAD1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PP2

Missense variant where missense usually causes diseases, SMARCAD1

BP4

Computational evidence support a benign effect (MetaRNN=0.21409586).

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.0000513 (75/1461154) while in subpopulation NFE AF= 0.0000666 (74/1111514). AF 95% confidence interval is 0.0000542. There are 0 homozygotes in gnomad4_exome. There are 30 alleles in male gnomad4_exome subpopulation. Median coverage is 30. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMARCAD1	NM_020159.5 linkuse as main transcript	c.319T>C	p.Ser107Pro	missense_variant	3/24	ENST00000354268.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMARCAD1	ENST00000354268.9 linkuse as main transcript	c.319T>C	p.Ser107Pro	missense_variant	3/24	1	NM_020159.5	P4	Q9H4L7-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

251074

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135728

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000513

AC:

AN:

1461154

Hom.:

Cov.:

AF XY:

0.0000413

AC XY:

AN XY:

726920

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:

0.0000666

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000508

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

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

Jan 06, 2023

The c.319T>C (p.S107P) alteration is located in exon 3 (coding exon 2) of the SMARCAD1 gene. This alteration results from a T to C substitution at nucleotide position 319, causing the serine (S) at amino acid position 107 to be replaced by a proline (P). 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

0.074

BayesDel_addAF

Benign

-0.031

BayesDel_noAF

Benign

-0.27

Cadd

Benign

Dann

Uncertain

1.0

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.84

M_CAP

Benign

0.011

MetaRNN

Benign

0.21

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.90

L;L;L

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.75

N;N;N

REVEL

Benign

0.12

Sift

Uncertain

0.017

D;D;D

Sift4G

Benign

0.27

T;T;T

Polyphen

1.0

D;D;D

Vest4

0.39

MutPred

0.15

Gain of relative solvent accessibility (P = 0.0166);Gain of relative solvent accessibility (P = 0.0166);Gain of relative solvent accessibility (P = 0.0166);

MVP

0.48

MPC

0.85

ClinPred

0.62

GERP RS

5.8

Varity_R

0.21

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

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