Genetic Variant NM_006488.3:c.737C>G (chr2-27099503-C-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_006488.3(KHK):c.737C>G(p.Pro246Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,870 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. P246L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

KHK
NM_006488.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.60

Publications

0 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 links:

CGREF1 (HGNC:16962): (cell growth regulator with EF-hand domain 1) Predicted to enable calcium ion binding activity. Predicted to be involved in negative regulation of cell population proliferation. Predicted to be located in extracellular region. [provided by Alliance of Genome Resources, Apr 2022]

CGREF1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.838

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

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KHK	NM_006488.3	MANE Select	c.737C>G	p.Pro246Arg	missense	Exon 7 of 8	NP_006479.1	P50053-1
KHK	NM_000221.3		c.737C>G	p.Pro246Arg	missense	Exon 7 of 8	NP_000212.1	P50053-2
CGREF1	NM_001166240.2		c.*281G>C		3_prime_UTR	Exon 6 of 6	NP_001159712.1	Q99674-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KHK	ENST00000260598.10	TSL:2 MANE Select	c.737C>G	p.Pro246Arg	missense	Exon 7 of 8	ENSP00000260598.5	P50053-1
KHK	ENST00000260599.11	TSL:1	c.737C>G	p.Pro246Arg	missense	Exon 7 of 8	ENSP00000260599.6	P50053-2
KHK	ENST00000464371.1	TSL:1	n.663C>G		non_coding_transcript_exon	Exon 5 of 6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461870

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

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:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112004

Other (OTH)

AF:

0.00

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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

Pathogenic

0.19

BayesDel_noAF

Uncertain

0.040

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.68

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.056

MetaRNN

Pathogenic

0.84

MetaSVM

Uncertain

-0.23

MutationAssessor

Uncertain

2.7

PhyloP100

7.6

PrimateAI

Benign

0.46

PROVEAN

Pathogenic

-7.7

REVEL

Uncertain

0.43

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.019

Polyphen

0.98

Vest4

0.71

MutPred

0.61

Loss of sheet (P = 0.0817)

MVP

0.81

MPC

0.72

ClinPred

1.0

GERP RS

5.3

Varity_R

0.88

gMVP

0.61

Mutation Taster

=34/66

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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over