NM_017644.3:c.383A>G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_017644.3(KLHL24):c.383A>G(p.Lys128Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000434 in 1,614,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

KLHL24
NM_017644.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 5.99

Publications

0 publications found

Variant links:

Genes affected

KLHL24 (HGNC:25947): (kelch like family member 24) The protein encoded by this gene is a ubiquitin ligase substrate receptor and is regulated by autoubiquitination. Variations in the translation initiation codon of this gene have been found, which result in an N-terminally truncated but more stable protein due to loss of the autoubiquitination function. The more stable mutant protein causes an increased ubiquitin and degradation of keratin 14, which leads to skin fragility and the potentially life-threatening disease epidermolysis bullosa. The encoded protein is also involved in the regulation of kainate receptors. [provided by RefSeq, Mar 2017]

KLHL24 Gene-Disease associations (from GenCC):

epidermolysis bullosa simplex 6, generalized, with scarring and hair loss
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, PanelApp Australia, Ambry Genetics, Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)
cardiomyopathy, familial hypertrophic, 29, with polyglucosan bodies
Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
hypertrophic cardiomyopathy
Inheritance: AR Classification: MODERATE Submitted by: ClinGen

KLHL24 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.20047998).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KLHL24	NM_017644.3 link	c.383A>G	p.Lys128Arg	missense_variant	Exon 3 of 8	ENST00000242810.11	NP_060114.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KLHL24	ENST00000242810.11 link	c.383A>G	p.Lys128Arg	missense_variant	Exon 3 of 8	1	NM_017644.3	ENSP00000242810.6		Q6TFL4-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152208

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:

0.000478

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251372

AF XY:

0.00000736

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461752

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727174

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53330

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111966

Other (OTH)

AF:

0.0000662

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.563

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41584

American (AMR)

AF:

0.00

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cardiomyopathy, familial hypertrophic, 29, with polyglucosan bodies

Uncertain:1

Oct 08, 2024

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3B. Following criteria are met: 0103 - Loss of function and gain of function are known mechanisms of disease in this gene and are associated with cardiomyopathy with lethal arrhythmias (PMID: 30715372) and epidermolysis bullosa simplex, generalized, with scarring and hair loss (MIM#617294), respectively. Heterozygous start-loss variants resulting in reduced protein degradation have been reported in individuals with the epidermolysis bullosa phenotype, while biallelic loss of function variants are suggested to result in a cardiac condition (PMID: 30715372, PMID: 27889062). (I) 0108 - This gene is associated with both recessive and dominant disease. Start-loss variants with a gain of function affect are associated with epidermolysis bullosa simplex 6, and loss of function variants are associated with cardiomyopathy (PMID: 27889062; PMID: 30715372). (I) 0200 - Variant is predicted to result in a missense amino acid change from lysine to arginine. (I) 0252 - This variant is homozygous. (I) 0304 - Variant is present in gnomAD <0.01 for a recessive condition (v2 + v3: 2 heterozygotes, 0 homozygotes). (SP) 0309 - An alternative amino acid change at the same position has been observed in gnomAD (v3) (1 heterozygote, 0 homozygotes). (I) 0503 - Missense variant consistently predicted to be tolerated by multiple in silico tools or not conserved in placental mammals with a minor amino acid change. (SB) 0600 - Variant is located in the annotated BTB/POZ domain (DECIPHER). (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0807 - This variant has no previous evidence of pathogenicity. (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Inborn genetic diseases

Uncertain:1

Oct 10, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.383A>G (p.K128R) alteration is located in exon 3 (coding exon 1) of the KLHL24 gene. This alteration results from a A to G substitution at nucleotide position 383, causing the lysine (K) at amino acid position 128 to be replaced by an arginine (R). 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

0.065

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.48

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.089

T;.;T;.

Eigen

Benign

-0.12

Eigen_PC

Benign

0.097

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.86

.;D;T;T

M_CAP

Benign

0.0052

MetaRNN

Benign

0.20

T;T;T;T

MetaSVM

Benign

-0.93

MutationAssessor

Benign

0.075

N;.;N;N

PhyloP100

6.0

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-0.56

N;N;N;N

REVEL

Benign

0.10

Sift

Benign

0.47

T;T;T;T

Sift4G

Benign

0.68

T;T;T;T

Polyphen

0.0010

B;.;B;B

Vest4

0.11

MutPred

0.42

Loss of ubiquitination at K128 (P = 0.0362);Loss of ubiquitination at K128 (P = 0.0362);Loss of ubiquitination at K128 (P = 0.0362);Loss of ubiquitination at K128 (P = 0.0362);

MVP

0.62

MPC

0.56

ClinPred

0.15

GERP RS

5.4

PromoterAI

0.051

Neutral

(source)

Varity_R

0.093

gMVP

0.31

Mutation Taster

=88/12

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over