chr3-8745596-ACACCACCTT-A

Variant names:

• chr3-8745596-ACACCACCTT-A
• rs199476331
• NM_033337.3:c.189_197delCACCTTCAC

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PM4 PP3 PP5

The NM_001234.5(CAV3):​c.189_197delCACCTTCAC​(p.Thr64_Thr66del) variant causes a disruptive inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CAV3 NM_001234.5 disruptive_inframe_deletion
• Clinical Significance: Pathogenic no assertion criteria provided P:1 O:1
• Conservation: PhyloP100: 8.87
• Publications: 1 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: Likely_pathogenic. The variant received 8 ACMG points.

• PM1: In a topological_domain Cytoplasmic (size 82) in uniprot entity CAV3_HUMAN there are 14 pathogenic changes around while only 6 benign (70%) in NM_001234.5
• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_001234.5.
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP
• PP5: Variant 3-8745596-ACACCACCTT-A is Pathogenic according to our data. Variant chr3-8745596-ACACCACCTT-A is described in ClinVar as Pathogenic. ClinVar VariationId is 8277.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001234.5. 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.189_197delCACCTTCAC	p.Thr64_Thr66del	disruptive_inframe_deletion	Exon 2 of 2	NP_203123.1
	CAV3	NM_001234.5		c.189_197delCACCTTCAC	p.Thr64_Thr66del	disruptive_inframe_deletion	Exon 2 of 3	NP_001225.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAV3	ENST00000343849.3	TSL:1 MANE Select	c.189_197delCACCTTCAC	p.Thr64_Thr66del	disruptive_inframe_deletion	Exon 2 of 2	ENSP00000341940.2
	CAV3	ENST00000397368.2	TSL:1	c.189_197delCACCTTCAC	p.Thr64_Thr66del	disruptive_inframe_deletion	Exon 2 of 3	ENSP00000380525.2
	CAV3	ENST00000472766.1	TSL:2	n.155+11610_155+11618delCACCTTCAC		intron	N/A

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

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Rippling muscle disease 2 (1)
-	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		8.9
Mutation Taster		=1/199	disease causing (ClinVar)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs199476331; hg19: chr3-8787282;