17-50169187-C-G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM1BP4_ModerateBP6

The NM_000023.4(SGCA):c.680C>G(p.Pro227Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000219 in 1,614,034 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P227P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

SGCA
NM_000023.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:2

Conservation

PhyloP100: 3.17

Publications

3 publications found

Variant links:

Genes affected

SGCA (HGNC:10805): (sarcoglycan alpha) This gene encodes a component of the dystrophin-glycoprotein complex (DGC), which is critical to the stability of muscle fiber membranes and to the linking of the actin cytoskeleton to the extracellular matrix. Its expression is thought to be restricted to striated muscle. Mutations in this gene result in type 2D autosomal recessive limb-girdle muscular dystrophy. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2008]

SGCA Gene-Disease associations (from GenCC):

autosomal recessive limb-girdle muscular dystrophy
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, PanelApp Australia
autosomal recessive limb-girdle muscular dystrophy type 2D
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Myriad Women’s Health, Labcorp Genetics (formerly Invitae), Orphanet

SGCA links:

ENSG00000253730 (HGNC:):

ENSG00000253730 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PM1

In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in NM_000023.4

BP4

Computational evidence support a benign effect (MetaRNN=0.10814431).

BP6

Variant 17-50169187-C-G is Benign according to our data. Variant chr17-50169187-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 198033.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000023.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SGCA	NM_000023.4	MANE Select	c.680C>G	p.Pro227Arg	missense	Exon 6 of 10	NP_000014.1	A0A0S2Z4Q1
SGCA	NM_001135697.3		c.584+615C>G		intron	N/A	NP_001129169.1	A0A0S2Z4P8
SGCA	NR_135553.2		n.716C>G		non_coding_transcript_exon	Exon 6 of 9

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SGCA	ENST00000262018.8	TSL:1 MANE Select	c.680C>G	p.Pro227Arg	missense	Exon 6 of 10	ENSP00000262018.3	Q16586-1
SGCA	ENST00000344627.10	TSL:1	c.584+615C>G		intron	N/A	ENSP00000345522.6	Q16586-2
SGCA	ENST00000952408.1		c.770C>G	p.Pro257Arg	missense	Exon 6 of 10	ENSP00000622467.1

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000368

Gnomad OTH

AF:

0.000479

GnomAD2 exomes

AF:

0.000298

AC:

AN:

251360

AF XY:

0.000346

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.000397

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000463

Gnomad NFE exome

AF:

0.000475

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000218

AC:

318

AN:

1461822

Hom.:

Cov.:

AF XY:

0.000204

AC XY:

148

AN XY:

727218

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.000268

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.000383

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.0000375

AC:

AN:

53384

Middle Eastern (MID)

AF:

0.000867

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000243

AC:

270

AN:

1111990

Other (OTH)

AF:

0.000248

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

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:

0.000237

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74424

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41514

American (AMR)

AF:

0.000392

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.000576

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000368

AC:

AN:

68002

Other (OTH)

AF:

0.000473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

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:

0.000328

Hom.:

Bravo

AF:

0.000246

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000313

AC:

EpiCase

AF:

0.000545

EpiControl

AF:

0.000830

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Autosomal recessive limb-girdle muscular dystrophy type 2D (4)

not provided (3)

not specified (1)

Sarcoglycanopathy (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Uncertain

-0.080

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.55

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.035

FATHMM_MKL

Uncertain

0.78

LIST_S2

Benign

0.64

M_CAP

Benign

0.077

MetaRNN

Benign

0.11

MetaSVM

Uncertain

0.25

MutationAssessor

Benign

1.8

PhyloP100

3.2

PrimateAI

Benign

0.41

PROVEAN

Benign

0.50

REVEL

Uncertain

0.33

Sift

Benign

0.69

Sift4G

Benign

0.87

Polyphen

0.016

Vest4

0.30

MVP

0.99

MPC

0.36

ClinPred

0.039

GERP RS

4.1

Varity_R

0.081

gMVP

0.47

Mutation Taster

=89/11

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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