chr15-42389050-TGAA-T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1PM4_SupportingPP5_Very_Strong

The NM_000070.3(CAPN3):c.759_761delGAA(p.Lys254del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.000062 in 1,613,988 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000063 ( 0 hom. )

Consequence

CAPN3
NM_000070.3 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Pathogenic reviewed by expert panel P:12

Conservation

PhyloP100: 5.60

Publications

6 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):

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: Orphanet, Myriad Women’s Health, Labcorp Genetics (formerly Invitae)
muscular dystrophy, limb-girdle, autosomal dominant 4
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
muscular dystrophy, limb-girdle, autosomal dominant
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

CAPN3 links:

ENSG00000258461 (HGNC:):

ENSG00000258461 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PM1

In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 9 uncertain in NM_000070.3

PM4

Nonframeshift variant in NON repetitive region in NM_000070.3. Strenght limited to Supporting due to length of the change: 1aa.

PP5

Variant 15-42389050-TGAA-T is Pathogenic according to our data. Variant chr15-42389050-TGAA-T is described in ClinVar as Pathogenic. ClinVar VariationId is 197624.Status of the report is reviewed_by_expert_panel, 3 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
CAPN3	NM_000070.3 link	c.759_761delGAA	p.Lys254del	disruptive_inframe_deletion	Exon 5 of 24	ENST00000397163.8	NP_000061.1
CAPN3	NM_024344.2 link	c.759_761delGAA	p.Lys254del	disruptive_inframe_deletion	Exon 5 of 23		NP_077320.1
CAPN3	NM_173087.2 link	c.759_761delGAA	p.Lys254del	disruptive_inframe_deletion	Exon 5 of 21		NP_775110.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
CAPN3	ENST00000397163.8 link	c.759_761delGAA	p.Lys254del	disruptive_inframe_deletion	Exon 5 of 24	1	NM_000070.3	ENSP00000380349.3
ENSG00000258461	ENST00000495723.1 link	n.555_557delGAA		non_coding_transcript_exon_variant	Exon 9 of 26	2		ENSP00000492063.1
ENSG00000258461	ENST00000495723.1 link	n.555_557delGAA		3_prime_UTR_variant	Exon 9 of 26	2		ENSP00000492063.1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152106

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000398

AC:

AN:

251418

AF XY:

0.0000515

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000629

AC:

AN:

1461882

Hom.:

AF XY:

0.0000688

AC XY:

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33480

American (AMR)

AF:

0.0000447

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.0000755

AC:

AN:

1112008

Other (OTH)

AF:

0.0000828

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.449

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:

0.0000526

AC:

AN:

152106

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74306

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41430

American (AMR)

AF:

0.00

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

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:

0.0000712

Hom.:

Bravo

AF:

0.0000529

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:12

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not provided

Pathogenic:5

Oct 27, 2020

Athena Diagnostics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The frequency of this variant in the general population is consistent with pathogenicity (http://gnomad.broadinstitute.org). This variant is statistically more frequent in affected individuals than in the general population and/or healthy controls. In multiple individuals, this variant has been seen with a single recessive pathogenic variant in the same gene, suggesting this variant may also be pathogenic.

Feb 28, 2018

Eurofins Ntd Llc (ga)

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Mar 17, 2025

Revvity Omics, Revvity

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Oct 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CAPN3: PM3:Very Strong, PM2, PM4:Supporting

May 25, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In-frame deletion of 1 amino acid in a non-repeat region predicted to critically alter the protein; Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 22622166, 20694146, 34720847, 26810512, 16141003, 10330340, 28300015, 12461690, 27447704, 16344536, 18334579, 18563459, 30564623, 30919934, 31980526, 33741228, 32528171, 18055493)

Autosomal recessive limb-girdle muscular dystrophy type 2A

Pathogenic:3

May 06, 2021

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant, c.759_761del, results in the deletion of 1 amino acid(s) of the CAPN3 protein (p.Lys254del), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (rs760168012, gnomAD 0.01%). This variant has been observed in individual(s) with autosomal recessive limb-girdle muscular dystrophy (PMID: 10330340, 16141003, 18055493, 18334579, 18563459, 20694146, 22622166). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 197624). For these reasons, this variant has been classified as Pathogenic.

Jul 28, 2017

Counsyl

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Muscular dystrophy, limb-girdle, autosomal dominant 4

Pathogenic:1

Mar 23, 2024

Baylor Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Autosomal recessive limb-girdle muscular dystrophy type 2A;C4748295:Muscular dystrophy, limb-girdle, autosomal dominant 4

Pathogenic:1

May 29, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Autosomal recessive limb-girdle muscular dystrophy

Pathogenic:1

Jan 09, 2025

ClinGen Limb Girdle Muscular Dystrophy Variant Curation Expert Panel, ClinGen

Significance:Pathogenic

Review Status:reviewed by expert panel

Collection Method:curation

The NM_000070.3: c.759_761del variant in CAPN3, which is also known as c.756_758del, is predicted to cause a change in the length of the protein due to an in-frame deletion of one amino acid in a non-repeat region, p.(Lys254del) (PM4). This variant has been detected in at least 11 unrelated individuals with limb girdle muscular dystrophy (PMID: 26886200, 10330340, 16141003, 18055493, 30564623, 12461690, 35731190), including in a homozygous state in one case (0.5 pts; PMID: 18055493), confirmed in trans with a pathogenic variant in three cases (c.1468C>T p.(Arg490Trp), 1.0 pt, PMID: 12461690; c.1746-20C>G, 2.0 pts, PMID: 35731190), and in unknown phase with a pathogenic variant in one case (c.1468C>T p.(Arg490Trp), 0.5 pts, PMID: 18055493) (PM3_Very Strong). At least one patient with this variant displayed progressive limb girdle muscle weakness or a clinical suspicion of LGMD (PP4). The filtering allele frequency of the variant is 0.0001933 for European (non-Finnish) genome alleles in gnomAD v3.1.2 (the upper threshold of the 95% CI of 7/68016), which is greater than the LGMD VCEP threshold (<0.0001) for PM2_Supporting (criterion not met). In summary, this variant meets the criteria to be classified as Pathogenic for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen LGMD VCEP (LGMD VCEP specifications version 1.0.0; 01/09/2025): PM4, PM3_Very Strong, PP4.

See cases

Pathogenic:1

Feb 03, 2022

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

ACMG classification criteria: PS3, PS4, PM4

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

5.6

Mutation Taster

=49/51

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over