Genetic Variant PIEZO2:c.1239+13T>A (chr18-10801377-A-T) – ACMG Classification: Benign (-18 pts)

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_001378183.1(PIEZO2):c.1239+13T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000467 in 1,474,866 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0025 ( 2 hom., cov: 33)

Exomes 𝑓: 0.00023 ( 0 hom. )

Consequence

PIEZO2
NM_001378183.1 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 2.92

Publications

0 publications found

Variant links:

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

PIEZO2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.23).

BP6

Variant 18-10801377-A-T is Benign according to our data. Variant chr18-10801377-A-T is described in ClinVar as Benign. ClinVar VariationId is 261497.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0025 (381/152350) while in subpopulation AFR AF = 0.00861 (358/41580). AF 95% confidence interval is 0.00787. There are 2 homozygotes in GnomAd4. There are 159 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AD,AR gene

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

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
PIEZO2	NM_001378183.1	MANE Select	c.1239+13T>A	intron	N/A	NP_001365112.1
PIEZO2	NM_001410871.1		c.1239+13T>A	intron	N/A	NP_001397800.1
PIEZO2	NM_022068.4		c.1239+13T>A	intron	N/A	NP_071351.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
PIEZO2	ENST00000674853.1	MANE Select	c.1239+13T>A	intron	N/A	ENSP00000501957.1
PIEZO2	ENST00000503781.7	TSL:1	c.1239+13T>A	intron	N/A	ENSP00000421377.3
PIEZO2	ENST00000580640.5	TSL:5	c.1239+13T>A	intron	N/A	ENSP00000463094.1

Frequencies

GnomAD3 genomes

AF:

0.00250

AC:

380

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00861

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000982

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000480

AC:

AN:

145746

AF XY:

0.000336

show subpopulations

Gnomad AFR exome

AF:

0.00828

Gnomad AMR exome

AF:

0.000204

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000233

AC:

308

AN:

1322516

Hom.:

Cov.:

AF XY:

0.000180

AC XY:

118

AN XY:

655202

show subpopulations

African (AFR)

AF:

0.00910

AC:

274

AN:

30106

American (AMR)

AF:

0.000197

AC:

AN:

35542

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24808

East Asian (EAS)

AF:

0.00

AC:

AN:

35398

South Asian (SAS)

AF:

0.00

AC:

AN:

77806

European-Finnish (FIN)

AF:

0.00

AC:

AN:

35202

Middle Eastern (MID)

AF:

0.000538

AC:

AN:

5576

European-Non Finnish (NFE)

AF:

0.00000196

AC:

AN:

1022018

Other (OTH)

AF:

0.000392

AC:

AN:

56060

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00250

AC:

381

AN:

152350

Hom.:

Cov.:

AF XY:

0.00213

AC XY:

159

AN XY:

74510

show subpopulations

African (AFR)

AF:

0.00861

AC:

358

AN:

41580

American (AMR)

AF:

0.000980

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68030

Other (OTH)

AF:

0.00237

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000257

Hom.:

Bravo

AF:

0.00306

Asia WGS

AF:

0.000289

AC:

AN:

3474

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.23

CADD

Benign

(source)

DANN

Benign

0.74

PhyloP100

2.9

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over