NM_002336.3:c.2224_2225dupTT

Variant names:

• chr12-12162246-C-CAA
• rs864309649
• NM_002336.3:c.2224_2225dupTT

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_002336.3(LRP6):​c.2224_2225dupTT​(p.Leu742PhefsTer7) variant causes a frameshift 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). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: LRP6 NM_002336.3 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.32
• Publications: 5 publications found

Genes affected

LRP6 (HGNC:6698): (LDL receptor related protein 6) This gene encodes a member of the low density lipoprotein (LDL) receptor gene family. LDL receptors are transmembrane cell surface proteins involved in receptor-mediated endocytosis of lipoprotein and protein ligands. The protein encoded by this gene functions as a receptor or, with Frizzled, a co-receptor for Wnt and thereby transmits the canonical Wnt/beta-catenin signaling cascade. Through its interaction with the Wnt/beta-catenin signaling cascade this gene plays a role in the regulation of cell differentiation, proliferation, and migration and the development of many cancer types. This protein undergoes gamma-secretase dependent RIP- (regulated intramembrane proteolysis) processing but the precise locations of the cleavage sites have not been determined.[provided by RefSeq, Dec 2009]

BCL2L14 (HGNC:16657): (BCL2 like 14) The protein encoded by this gene belongs to the BCL2 protein family. BCL2 family members form hetero- or homodimers and act as anti- or pro-apoptotic regulators that are involved in a wide variety of cellular activities. Overexpression of this gene has been shown to induce apoptosis in cells. Three alternatively spliced transcript variants encoding two distinct isoforms have been reported for this gene. [provided by RefSeq, May 2009]

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-12162246-C-CAA is Pathogenic according to our data. Variant chr12-12162246-C-CAA is described in ClinVar as Pathogenic. ClinVar VariationId is 218880.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002336.3. 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
	LRP6	NM_002336.3	MANE Select	c.2224_2225dupTT	p.Leu742PhefsTer7	frameshift	Exon 10 of 23	NP_002327.2	O75581
	LRP6	NM_001414244.1		c.2224_2225dupTT	p.Leu742PhefsTer7	frameshift	Exon 10 of 24	NP_001401173.1
	LRP6	NM_001414245.1		c.2224_2225dupTT	p.Leu742PhefsTer7	frameshift	Exon 10 of 24	NP_001401174.1	O75581

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LRP6	ENST00000261349.9	TSL:1 MANE Select	c.2224_2225dupTT	p.Leu742PhefsTer7	frameshift	Exon 10 of 23	ENSP00000261349.4	O75581
	LRP6	ENST00000543091.1	TSL:1	c.2224_2225dupTT	p.Leu742PhefsTer7	frameshift	Exon 10 of 23	ENSP00000442472.1	F5H7J9
	LRP6	ENST00000538239.5	TSL:1	n.1816_1817dupTT		non_coding_transcript_exon	Exon 9 of 24	ENSP00000445083.1	H0YGW5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Tooth agenesis, selective, 7 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs864309649; hg19: chr12-12315180;