12-52286388-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_002281.4(KRT81):c.1385C>A(p.Ala462Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000309 in 1,555,200 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A462V) has been classified as Benign.

Frequency

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

Exomes 𝑓: 0.000033 ( 0 hom. )

Consequence

KRT81
NM_002281.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.415

Variant links:

Genes affected

KRT81 (HGNC:6458): (keratin 81) The protein encoded by this gene is a member of the keratin gene family. As a type II hair keratin, it is a basic protein which heterodimerizes with type I keratins to form hair and nails. The type II hair keratins are clustered in a region of chromosome 12q13 and are grouped into two distinct subfamilies based on structure similarity. One subfamily, consisting of KRTHB1, KRTHB3, and KRTHB6, is highly related. The other less-related subfamily includes KRTHB2, KRTHB4, and KRTHB5. All hair keratins are expressed in the hair follicle; this hair keratin, as well as KRTHB3 and KRTHB6, is found primarily in the hair cortex. Mutations in this gene and KRTHB6 have been observed in patients with a rare dominant hair disease, monilethrix. Some human genome assemblies (example T2T-CHM13) have a non-coding version of the gene due to the presence of a SNP that introduces a premature stop codon after codon 281. [provided by RefSeq, Jan 2024]

KRT81 links:

KRT86 (HGNC:6463): (keratin 86) This gene encodes a type II keratin protein, which heterodimerizes with type I keratins to form hair and nails. This gene is present in a cluster of related genes and pseudogenes on chromosome 12. Mutations in this gene have been observed in patients with the hair disease monilethrix. [provided by RefSeq, Feb 2016]

KRT86 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.24038455).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
KRT81	NM_002281.4 linkuse as main transcript	c.1385C>A	p.Ala462Glu	missense_variant	9/9	ENST00000327741.9
KRT86	NM_001320198.2 linkuse as main transcript	c.-5+10442G>T		intron_variant		ENST00000423955.7
KRT81	XM_047428838.1 linkuse as main transcript	c.1385C>A	p.Ala462Glu	missense_variant	10/10
KRT86	XM_005268866.5 linkuse as main transcript	c.129+10442G>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
KRT81	ENST00000327741.9 linkuse as main transcript	c.1385C>A	p.Ala462Glu	missense_variant	9/9	1	NM_002281.4	P1
KRT86	ENST00000423955.7 linkuse as main transcript	c.-5+10442G>T		intron_variant		2	NM_001320198.2	P1
KRT86	ENST00000553310.6 linkuse as main transcript	c.-4-15525G>T		intron_variant		4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152188

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.00000633

AC:

AN:

158094

Hom.:

AF XY:

0.00

AC XY:

AN XY:

83656

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:

0.0000165

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000335

AC:

AN:

1403012

Hom.:

Cov.:

AF XY:

0.0000361

AC XY:

AN XY:

692386

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:

0.0000416

Gnomad4 OTH exome

AF:

0.0000344

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74350

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000479

Bravo

AF:

0.0000151

ExAC

AF:

0.0000268

AC:

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

Jan 08, 2024

The c.1385C>A (p.A462E) alteration is located in exon 9 (coding exon 9) of the KRT81 gene. This alteration results from a C to A substitution at nucleotide position 1385, causing the alanine (A) at amino acid position 462 to be replaced by a glutamic acid (E). 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

0.25

BayesDel_addAF

Benign

0.0097

BayesDel_noAF

Benign

-0.21

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.073

T;.

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.26

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.74

T;T

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.24

T;T

MetaSVM

Benign

-0.56

MutationAssessor

Benign

1.9

L;.

MutationTaster

Benign

1.0

D;N

PrimateAI

Benign

0.34

PROVEAN

Benign

-2.1

N;.

REVEL

Uncertain

0.50

Sift

Benign

0.067

T;.

Sift4G

Benign

0.27

T;T

Polyphen

0.55

P;.

Vest4

0.33

MutPred

0.36

Gain of catalytic residue at T465 (P = 8e-04);Gain of catalytic residue at T465 (P = 8e-04);

MVP

0.55

MPC

1.0

ClinPred

0.72

GERP RS

2.3

Varity_R

0.13

gMVP

0.27

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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