11-65182753-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005186.4(CAPN1):c.52G>T(p.Val18Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000253 in 1,582,680 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CAPN1 NM_005186.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.36

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.104837835).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CAPN1	NM_005186.4	c.52G>T	p.Val18Leu	missense_variant	2/22	ENST00000279247.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CAPN1	ENST00000279247.11	c.52G>T	p.Val18Leu	missense_variant	2/22	1	NM_005186.4	P1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152158 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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

GnomAD4 exome AF: 0.00000210 AC: 3 AN: 1430522 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 708882

Gnomad4 AFR exome AF: 0.00

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: 0.00000182

Gnomad4 OTH exome AF: 0.0000169

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152158 Hom.: 0 Cov.: 33 AF XY: 0.0000135 AC XY: 1 AN XY: 74324

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000654

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

ExAC AF: 0.00000832 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 23, 2023

Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 1942404). This variant has not been reported in the literature in individuals affected with CAPN1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 18 of the CAPN1 protein (p.Val18Leu). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.31
BayesDel_addAF	Uncertain	0.052	T
BayesDel_noAF	Benign	-0.16
Cadd	Benign	17
Dann	Benign	0.88
DEOGEN2	Benign	0.0019	T;T;T;T;T;T;T;T;.;T;.;T;.;T
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.37
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.84	T;T;.;.;T;.;.;.;T;T;T;T;T;T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.10	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	-0.17	T
MutationTaster	Benign	0.73	N;N;N;N;N
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	0.32	N;N;N;N;N;N;N;N;N;N;N;N;N;N
REVEL	Benign	0.052
Sift	Benign	1.0	T;T;T;T;T;T;T;T;T;T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;T;T;T;D;T;T;T;T;T
Polyphen		0.0010	.;.;B;.;.;B;B;B;.;.;.;.;.;B
Vest4		0.12, 0.12, 0.13, 0.14
MutPred		0.41		Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);Loss of loop (P = 0.0804);
MVP		0.82
MPC		0.31
ClinPred		0.18	T
GERP RS		2.9
Varity_R		0.10
gMVP		0.34

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

Other links and lift over

dbSNP: rs750381675; hg19: chr11-64950224;