chr18-10671577-AT-A

Variant names:

• chr18-10671577-AT-A
• rs878853135
• NM_001378183.1:c.8547delA

Variant summary

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

The NM_001378183.1(PIEZO2):​c.8547delA​(p.Tyr2850IlefsTer7) variant causes a frameshift change involving the alteration of a non-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: PIEZO2 NM_001378183.1 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.832
• Publications: 3 publications found

Genes affected

PIEZO2 (HGNC:26270): (piezo type mechanosensitive ion channel component 2) The protein encoded by this gene contains more than thirty transmembrane domains and likely functions as part of mechanically-activated (MA) cation channels. These channels serve to connect mechanical forces to biological signals. The encoded protein quickly adapts MA currents in somatosensory neurons. Defects in this gene are a cause of type 5 distal arthrogryposis. Several alternatively spliced transcript variants of this gene have been described, but their full-length nature is not known. [provided by RefSeq, Feb 2014]

PIEZO2 Gene-Disease associations (from GenCC):

• Gordon syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• arthrogryposis, distal, with impaired proprioception and touch

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Illumina, G2P, Ambry Genetics
• arthrogryposis- oculomotor limitation-electroretinal anomalies syndrome

  Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics
• connective tissue disorder

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• Marden-Walker syndrome

  Inheritance: AR, AD Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, Ambry Genetics

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 5 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 18-10671577-AT-A is Pathogenic according to our data. Variant chr18-10671577-AT-A is described in ClinVar as Pathogenic. ClinVar VariationId is 235838.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378183.1. 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
	PIEZO2	NM_001378183.1	MANE Select	c.8547delA	p.Tyr2850IlefsTer7	frameshift	Exon 56 of 56	NP_001365112.1	A0A2H4UKA7
	PIEZO2	NM_001410871.1		c.8283delA	p.Tyr2762IlefsTer7	frameshift	Exon 54 of 54	NP_001397800.1	Q9H5I5-4
	PIEZO2	NM_022068.4		c.8208delA	p.Tyr2737IlefsTer7	frameshift	Exon 52 of 52	NP_071351.2	Q9H5I5-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIEZO2	ENST00000674853.1	MANE Select	c.8547delA	p.Tyr2850IlefsTer7	frameshift	Exon 56 of 56	ENSP00000501957.1	A0A2H4UKA7
	PIEZO2	ENST00000503781.7	TSL:1	c.8208delA	p.Tyr2737IlefsTer7	frameshift	Exon 52 of 52	ENSP00000421377.3	Q9H5I5-1
	PIEZO2	ENST00000580640.5	TSL:5	c.8283delA	p.Tyr2762IlefsTer7	frameshift	Exon 54 of 54	ENSP00000463094.1	Q9H5I5-4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Arthrogryposis- oculomotor limitation-electroretinal anomalies syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.83
Mutation Taster		=1/199	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: rs878853135; hg19: chr18-10671574;