Genetic Variant KLHL20:p.Glu16Ala (chr1-173733736-A-C) – 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_014458.4(KLHL20):c.47A>C(p.Glu16Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,480 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: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

KLHL20
NM_014458.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.28

Publications

0 publications found

Variant links:

Genes affected

KLHL20 (HGNC:25056): (kelch like family member 20) The protein encoded by this gene is a member of the kelch family of proteins, which is characterized by a 44-56 amino acid repeat motif. The kelch motif appears in many different polypeptide contexts and contains multiple potential protein-protein contact sites. Members of this family are present both throughout the cell and extracellularly, with diverse activities. [provided by RefSeq, Jul 2008]

KLHL20 Gene-Disease associations (from GenCC):

neurodevelopmental disorder
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
complex neurodevelopmental disorder
Inheritance: AD Classification: MODERATE Submitted by: G2P

KLHL20 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=0.1894502).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KLHL20	NM_014458.4 link	c.47A>C	p.Glu16Ala	missense_variant	Exon 3 of 12	ENST00000209884.5	NP_055273.2	Q9Y2M5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KLHL20	ENST00000209884.5 link	c.47A>C	p.Glu16Ala	missense_variant	Exon 3 of 12	1	NM_014458.4	ENSP00000209884.4	Q9Y2M5-1
KLHL20	ENST00000483154.5 link	n.440A>C		non_coding_transcript_exon_variant	Exon 3 of 3	1
KLHL20	ENST00000493170.1 link	n.176A>C		non_coding_transcript_exon_variant	Exon 3 of 3	1
KLHL20	ENST00000479505.5 link	n.358A>C		non_coding_transcript_exon_variant	Exon 4 of 4	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461480

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727016

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44694

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26082

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86220

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111758

Other (OTH)

AF:

0.00

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 06, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.47A>C (p.E16A) alteration is located in exon 3 (coding exon 2) of the KLHL20 gene. This alteration results from a A to C substitution at nucleotide position 47, causing the glutamic acid (E) at amino acid position 16 to be replaced by an alanine (A). 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

0.10

BayesDel_addAF

Benign

-0.088

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.10

Eigen

Benign

0.042

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.86

M_CAP

Benign

0.0085

MetaRNN

Benign

0.19

MetaSVM

Benign

-0.94

MutationAssessor

Benign

0.0

PhyloP100

6.3

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-0.040

REVEL

Benign

0.11

Sift

Benign

0.35

Sift4G

Benign

0.67

Polyphen

0.46

Vest4

0.33

MutPred

0.34

Gain of MoRF binding (P = 0.0234);

MVP

0.96

MPC

0.89

ClinPred

0.43

GERP RS

5.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.084

gMVP

0.39

Mutation Taster

=93/7

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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chr1-173733736-A-C

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