rs797045176

Variant names:

• chr7-116559174-C-T
• rs797045176
• NM_001753.5:c.424C>T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_001753.5(CAV1):​c.424C>T​(p.Gln142*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. Q142Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CAV1 NM_001753.5 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.57
• Publications: 5 publications found

Genes affected

CAV1 (HGNC:1527): (caveolin 1) The scaffolding protein encoded by this gene is the main component of the caveolae plasma membranes found in most cell types. The protein links integrin subunits to the tyrosine kinase FYN, an initiating step in coupling integrins to the Ras-ERK pathway and promoting cell cycle progression. The gene is a tumor suppressor gene candidate and a negative regulator of the Ras-p42/44 mitogen-activated kinase cascade. Caveolin 1 and caveolin 2 are located next to each other on chromosome 7 and express colocalizing proteins that form a stable hetero-oligomeric complex. Mutations in this gene have been associated with Berardinelli-Seip congenital lipodystrophy. Alternatively spliced transcripts encode alpha and beta isoforms of caveolin 1.[provided by RefSeq, Mar 2010]

CAV1 Gene-Disease associations (from GenCC):

• pulmonary arterial hypertension

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• partial lipodystrophy, congenital cataracts, and neurodegeneration syndrome

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• pulmonary hypertension, primary, 3

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• congenital generalized lipodystrophy type 3

  Inheritance: AD, AR Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, G2P
• heritable pulmonary arterial hypertension

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Berardinelli-Seip congenital lipodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• amyotrophic lateral sclerosis

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 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 6 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-116559174-C-T is Pathogenic according to our data. Variant chr7-116559174-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 209106.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001753.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAV1	NM_001753.5	MANE Select	c.424C>T	p.Gln142*	stop_gained	Exon 3 of 3	NP_001744.2
	CAV1	NM_001172895.1		c.331C>T	p.Gln111*	stop_gained	Exon 3 of 3	NP_001166366.1
	CAV1	NM_001172896.2		c.331C>T	p.Gln111*	stop_gained	Exon 2 of 2	NP_001166367.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAV1	ENST00000341049.7	TSL:1 MANE Select	c.424C>T	p.Gln142*	stop_gained	Exon 3 of 3	ENSP00000339191.2
	CAV1	ENST00000393467.1	TSL:1	c.331C>T	p.Gln111*	stop_gained	Exon 2 of 2	ENSP00000377110.1
	CAV1	ENST00000393468.1	TSL:1	c.331C>T	p.Gln111*	stop_gained	Exon 3 of 3	ENSP00000377111.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Congenital generalized lipodystrophy type 3 (1)
1	-	-	Partial lipodystrophy, congenital cataracts, and neurodegeneration syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	38
DANN	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Uncertain	0.95	D
PhyloP100		7.6
Vest4		0.93
GERP RS		5.6
Mutation Taster		=0/200	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs797045176; hg19: chr7-116199228;