18-10761477-G-T

Variant names:

• chr18-10761477-G-T
• rs1343886
• NM_001378183.1:c.3250-366C>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001378183.1(PIEZO2):​c.3250-366C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.207 in 152,036 control chromosomes in the GnomAD database, including 3,945 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.21 (3945 hom., cov: 32)
• Consequence: PIEZO2 NM_001378183.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.97
• 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: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
• arthrogryposis, distal, with impaired proprioception and touch

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

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

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

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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.271 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIEZO2	NM_001378183.1	c.3250-366C>A		intron_variant	Intron 23 of 55	ENST00000674853.1	NP_001365112.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIEZO2	ENST00000674853.1	c.3250-366C>A		intron_variant	Intron 23 of 55		NM_001378183.1	ENSP00000501957.1

Frequencies

GnomAD3 genomes AF: 0.207 AC: 31463 AN: 151916 Hom.: 3936 Cov.: 32

Gnomad AFR AF: 0.0630

Gnomad AMI AF: 0.115

Gnomad AMR AF: 0.271

Gnomad ASJ AF: 0.320

Gnomad EAS AF: 0.244

Gnomad SAS AF: 0.284

Gnomad FIN AF: 0.298

Gnomad MID AF: 0.196

Gnomad NFE AF: 0.253

Gnomad OTH AF: 0.231

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.207 AC: 31480 AN: 152036 Hom.: 3945 Cov.: 32 AF XY: 0.211 AC XY: 15640 AN XY: 74288

African (AFR) AF: 0.0629 AC: 2609 AN: 41504

American (AMR) AF: 0.272 AC: 4150 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.320 AC: 1109 AN: 3470

East Asian (EAS) AF: 0.244 AC: 1263 AN: 5172

South Asian (SAS) AF: 0.284 AC: 1366 AN: 4816

European-Finnish (FIN) AF: 0.298 AC: 3137 AN: 10540

Middle Eastern (MID) AF: 0.211 AC: 62 AN: 294

European-Non Finnish (NFE) AF: 0.253 AC: 17196 AN: 67942

Other (OTH) AF: 0.229 AC: 483 AN: 2108

Alfa AF: 0.236 Hom.: 8305

Bravo AF: 0.199

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	0.075
DANN	Benign	0.46
PhyloP100		-2.0
Mutation Taster		=100/0	polymorphism (auto)

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: rs1343886; hg19: chr18-10761475;