Genetic Variant SSPN:p.Arg229Met (chr12-26231030-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005086.5(SSPN):c.686G>T(p.Arg229Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000929 in 1,614,046 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R229K) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

SSPN
NM_005086.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.73

Publications

2 publications found

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:

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

SSPN-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005086.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SSPN	NM_005086.5	MANE Select	c.686G>T	p.Arg229Met	missense	Exon 3 of 3	NP_005077.2
SSPN	NM_001135823.1		c.377G>T	p.Arg126Met	missense	Exon 3 of 3	NP_001129295.1	Q14714-3
SSPN-AS1	NR_187464.1		n.318C>A		non_coding_transcript_exon	Exon 3 of 3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SSPN	ENST00000242729.7	TSL:1 MANE Select	c.686G>T	p.Arg229Met	missense	Exon 3 of 3	ENSP00000242729.2	Q14714-1
SSPN	ENST00000535504.1	TSL:1	c.366+6651G>T		intron	N/A	ENSP00000438801.1	F5H0K2
SSPN	ENST00000858023.1		c.599G>T	p.Arg200Met	missense	Exon 2 of 2	ENSP00000528082.1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727230

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000108

AC:

AN:

1111996

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

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:

0.0000197

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74332

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41432

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68044

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

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:

0.00

Hom.:

Bravo

AF:

0.0000302

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.32

BayesDel_addAF

Benign

-0.037

BayesDel_noAF

Benign

-0.29

CADD

Uncertain

(source)

DANN

Benign

0.96

DEOGEN2

Uncertain

0.52

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.77

M_CAP

Benign

0.014

MetaRNN

Uncertain

0.47

MetaSVM

Benign

-0.95

MutationAssessor

Uncertain

2.2

PhyloP100

6.7

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-3.4

REVEL

Benign

0.17

Sift

Uncertain

0.025

Sift4G

Uncertain

0.041

Polyphen

0.98

Vest4

0.57

MutPred

0.43

Loss of methylation at R229 (P = 0.0264)

MVP

0.15

MPC

0.98

ClinPred

0.98

GERP RS

4.8

Varity_R

0.20

gMVP

0.69

Mutation Taster

=74/26

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over