Variant 17-40983883-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001389244.1(KRT40):c.391A>G(p.Met131Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000263 in 1,614,010 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00027 ( 0 hom. )

Consequence

KRT40
NM_001389244.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -5.48

Variant links:

Genes affected

KRT40 (HGNC:26707): (keratin 40) This gene encodes a member of the type I (acidic) keratin family, which belongs to the superfamily of intermediate filament (IF) proteins. Keratins are heteropolymeric structural proteins which form the intermediate filament. These filaments, along with actin microfilaments and microtubules, compose the cytoskeleton of epithelial cells. The type I keratin genes are clustered in a region of chromosome 17q12-q21. [provided by RefSeq, Jul 2009]

KRT40 links:

LOC107985072 (HGNC:):

LOC107985072 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.026809424).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRT40	NM_001389244.1 linkuse as main transcript	c.391A>G	p.Met131Val	missense_variant	1/7	ENST00000377755.9	NP_001376173.1
LOC107985072	XR_001752886.2 linkuse as main transcript			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
KRT40	ENST00000377755.9 linkuse as main transcript	c.391A>G	p.Met131Val	missense_variant	1/7	1	NM_001389244.1	ENSP00000366984	P1
KRT40	ENST00000398486.2 linkuse as main transcript	c.391A>G	p.Met131Val	missense_variant	3/9	1		ENSP00000381500	P1
KRT40	ENST00000684280.1 linkuse as main transcript	c.391A>G	p.Met131Val	missense_variant	3/9			ENSP00000506768	P1
KRT40	ENST00000461923.5 linkuse as main transcript	c.391A>G	p.Met131Val	missense_variant, NMD_transcript_variant	3/9	2		ENSP00000434458

Frequencies

GnomAD3 genomes

AF:

0.000164

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000189

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000132

AC:

AN:

249766

Hom.:

AF XY:

0.000140

AC XY:

AN XY:

135446

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:

0.000510

Gnomad NFE exome

AF:

0.000177

Gnomad OTH exome

AF:

0.000330

GnomAD4 exome

AF:

0.000273

AC:

399

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000254

AC XY:

185

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000449

Gnomad4 NFE exome

AF:

0.000326

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000164

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74296

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000189

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000153

Hom.:

Bravo

AF:

0.000132

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000350

AC:

ExAC

AF:

0.000148

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 03, 2022

The c.391A>G (p.M131V) alteration is located in exon 3 (coding exon 1) of the KRT40 gene. This alteration results from a A to G substitution at nucleotide position 391, causing the methionine (M) at amino acid position 131 to be replaced by a valine (V). 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

0.052

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.59

CADD

Benign

0.0020

DANN

Benign

0.33

DEOGEN2

Benign

0.051

T;T

Eigen

Benign

-1.9

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.017

M_CAP

Benign

0.019

MetaRNN

Benign

0.027

T;T

MetaSVM

Benign

-0.70

MutationAssessor

Benign

-1.1

N;N

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.22

PROVEAN

Benign

0.16

N;N

REVEL

Benign

0.18

Sift

Benign

0.54

T;T

Sift4G

Benign

0.51

T;T

Polyphen

0.0

B;B

Vest4

0.035

MVP

0.15

MPC

0.11

ClinPred

0.052

GERP RS

-8.0

Varity_R

0.055

gMVP

0.066

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