Genetic Variant KRT74:p.Asn148Lys (chr12-52573334-G-C) – ACMG Classification: Likely_pathogenic (7 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP3_StrongPP5

The NM_175053.4(KRT74):c.444C>G(p.Asn148Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,614,050 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

KRT74
NM_175053.4 missense

Scores

Clinical Significance

Pathogenic no assertion criteria provided P:1O:1

Conservation

PhyloP100: 1.46

Variant links:

Genes affected

KRT74 (HGNC:28929): (keratin 74) Keratins are intermediate filament proteins responsible for the structural integrity of epithelial cells and are subdivided into epithelial keratins and hair keratins. This protein belongs to a family of keratins that are specifically expressed in the inner root sheath of hair follicles.[provided by RefSeq, Jun 2009]

KRT74 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.99

PP5

Variant 12-52573334-G-C is Pathogenic according to our data. Variant chr12-52573334-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 2460.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr12-52573334-G-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRT74	NM_175053.4 link	c.444C>G	p.Asn148Lys	missense_variant	Exon 1 of 9	ENST00000305620.3	NP_778223.2	Q7RTS7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRT74	ENST00000305620.3 link	c.444C>G	p.Asn148Lys	missense_variant	Exon 1 of 9	1	NM_175053.4	ENSP00000307240.2		Q7RTS7
KRT74	ENST00000549343.5 link	c.444C>G	p.Asn148Lys	missense_variant	Exon 1 of 10	5		ENSP00000447447.1		F8W1S1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461884

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727246

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152166

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1Other:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Autosomal dominant wooly hair

Pathogenic:1

Apr 09, 2010

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

not provided

Other:1

Epithelial Biology; Institute of Medical Biology, Singapore

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Uncertain

0.050

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.87

D;D

Eigen

Benign

-0.056

Eigen_PC

Benign

-0.31

FATHMM_MKL

Uncertain

0.93

LIST_S2

Pathogenic

0.97

D;D

M_CAP

Uncertain

0.28

MetaRNN

Pathogenic

0.99

D;D

MetaSVM

Pathogenic

0.94

MutationAssessor

Pathogenic

4.3

.;H

PrimateAI

Uncertain

0.67

PROVEAN

Pathogenic

-5.8

D;D

REVEL

Uncertain

0.56

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.97

MutPred

0.85

Loss of ubiquitination at K150 (P = 0.027);Loss of ubiquitination at K150 (P = 0.027);

MVP

0.61

MPC

0.42

ClinPred

1.0

GERP RS

-3.5

Varity_R

0.62

gMVP

0.85

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