dbSNP rs28364364: CAPN3:p.Gly21Glu (chr15-42359867-G-A) – ACMG Classification: Benign (-13 pts)

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_000070.3(CAPN3):c.62G>A(p.Gly21Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00219 in 1,614,104 control chromosomes in the GnomAD database, including 55 homozygotes. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G21W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.011 ( 26 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 29 hom. )

Consequence

CAPN3
NM_000070.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:8

Conservation

PhyloP100: 0.921

Publications

7 publications found

Variant links:

Genes affected

CAPN3 (HGNC:1480): (calpain 3) Calpain, a heterodimer consisting of a large and a small subunit, is a major intracellular protease, although its function has not been well established. This gene encodes a muscle-specific member of the calpain large subunit family that specifically binds to titin. Mutations in this gene are associated with limb-girdle muscular dystrophies type 2A. Alternate promoters and alternative splicing result in multiple transcript variants encoding different isoforms and some variants are ubiquitously expressed. [provided by RefSeq, Jul 2008]

CAPN3 Gene-Disease associations (from GenCC):

muscular dystrophy, limb-girdle, autosomal dominant
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
autosomal recessive limb-girdle muscular dystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
autosomal recessive limb-girdle muscular dystrophy type 2A
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Myriad Women’s Health, Orphanet, Labcorp Genetics (formerly Invitae)
limb-girdle muscular dystrophy
Inheritance: SD Classification: DEFINITIVE Submitted by: ClinGen
muscular dystrophy, limb-girdle, autosomal dominant 4
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

CAPN3 links:

ENSG00000258461 (HGNC:):

ENSG00000258461 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0027940571).

BP6

Variant 15-42359867-G-A is Benign according to our data. Variant chr15-42359867-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 92419.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0109 (1666/152250) while in subpopulation AFR AF = 0.0374 (1555/41528). AF 95% confidence interval is 0.0359. There are 26 homozygotes in GnomAd4. There are 752 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 26 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000070.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CAPN3	NM_000070.3	MANE Select	c.62G>A	p.Gly21Glu	missense	Exon 1 of 24	NP_000061.1	P20807-1
CAPN3	NM_024344.2		c.62G>A	p.Gly21Glu	missense	Exon 1 of 23	NP_077320.1	P20807-3
CAPN3	NM_173087.2		c.62G>A	p.Gly21Glu	missense	Exon 1 of 21	NP_775110.1	P20807-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CAPN3	ENST00000397163.8	TSL:1 MANE Select	c.62G>A	p.Gly21Glu	missense	Exon 1 of 24	ENSP00000380349.3	P20807-1
CAPN3	ENST00000357568.8	TSL:1	c.62G>A	p.Gly21Glu	missense	Exon 1 of 23	ENSP00000350181.3	P20807-3
CAPN3	ENST00000349748.8	TSL:1	c.62G>A	p.Gly21Glu	missense	Exon 1 of 21	ENSP00000183936.4	P20807-2

Frequencies

GnomAD3 genomes

AF:

0.0109

AC:

1658

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0374

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00458

Gnomad ASJ

AF:

0.00375

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00623

GnomAD2 exomes

AF:

0.00313

AC:

785

AN:

250790

AF XY:

0.00270

show subpopulations

Gnomad AFR exome

AF:

0.0398

Gnomad AMR exome

AF:

0.00223

Gnomad ASJ exome

AF:

0.00298

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000264

Gnomad OTH exome

AF:

0.00180

GnomAD4 exome

AF:

0.00128

AC:

1864

AN:

1461854

Hom.:

Cov.:

AF XY:

0.00118

AC XY:

857

AN XY:

727228

show subpopulations

African (AFR)

AF:

0.0377

AC:

1262

AN:

33478

American (AMR)

AF:

0.00246

AC:

110

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00283

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000162

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00383

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.000189

AC:

210

AN:

1112000

Other (OTH)

AF:

0.00285

AC:

172

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

111

221

332

442

553

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

138

184

230

<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:

0.0109

AC:

1666

AN:

152250

Hom.:

Cov.:

AF XY:

0.0101

AC XY:

752

AN XY:

74444

show subpopulations

African (AFR)

AF:

0.0374

AC:

1555

AN:

41528

American (AMR)

AF:

0.00458

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00375

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000206

AC:

AN:

68022

Other (OTH)

AF:

0.00617

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

167

250

334

417

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

110

<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:

0.00559

Hom.:

Bravo

AF:

0.0132

ESP6500AA

AF:

0.0397

AC:

175

ESP6500EA

AF:

0.000582

AC:

ExAC

AF:

0.00390

AC:

474

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.000491

EpiControl

AF:

0.000533

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (4)

Autosomal recessive limb-girdle muscular dystrophy type 2A (3)

Limb-girdle muscular dystrophy, recessive (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.39

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.023

Eigen

Benign

-0.15

Eigen_PC

Benign

-0.081

FATHMM_MKL

Benign

0.35

LIST_S2

Uncertain

0.93

MetaRNN

Benign

0.0028

MetaSVM

Uncertain

-0.075

MutationAssessor

Benign

0.81

PhyloP100

0.92

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-1.4

REVEL

Uncertain

0.31

Sift

Uncertain

0.0060

Sift4G

Uncertain

0.018

Polyphen

0.80

Vest4

0.28

MVP

0.90

MPC

0.34

ClinPred

0.019

GERP RS

5.0

PromoterAI

0.036

Neutral

(source)

Varity_R

0.12

gMVP

0.62

Mutation Taster

=99/1

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