Genetic Variant SSPN:p.Arg229Lys (chr12-26231030-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005086.5(SSPN):c.686G>A(p.Arg229Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000133 in 1,614,046 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

SSPN
NM_005086.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.73

Variant links:

Genes affected

SSPN (HGNC:11322): (sarcospan) This gene encodes a member of the dystrophin-glycoprotein complex (DGC). The DGC spans the sarcolemma and is comprised of dystrophin, syntrophin, alpha- and beta-dystroglycans and sarcoglycans. The DGC provides a structural link between the subsarcolemmal cytoskeleton and the extracellular matrix of muscle cells. Two alternatively spliced transcript variants that encode different protein isoforms have been described. [provided by RefSeq, Oct 2008]

SSPN links:

ENSG00000255750 (HGNC:):

ENSG00000255750 links:

ITPR2-AS1 (HGNC:56072): (ITPR2 and SSPN antisense RNA 1)

ITPR2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13594022).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SSPN	NM_005086.5 link	c.686G>A	p.Arg229Lys	missense_variant	Exon 3 of 3	ENST00000242729.7	NP_005077.2	Q14714-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SSPN	ENST00000242729.7 link	c.686G>A	p.Arg229Lys	missense_variant	Exon 3 of 3	1	NM_005086.5	ENSP00000242729.2		Q14714-1

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000220

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000103

AC:

AN:

251390

Hom.:

AF XY:

0.0000883

AC XY:

AN XY:

135854

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000196

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000132

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000132

AC:

193

AN:

1461872

Hom.:

Cov.:

AF XY:

0.000144

AC XY:

105

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000104

Gnomad4 FIN exome

AF:

0.0000374

Gnomad4 NFE exome

AF:

0.000120

Gnomad4 OTH exome

AF:

0.000248

GnomAD4 genome

AF:

0.000138

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000220

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000261

Hom.:

Bravo

AF:

0.000125

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000906

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 26, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.686G>A (p.R229K) alteration is located in exon 3 (coding exon 3) of the SSPN gene. This alteration results from a G to A substitution at nucleotide position 686, causing the arginine (R) at amino acid position 229 to be replaced by a lysine (K). 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

0.15

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.39

CADD

Benign

DANN

Benign

0.91

DEOGEN2

Benign

0.30

.;.;T

Eigen

Benign

0.11

Eigen_PC

Benign

0.18

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.80

.;T;T

M_CAP

Benign

0.0099

MetaRNN

Benign

0.14

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.2

.;.;M

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-1.6

N;N;N

REVEL

Benign

0.085

Sift

Benign

0.50

T;T;T

Sift4G

Benign

0.76

T;T;T

Polyphen

0.43

.;.;B

Vest4

0.47

MVP

0.20

MPC

0.53

ClinPred

0.071

GERP RS

4.8

Varity_R

0.24

gMVP

0.64

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