rs77688767

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_000226.4(KRT9):c.1216T>C(p.Cys406Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000517 in 1,614,182 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00058 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00051 ( 5 hom. )

Consequence

KRT9
NM_000226.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3O:1

Conservation

PhyloP100: -0.118

Publications

4 publications found

Variant links:

Genes affected

KRT9 (HGNC:6447): (keratin 9) This gene encodes the type I keratin 9, an intermediate filament chain expressed only in the terminally differentiated epidermis of palms and soles. Mutations in this gene cause epidermolytic palmoplantar keratoderma. [provided by RefSeq, Jul 2008]

KRT9 Gene-Disease associations (from GenCC):

epidermolytic palmoplantar keratoderma, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)

KRT9 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012534499).

BP6

Variant 17-41568340-A-G is Benign according to our data. Variant chr17-41568340-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 66145.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000584 (89/152290) while in subpopulation EAS AF = 0.016 (83/5188). AF 95% confidence interval is 0.0132. There are 0 homozygotes in GnomAd4. There are 46 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High AC in GnomAd4 at 89 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRT9	NM_000226.4 link	c.1216T>C	p.Cys406Arg	missense_variant	Exon 6 of 8	ENST00000246662.9	NP_000217.2	P35527

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRT9	ENST00000246662.9 link	c.1216T>C	p.Cys406Arg	missense_variant	Exon 6 of 8	1	NM_000226.4	ENSP00000246662.4		P35527
KRT9	ENST00000588431.1 link	c.517T>C	p.Cys173Arg	missense_variant	Exon 7 of 9	1		ENSP00000467932.1		K7EQQ3

Frequencies

GnomAD3 genomes

AF:

0.000598

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0163

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.00123

AC:

309

AN:

251492

AF XY:

0.00117

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0158

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000439

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000510

AC:

746

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000539

AC XY:

392

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0163

AC:

647

AN:

39700

South Asian (SAS)

AF:

0.000475

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000171

AC:

AN:

1112012

Other (OTH)

AF:

0.000629

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

104

157

209

261

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.000584

AC:

AN:

152290

Hom.:

Cov.:

AF XY:

0.000618

AC XY:

AN XY:

74464

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41566

American (AMR)

AF:

0.0000654

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.0160

AC:

AN:

5188

South Asian (SAS)

AF:

0.000208

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68012

Other (OTH)

AF:

0.000947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000576

Hom.:

Bravo

AF:

0.000941

ExAC

AF:

0.00118

AC:

143

Asia WGS

AF:

0.00549

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Palmoplantar keratoderma, epidermolytic

Uncertain:2Benign:1

May 28, 2019

Mendelics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Mar 18, 2016

Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:reference population

- -

not provided

Benign:1Other:1

Epithelial Biology; Institute of Medical Biology, Singapore

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Dec 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

KRT9-related disorder

Benign:1

Jun 28, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.54

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.23

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.76

D;D

Eigen

Benign

0.0094

Eigen_PC

Benign

-0.11

FATHMM_MKL

Benign

0.25

LIST_S2

Benign

0.47

T;T

MetaRNN

Benign

0.013

T;T

MetaSVM

Uncertain

-0.0049

MutationAssessor

Uncertain

2.5

M;.

PhyloP100

-0.12

PrimateAI

Benign

0.36

PROVEAN

Pathogenic

-4.9

D;.

REVEL

Pathogenic

0.81

Sift

Uncertain

0.0060

D;.

Sift4G

Benign

0.53

T;T

Polyphen

0.97

D;.

Vest4

0.32

MVP

0.93

MPC

0.53

ClinPred

0.15

GERP RS

2.7

Varity_R

0.75

gMVP

0.36

Mutation Taster

=67/33

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over