Genetic Variant KLHL40:p.Ala8Glu (chr3-42685641-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_152393.4(KLHL40):c.23C>A(p.Ala8Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000689 in 1,451,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A8V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

KLHL40
NM_152393.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.192

Publications

0 publications found

Variant links:

Genes affected

KLHL40 (HGNC:30372): (kelch like family member 40) This gene encodes a protein containing a BACK domain, a BTB/POZ domain, and 5 Kelch repeats, however, its exact function is not known. The gene and the multi-domain protein structure are conserved across different taxa, including primates, rodents, chicken and zebrafish. [provided by RefSeq, Dec 2012]

KLHL40 Gene-Disease associations (from GenCC):

nemaline myopathy 8
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
severe congenital nemaline myopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

KLHL40 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.072574854).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_152393.4. 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
	KLHL40	NM_152393.4	MANE Select	c.23C>A	p.Ala8Glu	missense	Exon 1 of 6	NP_689606.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KLHL40	ENST00000287777.5	TSL:1 MANE Select	c.23C>A	p.Ala8Glu	missense	Exon 1 of 6	ENSP00000287777.4	Q2TBA0-1
KLHL40	ENST00000942348.1		c.23C>A	p.Ala8Glu	missense	Exon 1 of 6	ENSP00000612407.1
KLHL40	ENST00000942349.1		c.23C>A	p.Ala8Glu	missense	Exon 1 of 6	ENSP00000612408.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.89e-7

AC:

AN:

1451886

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

721500

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33220

American (AMR)

AF:

0.00

AC:

AN:

43748

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25844

East Asian (EAS)

AF:

0.00

AC:

AN:

39048

South Asian (SAS)

AF:

0.00

AC:

AN:

84812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51840

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5742

European-Non Finnish (NFE)

AF:

9.03e-7

AC:

AN:

1107660

Other (OTH)

AF:

0.00

AC:

AN:

59972

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.095

BayesDel_noAF

Benign

-0.37

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.028

Eigen

Benign

-0.49

Eigen_PC

Benign

-0.41

FATHMM_MKL

Benign

0.32

LIST_S2

Benign

0.68

M_CAP

Benign

0.041

MetaRNN

Benign

0.073

MetaSVM

Benign

-0.88

MutationAssessor

Benign

0.67

PhyloP100

0.19

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-1.1

REVEL

Benign

0.046

Sift

Benign

0.041

Sift4G

Benign

0.12

Polyphen

0.053

Vest4

0.21

MutPred

0.35

Gain of helix (P = 0.0022)

MVP

0.56

MPC

0.77

ClinPred

0.12

GERP RS

2.6

PromoterAI

0.016

Neutral

(source)

Varity_R

0.22

gMVP

0.62

Mutation Taster

=89/11

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over