1-201294011-A-G

Position:

chr1-201294011-A-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_001005337.3(PKP1):c.272A>G(p.Lys91Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000197 in 1,613,716 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00021 ( 1 hom. )

Consequence

PKP1
NM_001005337.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.23

Variant links:

Genes affected

PKP1 (HGNC:9023): (plakophilin 1) This gene encodes a member of the arm-repeat (armadillo) and plakophilin gene families. Plakophilin proteins contain numerous armadillo repeats, localize to cell desmosomes and nuclei, and participate in linking cadherins to intermediate filaments in the cytoskeleton. This protein may be involved in molecular recruitment and stabilization during desmosome formation. Mutations in this gene have been associated with the ectodermal dysplasia/skin fragility syndrome. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2010]

PKP1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.104103565).

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000212 (310/1461402) while in subpopulation NFE AF= 0.000275 (306/1111628). AF 95% confidence interval is 0.000249. There are 1 homozygotes in gnomad4_exome. There are 151 alleles in male gnomad4_exome subpopulation. Median coverage is 30. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PKP1	NM_001005337.3 linkuse as main transcript	c.272A>G	p.Lys91Arg	missense_variant	2/14	ENST00000367324.8
PKP1	NM_000299.4 linkuse as main transcript	c.272A>G	p.Lys91Arg	missense_variant	2/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKP1	ENST00000367324.8 linkuse as main transcript	c.272A>G	p.Lys91Arg	missense_variant	2/14	1	NM_001005337.3	P1	Q13835-2
PKP1	ENST00000263946.7 linkuse as main transcript	c.272A>G	p.Lys91Arg	missense_variant	2/15	5			Q13835-1
PKP1	ENST00000352845.3 linkuse as main transcript	c.272A>G	p.Lys91Arg	missense_variant	2/14	5			Q13835-1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000438

AC:

AN:

251088

Hom.:

AF XY:

0.0000663

AC XY:

AN XY:

135718

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000969

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000212

AC:

310

AN:

1461402

Hom.:

Cov.:

AF XY:

0.000208

AC XY:

151

AN XY:

727032

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000275

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.0000525

AC:

AN:

152314

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74478

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000767

Hom.:

Bravo

AF:

0.0000491

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2022

The c.272A>G (p.K91R) alteration is located in exon 2 (coding exon 2) of the PKP1 gene. This alteration results from a A to G substitution at nucleotide position 272, causing the lysine (K) at amino acid position 91 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.35

CADD

Benign

DANN

Uncertain

1.0

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.11

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.74

T;T;.

M_CAP

Benign

0.011

MetaRNN

Benign

0.10

T;T;T

MetaSVM

Benign

-0.87

MutationAssessor

Benign

0.46

N;N;N

MutationTaster

Benign

0.80

D;D;D

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-0.68

N;N;N

REVEL

Benign

0.073

Sift

Benign

0.46

T;T;T

Sift4G

Benign

0.40

T;T;T

Polyphen

0.0020

B;B;B

Vest4

0.35

MVP

0.73

MPC

0.075

ClinPred

0.11

GERP RS

4.7

Varity_R

0.073

gMVP

0.33

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over