Genetic Variant CAPN1:p.Pro75His (chr11-65182925-C-A) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate

The NM_005186.4(CAPN1):c.224C>A(p.Pro75His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000682 in 1,612,372 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

CAPN1
NM_005186.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.87

Variant links:

Genes affected

CAPN1 (HGNC:1476): (calpain 1) The calpains, calcium-activated neutral proteases, are nonlysosomal, intracellular cysteine proteases. The mammalian calpains include ubiquitous, stomach-specific, and muscle-specific proteins. The ubiquitous enzymes consist of heterodimers with distinct large, catalytic subunits associated with a common small, regulatory subunit. This gene encodes the large subunit of the ubiquitous enzyme, calpain 1. Several transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Nov 2010]

CAPN1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1

In a domain Calpain catalytic (size 299) in uniprot entity CAN1_HUMAN there are 5 pathogenic changes around while only 2 benign (71%) in NM_005186.4

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.84

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CAPN1	NM_005186.4 link	c.224C>A	p.Pro75His	missense_variant	Exon 2 of 22	ENST00000279247.11	NP_005177.2	P07384

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CAPN1	ENST00000279247.11 link	c.224C>A	p.Pro75His	missense_variant	Exon 2 of 22	1	NM_005186.4	ENSP00000279247.7		P07384

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000163

AC:

AN:

245688

Hom.:

AF XY:

0.0000150

AC XY:

AN XY:

133340

show subpopulations

Gnomad AFR exome

AF:

0.000266

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1460240

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726272

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152132

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000987

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.0000248

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jun 06, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.224C>A (p.P75H) alteration is located in exon 2 (coding exon 1) of the CAPN1 gene. This alteration results from a C to A substitution at nucleotide position 224, causing the proline (P) at amino acid position 75 to be replaced by a histidine (H). 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

0.21

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.46

T;T;D;T;T;D;D;D;T;.;T;.;D

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.93

D;D;.;.;D;.;.;.;D;D;D;D;D

M_CAP

Uncertain

0.15

MetaRNN

Pathogenic

0.84

D;D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

-0.15

MutationAssessor

Pathogenic

4.0

.;.;H;.;.;H;H;H;.;.;.;.;H

PrimateAI

Uncertain

0.61

PROVEAN

Pathogenic

-8.0

D;D;D;D;D;D;D;D;D;D;D;D;D

REVEL

Uncertain

0.57

Sift

Uncertain

0.016

D;D;D;D;D;D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.030

D;D;D;D;D;D;D;D;D;D;D;D;D

Polyphen

1.0

.;.;D;.;.;D;D;D;.;.;.;.;D

Vest4

0.80, 0.80, 0.80, 0.72

MVP

0.97

MPC

1.1

ClinPred

0.99

GERP RS

4.2

Varity_R

0.81

gMVP

0.62

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