chr3-8745602-C-G

Variant names:

• chr3-8745602-C-G
• rs121909280
• NM_033337.3:c.191C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 7P and 4B. PM1 PP2 PP3_Strong BS1

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 Uncertain significance.

• 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
• Publications: 8 publications found

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]

OXTR (HGNC:8529): (oxytocin receptor) The protein encoded by this gene belongs to the G-protein coupled receptor family and acts as a receptor for oxytocin. Its activity is mediated by G proteins which activate a phosphatidylinositol-calcium second messenger system. The oxytocin-oxytocin receptor system plays an important role in the uterus during parturition. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a region_of_interest Required for interaction with DAG1 (size 50) in uniprot entity CAV3_HUMAN there are 7 pathogenic changes around while only 2 benign (78%) in NM_033337.3
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 17 curated pathogenic missense variants (we use a threshold of 10). The gene has 2 curated benign missense variants. Gene score misZ: 0.83011 (below the threshold of 3.09). Trascript score misZ: 0.9876 (below the threshold of 3.09). GenCC associations: The gene is linked to distal myopathy, Tateyama type, caveolinopathy, inherited rippling muscle disease, autosomal dominant limb-girdle muscular dystrophy type 1C, long QT syndrome, long QT syndrome 9, Brugada syndrome, rippling muscle disease 2.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.973
• BS1: Variant frequency is greater than expected in population eas. GnomAdExome4 allele frequency = 0.00000684 (10/1461848) while in subpopulation EAS AF = 0.000151 (6/39698). AF 95% confidence interval is 0.0000651. There are 0 homozygotes in GnomAdExome4. There are 6 alleles in the male GnomAdExome4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033337.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAV3	NM_033337.3	MANE Select	c.191C>G	p.Thr64Ser	missense	Exon 2 of 2	NP_203123.1	P56539
	CAV3	NM_001234.5		c.191C>G	p.Thr64Ser	missense	Exon 2 of 3	NP_001225.1	P56539

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAV3	ENST00000343849.3	TSL:1 MANE Select	c.191C>G	p.Thr64Ser	missense	Exon 2 of 2	ENSP00000341940.2	P56539
	CAV3	ENST00000397368.2	TSL:1	c.191C>G	p.Thr64Ser	missense	Exon 2 of 3	ENSP00000380525.2	P56539
	CAV3	ENST00000472766.1	TSL:2	n.155+11612C>G		intron	N/A

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

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.000151 AC: 6 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111986

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Caveolinopathy (1)
1	-	-	Primary familial hypertrophic cardiomyopathy (1)
-	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

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
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
MetaSVM	Pathogenic	0.92	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		7.5
PrimateAI	Uncertain	0.66	T
PROVEAN	Uncertain	-2.8	D
REVEL	Pathogenic	0.88
Sift	Benign	0.058	T
Sift4G	Uncertain	0.032	D
Polyphen		0.97	D
Vest4		0.86
MutPred		0.88		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
Mutation Taster		=11/89	disease causing

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: rs121909280; hg19: chr3-8787288;