rs775057827

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM2PP3PP5_Very_Strong

The NM_014140.4(SMARCAL1):c.836T>C(p.Phe279Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000731 in 1,613,710 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. F279F) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000075 ( 1 hom. )

Consequence

SMARCAL1
NM_014140.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, multiple submitters, no conflicts P:5U:2

Conservation

PhyloP100: 5.32

Publications

4 publications found

Variant links:

Genes affected

SMARCAL1 (HGNC:11102): (SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily a like 1) The protein encoded by this gene is a member of the SWI/SNF family of proteins. Members of this family have helicase and ATPase activities and are thought to regulate transcription of certain genes by altering the chromatin structure around those genes. The encoded protein shows sequence similarity to the E. coli RNA polymerase-binding protein HepA. Mutations in this gene are a cause of Schimke immunoosseous dysplasia (SIOD), an autosomal recessive disorder with the diagnostic features of spondyloepiphyseal dysplasia, renal dysfunction, and T-cell immunodeficiency. [provided by RefSeq, Jul 2008]

SMARCAL1 Gene-Disease associations (from GenCC):

Schimke immuno-osseous dysplasia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, ClinGen, Labcorp Genetics (formerly Invitae)

SMARCAL1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.82

PP5

Variant 2-216416281-T-C is Pathogenic according to our data. Variant chr2-216416281-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 562357.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCAL1	NM_014140.4 link	c.836T>C	p.Phe279Ser	missense_variant	Exon 4 of 18	ENST00000357276.9	NP_054859.2	Q9NZC9
SMARCAL1	NM_001127207.2 link	c.836T>C	p.Phe279Ser	missense_variant	Exon 4 of 18		NP_001120679.1	Q9NZC9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCAL1	ENST00000357276.9 link	c.836T>C	p.Phe279Ser	missense_variant	Exon 4 of 18	2	NM_014140.4	ENSP00000349823.4		Q9NZC9

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000107

AC:

AN:

251494

AF XY:

0.0000883

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000202

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000746

AC:

109

AN:

1461538

Hom.:

Cov.:

AF XY:

0.0000756

AC XY:

AN XY:

727090

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.0000447

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26126

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86240

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53384

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000917

AC:

102

AN:

1111776

Other (OTH)

AF:

0.0000497

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74342

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41444

American (AMR)

AF:

0.0000654

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.542

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000121

Hom.:

Bravo

AF:

0.0000604

ExAC

AF:

0.000157

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:5Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Schimke immuno-osseous dysplasia

Pathogenic:4

Apr 04, 2023

Genetics and Molecular Pathology, SA Pathology

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The SMARCAL1 c.836T>C variant is classified as Likely Pathogenic (PS4_Moderate, PM2, PM3, PP3) The SMARCAL1 c.836T>C variant is a single nucleotide change in exon 4/18 of the SMARCAL1 gene, which is predicted to change the amino acid phenylalanine at position 279 in the protein to serine. The variant has been reported in >5 affected patients in the literature (PMID:17089404, PMID:21914180, PMID:22998683, PMID:26499378, PMID:30295827) (PS4_Moderate). The variant is rare in population databases (gnomAD allele frequency = 0.0059%; 9 het and 0 hom in 152172 sequenced alleles; highest frequency = 0.010%, Non-Finnish European population) (PM2). This variant has been detected in trans with a pathogenic variant for this recessive condition (PMID:22998683, PMID:15880370, 30295827) (PM3). Computational predictions support a deleterious effect on the gene or gene product (PP3). The variant has been reported in dbSNP (rs775057827) and in the HGMD database as disease causing (CM051640). It has been reported as uncertain significance and likely pathogenic by other diagnostic laboratories (ClinVar Variation ID: 562357). -

Feb 24, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 01, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces phenylalanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 279 of the SMARCAL1 protein (p.Phe279Ser). This variant is present in population databases (rs775057827, gnomAD 0.02%). This missense change has been observed in individual(s) with clinical features of Schimke immunoosseous dysplasia (PMID: 15880370, 15884045, 17089404, 21914180, 22998683, 26499378, 30586318). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 562357). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SMARCAL1 protein function. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Aug 26, 2022

Revvity Omics, Revvity

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:1Uncertain:2

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Sep 16, 2018

Gharavi Laboratory, Columbia University

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.42

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

T;T;T;T

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.89

.;D;T;D

M_CAP

Uncertain

0.29

MetaRNN

Pathogenic

0.82

D;D;D;D

MetaSVM

Pathogenic

0.81

MutationAssessor

Pathogenic

3.4

M;M;.;.

PhyloP100

5.3

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-2.8

D;D;D;D

REVEL

Pathogenic

0.89

Sift

Uncertain

0.0070

D;D;D;D

Sift4G

Uncertain

0.0060

D;D;D;D

Polyphen

0.98

D;D;.;.

Vest4

0.93

MVP

0.98

MPC

1.1

ClinPred

0.81

GERP RS

5.1

PromoterAI

-0.0066

Neutral

(source)

Varity_R

0.93

gMVP

0.84

Mutation Taster

=13/87

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

Splicevardb

2.0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over