chr3-8745700-TTCTG-T

Position:

• chr3-8745700-TTCTG-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_033337.3(CAV3):​c.290_293delTCTG​(p.Phe97fs) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CAV3 NM_033337.3 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.61

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 Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 7 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CAV3	NM_033337.3	c.290_293delTCTG	p.Phe97fs	frameshift_variant	2/2	ENST00000343849.3	NP_203123.1
CAV3	NM_001234.5	c.290_293delTCTG	p.Phe97fs	frameshift_variant	2/3		NP_001225.1
OXTR	XR_007095681.1	n.1885-3102_1885-3099delCAGA		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CAV3	ENST00000343849.3	c.290_293delTCTG	p.Phe97fs	frameshift_variant	2/2	1	NM_033337.3	ENSP00000341940.2
CAV3	ENST00000397368.2	c.290_293delTCTG	p.Phe97fs	frameshift_variant	2/3	1		ENSP00000380525.2
CAV3	ENST00000472766.1	n.155+11711_155+11714delTCTG		intron_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

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: rs116840802; hg19: chr3-8787386;