3-8745602-C-G

Position:

• chr3-8745602-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PM1 PM5 PP3_Strong BS2

The NM_033337.3(CAV3):​c.191C>G​(p.Thr64Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,848 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T64P) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: CAV3 NM_033337.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1 O:1
• Conservation: PhyloP100: 7.50

Genes affected

CAV3 (HGNC:1529): (caveolin 3) This gene encodes a caveolin family member, which functions as a component of the caveolae plasma membranes found in most cell types. Caveolin proteins are proposed to be scaffolding proteins for organizing and concentrating certain caveolin-interacting molecules. Mutations identified in this gene lead to interference with protein oligomerization or intra-cellular routing, disrupting caveolae formation and resulting in Limb-Girdle muscular dystrophy type-1C (LGMD-1C), hyperCKemia or rippling muscle disease (RMD). Alternative splicing has been identified for this locus, with inclusion or exclusion of a differentially spliced intron. In addition, transcripts utilize multiple polyA sites and contain two potential translation initiation sites. [provided by RefSeq, Jul 2008]

CAV3 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a topological_domain Cytoplasmic (size 82) in uniprot entity CAV3_HUMAN there are 46 pathogenic changes around while only 9 benign (84%) in NM_033337.3
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrnull-null-null-null is described in UniProt as null.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.973
• BS2: High AC in GnomAdExome4 at 10 AD,Digenic gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CAV3	NM_033337.3	c.191C>G	p.Thr64Ser	missense_variant	2/2	ENST00000343849.3	NP_203123.1
CAV3	NM_001234.5	c.191C>G	p.Thr64Ser	missense_variant	2/3		NP_001225.1
OXTR	XR_007095681.1	n.1885-3000G>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CAV3	ENST00000343849.3	c.191C>G	p.Thr64Ser	missense_variant	2/2	1	NM_033337.3	ENSP00000341940.2
CAV3	ENST00000397368.2	c.191C>G	p.Thr64Ser	missense_variant	2/3	1		ENSP00000380525.2
CAV3	ENST00000472766.1	n.155+11612C>G		intron_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461848 Hom.: 0 Cov.: 32 AF XY: 0.00000825 AC XY: 6 AN XY: 727214

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000151

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Primary familial hypertrophic cardiomyopathy Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2005

- -

Caveolinopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not provided Other:1

not provided, no classification provided

curation

Leiden Muscular Dystrophy (CAV3)

Apr 15, 2012

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D;D
Eigen	Pathogenic	0.68
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.78	.;T
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Pathogenic	0.92	D
MutationAssessor	Uncertain	2.7	M;M
PrimateAI	Uncertain	0.66	T
PROVEAN	Uncertain	-2.8	D;D
REVEL	Pathogenic	0.88
Sift	Benign	0.058	T;T
Sift4G	Uncertain	0.032	D;D
Polyphen		0.97	D;D
Vest4		0.86
MutPred		0.88		Loss of stability (P = 0.0338);Loss of stability (P = 0.0338);
MVP		1.0
MPC		0.79
ClinPred		0.99	D
GERP RS		4.6
Varity_R		0.84
gMVP		0.76

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: rs121909280; hg19: chr3-8787288;