2-169509931-GTCAGC-G

Variant names:

• chr2-169509931-GTCAGC-G
• NM_006063.3:c.155_159delCAGCT

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_006063.3(KLHL41):​c.155_159delCAGCT​(p.Ser52LeufsTer2) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KLHL41 NM_006063.3 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.60

Genes affected

KLHL41 (HGNC:16905): (kelch like family member 41) This gene is a member of the kelch-like family. The encoded protein contains a BACK domain, a BTB/POZ domain, and 5 Kelch repeats. This protein is thought to function in skeletal muscle development and maintenance. Mutations in this gene have been associated with nemaline myopathy (NM), a rare congenital muscle disorder. [provided by RefSeq, Mar 2015]

ENSG00000251569 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-169509931-GTCAGC-G is Pathogenic according to our data. Variant chr2-169509931-GTCAGC-G is described in ClinVar as [Pathogenic]. Clinvar id is 1982923.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KLHL41	NM_006063.3	c.155_159delCAGCT	p.Ser52LeufsTer2	frameshift_variant	Exon 1 of 6	ENST00000284669.2	NP_006054.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KLHL41	ENST00000284669.2	c.155_159delCAGCT	p.Ser52LeufsTer2	frameshift_variant	Exon 1 of 6	1	NM_006063.3	ENSP00000284669.1
ENSG00000251569	ENST00000513963.1	c.925-4641_925-4637delCAGCT		intron_variant	Intron 11 of 15	2		ENSP00000424363.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nemaline myopathy 9 Pathogenic:1

Oct 17, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. This variant has not been reported in the literature in individuals affected with KLHL41-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Ser52Leufs*2) in the KLHL41 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in KLHL41 are known to be pathogenic (PMID: 24268659). -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-170366441;