12-52286461-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_002281.4(KRT81):c.1312G>A(p.Gly438Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000198 in 1,552,592 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00021 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00020 ( 1 hom. )

Consequence

KRT81
NM_002281.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1B:1

Conservation

PhyloP100: 1.98

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 -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.07796782).

BS2

High AC in GnomAd4 at 32 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRT81	NM_002281.4 link	c.1312G>A	p.Gly438Arg	missense_variant	Exon 9 of 9	ENST00000327741.9	NP_002272.2	Q14533
KRT86	NM_001320198.2 link	c.-5+10515C>T		intron_variant	Intron 2 of 10	ENST00000423955.7	NP_001307127.1	O43790A8K872
KRT86	XM_005268866.5 link	c.129+10515C>T		intron_variant	Intron 2 of 10		XP_005268923.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KRT81	ENST00000327741.9 link	c.1312G>A	p.Gly438Arg	missense_variant	Exon 9 of 9	1	NM_002281.4	ENSP00000369349.4	Q14533
KRT86	ENST00000423955.7 link	c.-5+10515C>T		intron_variant	Intron 2 of 10	2	NM_001320198.2	ENSP00000444533.1	O43790
KRT86	ENST00000553310.6 link	c.-4-15452C>T		intron_variant	Intron 1 of 2	4		ENSP00000452237.3	U3KPR1

Frequencies

GnomAD3 genomes

AF:

0.000210

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00519

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000371

AC:

AN:

153596

Hom.:

AF XY:

0.000343

AC XY:

AN XY:

81662

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000160

Gnomad ASJ exome

AF:

0.00379

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000611

Gnomad FIN exome

AF:

0.0000646

Gnomad NFE exome

AF:

0.0000698

Gnomad OTH exome

AF:

0.000455

GnomAD4 exome

AF:

0.000197

AC:

276

AN:

1400294

Hom.:

Cov.:

AF XY:

0.000203

AC XY:

140

AN XY:

690850

show subpopulations

Gnomad4 AFR exome

AF:

0.0000316

Gnomad4 AMR exome

AF:

0.000111

Gnomad4 ASJ exome

AF:

0.00488

Gnomad4 EAS exome

AF:

0.0000279

Gnomad4 SAS exome

AF:

0.000555

Gnomad4 FIN exome

AF:

0.0000612

Gnomad4 NFE exome

AF:

0.0000639

Gnomad4 OTH exome

AF:

0.000517

GnomAD4 genome

AF:

0.000210

AC:

AN:

152298

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00519

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000621

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000491

Hom.:

Bravo

AF:

0.000196

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000238

AC:

ExAC

AF:

0.000203

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 01, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1312G>A (p.G438R) alteration is located in exon 9 (coding exon 9) of the KRT81 gene. This alteration results from a G to A substitution at nucleotide position 1312, causing the glycine (G) at amino acid position 438 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

KRT81-related disorder

Benign:1

Aug 16, 2019

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

0.35

BayesDel_addAF

Benign

-0.0015

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.32

T;.

Eigen

Uncertain

0.52

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Benign

0.66

LIST_S2

Uncertain

0.90

D;D

M_CAP

Pathogenic

0.35

MetaRNN

Benign

0.078

T;T

MetaSVM

Uncertain

0.55

MutationAssessor

Uncertain

2.5

M;.

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-4.9

D;.

REVEL

Pathogenic

0.69

Sift

Uncertain

0.0010

D;.

Sift4G

Uncertain

0.0090

D;D

Polyphen

1.0

D;.

Vest4

0.63

MutPred

0.41

Gain of catalytic residue at V436 (P = 0);Gain of catalytic residue at V436 (P = 0);

MVP

0.78

MPC

1.2

ClinPred

0.20

GERP RS

4.8

Varity_R

0.30

gMVP

0.16

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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