18-10762977-A-G

Position:

• chr18-10762977-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PM5 PP3_Moderate PP5

The NM_001378183.1(PIEZO2):​c.3068T>C​(p.Met1023Thr) variant causes a missense 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). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M1023I) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 36)
• Consequence: PIEZO2 NM_001378183.1 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.32

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr18-10762976-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 3340624.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.868
• PP5: Variant 18-10762977-A-G is Pathogenic according to our data. Variant chr18-10762977-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 235843.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr18-10762977-A-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIEZO2	NM_001378183.1	c.3068T>C	p.Met1023Thr	missense_variant	22/56	ENST00000674853.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIEZO2	ENST00000674853.1	c.3068T>C	p.Met1023Thr	missense_variant	22/56		NM_001378183.1

Frequencies

GnomAD3 genomes Cov.: 36

GnomAD4 exome Cov.: 60

GnomAD4 genome Cov.: 36

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Arthrogryposis- oculomotor limitation-electroretinal anomalies syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

research

University of Washington Center for Mendelian Genomics, University of Washington

Jun 04, 2014

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.20
CADD	Uncertain	25
DANN	Benign	0.89
DEOGEN2	Benign	0.26	.;T;.;T
Eigen	Pathogenic	0.85
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D;D;D
M_CAP	Pathogenic	0.39	D
MetaRNN	Pathogenic	0.87	D;D;D;D
MetaSVM	Uncertain	-0.23	T
MutationAssessor	Pathogenic	3.2	M;.;.;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-5.4	D;.;.;.
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0010	D;.;.;.
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.99	.;.;D;.
Vest4		0.76
MutPred		0.69		Loss of helix (P = 0.079);.;.;Loss of helix (P = 0.079);
MVP		0.21
MPC		1.1
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.84
gMVP		0.96

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

Publications

LitVar

Other links and lift over

dbSNP: rs878853140; hg19: chr18-10762975;