rs150739493

Variant names:

• chr3-183650503-C-T
• rs150739493
• NM_017644.3:c.147C>T

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6_Moderate BS1

The NM_001349428.1(KLHL24):​c.-820C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000184 in 1,613,998 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 Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000099 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00019 (1 hom.)
• Consequence: KLHL24 NM_001349428.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.139
• Publications: 1 publications found

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: Genomics England PanelApp, Ambry Genetics, Orphanet, G2P, PanelApp Australia, 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

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.6).
• BP6: Variant 3-183650503-C-T is Benign according to our data. Variant chr3-183650503-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2919801.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0000986 (15/152152) while in subpopulation NFE AF = 0.000191 (13/68010). AF 95% confidence interval is 0.000112. There are 0 homozygotes in GnomAd4. There are 7 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001349428.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KLHL24	NM_017644.3	MANE Select	c.147C>T	p.Ala49Ala	synonymous	Exon 3 of 8	NP_060114.2	Q6TFL4-1
	KLHL24	NM_001349428.1		c.-820C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 9	NP_001336357.1
	KLHL24	NM_001349429.1		c.-820C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 9	NP_001336358.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KLHL24	ENST00000242810.11	TSL:1 MANE Select	c.147C>T	p.Ala49Ala	synonymous	Exon 3 of 8	ENSP00000242810.6	Q6TFL4-1
	KLHL24	ENST00000454652.6	TSL:1	c.147C>T	p.Ala49Ala	synonymous	Exon 4 of 9	ENSP00000395012.1	Q6TFL4-1
	KLHL24	ENST00000943871.1		c.147C>T	p.Ala49Ala	synonymous	Exon 3 of 10	ENSP00000613930.1

Frequencies

GnomAD3 genomes AF: 0.0000987 AC: 15 AN: 152034 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000484

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: 0.000191

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000955 AC: 24 AN: 251394 AF XY: 0.0000883

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.000185

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000193 AC: 282 AN: 1461846 Hom.: 1 Cov.: 34 AF XY: 0.000187 AC XY: 136 AN XY: 727230

African (AFR) AF: 0.0000597 AC: 2 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86254

European-Finnish (FIN) AF: 0.0000374 AC: 2 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.000234 AC: 260 AN: 1111974

Other (OTH) AF: 0.000281 AC: 17 AN: 60396

GnomAD4 genome AF: 0.0000986 AC: 15 AN: 152152 Hom.: 0 Cov.: 32 AF XY: 0.0000941 AC XY: 7 AN XY: 74388

African (AFR) AF: 0.0000482 AC: 2 AN: 41484

American (AMR) AF: 0.00 AC: 0 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5186

South Asian (SAS) AF: 0.00 AC: 0 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10592

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000191 AC: 13 AN: 68010

Other (OTH) AF: 0.00 AC: 0 AN: 2112

Alfa AF: 0.000141 Hom.: 0

Bravo AF: 0.000113

EpiCase AF: 0.000109

EpiControl AF: 0.000119

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.60
CADD	Benign	12
DANN	Benign	0.83
PhyloP100		-0.14
PromoterAI		0.015	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

Other links and lift over

dbSNP: rs150739493; hg19: chr3-183368291;