Genetic Variant KHK:p.Val49Phe (chr2-27092384-G-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_006488.3(KHK):c.145G>T(p.Val49Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,182 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. V49I) has been classified as Benign.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

KHK
NM_006488.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.25

Publications

44 publications found

Variant links:

Genes affected

KHK (HGNC:6315): (ketohexokinase) This gene encodes ketohexokinase that catalyzes conversion of fructose to fructose-1-phosphate. The product of this gene is the first enzyme with a specialized pathway that catabolizes dietary fructose. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

KHK Gene-Disease associations (from GenCC):

essential fructosuria
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

KHK links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.853

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006488.3. 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
	KHK	NM_006488.3	MANE Select	c.145G>T	p.Val49Phe	missense	Exon 2 of 8	NP_006479.1	P50053-1
	KHK	NM_000221.3		c.145G>T	p.Val49Phe	missense	Exon 2 of 8	NP_000212.1	P50053-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KHK	ENST00000260598.10	TSL:2 MANE Select	c.145G>T	p.Val49Phe	missense	Exon 2 of 8	ENSP00000260598.5	P50053-1
KHK	ENST00000260599.11	TSL:1	c.145G>T	p.Val49Phe	missense	Exon 2 of 8	ENSP00000260599.6	P50053-2
KHK	ENST00000908283.1		c.145G>T	p.Val49Phe	missense	Exon 2 of 9	ENSP00000578342.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250738

AF XY:

0.00000737

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:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461182

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726934

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52780

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111962

Other (OTH)

AF:

0.0000166

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Uncertain

0.070

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.71

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.84

LIST_S2

Uncertain

0.94

M_CAP

Uncertain

0.23

MetaRNN

Pathogenic

0.85

MetaSVM

Uncertain

0.41

MutationAssessor

Pathogenic

3.4

PhyloP100

4.2

PrimateAI

Uncertain

0.66

PROVEAN

Pathogenic

-4.5

REVEL

Pathogenic

0.65

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.83

MutPred

0.62

Loss of MoRF binding (P = 0.243)

MVP

0.90

MPC

0.85

ClinPred

0.99

GERP RS

2.7

Varity_R

0.95

gMVP

0.79

Mutation Taster

=45/55

disease causing

(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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over