Genetic Variant SS18L1:p.Val130Met (chr20-62162763-G-A) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001301778.2(SS18L1):c.-6G>A variant causes a 5 prime UTR premature start codon gain change. The variant allele was found at a frequency of 0.0000416 in 1,608,654 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

SS18L1
NM_001301778.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.38

Variant links:

Genes affected

SS18L1 (HGNC:15592): (SS18L1 subunit of BAF chromatin remodeling complex) This gene encodes a calcium-responsive transactivator which is an essential subunit of a neuron-specific chromatin-remodeling complex. The structure of this gene is similar to that of the SS18 gene. Mutations in this gene are involved in amyotrophic lateral sclerosis (ALS). Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2014]

SS18L1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.11696735).

BS2

High AC in GnomAd4 at 29 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SS18L1	NM_198935.3 link	c.388G>A	p.Val130Met	missense_variant	Exon 5 of 11	ENST00000331758.8	NP_945173.1	O75177-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SS18L1	ENST00000331758.8 link	c.388G>A	p.Val130Met	missense_variant	Exon 5 of 11	1	NM_198935.3	ENSP00000333012.3	O75177-1
SS18L1	ENST00000370848.8 link	c.142G>A	p.Val48Met	missense_variant	Exon 2 of 9	1		ENSP00000359885.5	O75177-3
SS18L1	ENST00000491916.1 link	n.216G>A		non_coding_transcript_exon_variant	Exon 1 of 2	2

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000627

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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

GnomAD3 exomes

AF:

0.0000324

AC:

AN:

247090

Hom.:

AF XY:

0.0000297

AC XY:

AN XY:

134472

show subpopulations

Gnomad AFR exome

AF:

0.000506

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000261

AC:

AN:

1456448

Hom.:

Cov.:

AF XY:

0.0000180

AC XY:

AN XY:

723764

show subpopulations

Gnomad4 AFR exome

AF:

0.000419

Gnomad4 AMR exome

AF:

0.0000449

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000192

Gnomad4 NFE exome

AF:

0.0000144

Gnomad4 OTH exome

AF:

0.0000665

GnomAD4 genome

AF:

0.000191

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.000627

Gnomad4 AMR

AF:

0.000196

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:

0.00

Alfa

AF:

0.000162

Hom.:

Bravo

AF:

0.000144

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 27, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.388G>A (p.V130M) alteration is located in exon 5 (coding exon 5) of the SS18L1 gene. This alteration results from a G to A substitution at nucleotide position 388, causing the valine (V) at amino acid position 130 to be replaced by a methionine (M). 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

0.11

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.43

CADD

Benign

DANN

Benign

0.78

DEOGEN2

Benign

0.059

T;.

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.80

T;T

M_CAP

Benign

0.029

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-0.85

MutationAssessor

Benign

0.66

N;.

PrimateAI

Uncertain

0.58

PROVEAN

Benign

0.050

N;.

REVEL

Benign

0.081

Sift

Benign

1.0

T;.

Sift4G

Benign

0.27

T;T

Polyphen

1.0

D;.

Vest4

0.31

MVP

0.46

MPC

1.2

ClinPred

0.10

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.9

Varity_R

0.091

gMVP

0.29

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