Genetic Variant NM_001159390.2:c.191C>A (chr1-228146041-C-A) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001159390.2(GUK1):c.191C>A(p.Pro64Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,528 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. P64L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

GUK1
NM_001159390.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.82

Publications

0 publications found

Variant links:

Genes affected

GUK1 (HGNC:4693): (guanylate kinase 1) The protein encoded by this gene is an enzyme that catalyzes the transfer of a phosphate group from ATP to guanosine monophosphate (GMP) to form guanosine diphosphate (GDP). The encoded protein is thought to be a good target for cancer chemotherapy. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2011]

GUK1 Gene-Disease associations (from GenCC):

mitochondrial disease
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

GUK1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.944

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001159390.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GUK1	NM_001159390.2	MANE Select	c.191C>A	p.Pro64Gln	missense	Exon 3 of 8	NP_001152862.1	Q16774-2
GUK1	NM_001242840.3		c.191C>A	p.Pro64Gln	missense	Exon 3 of 7	NP_001229769.1	Q16774-3
GUK1	NM_000858.7		c.128C>A	p.Pro43Gln	missense	Exon 4 of 9	NP_000849.1	Q6IBG8

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GUK1	ENST00000453943.6	TSL:1 MANE Select	c.191C>A	p.Pro64Gln	missense	Exon 3 of 8	ENSP00000401832.2	B1ANH0
GUK1	ENST00000312726.9	TSL:1	n.*185C>A		non_coding_transcript_exon	Exon 4 of 9	ENSP00000317659.5	A0A9L9PY36
GUK1	ENST00000366716.1	TSL:1	n.187C>A		non_coding_transcript_exon	Exon 2 of 7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459528

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726230

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33430

American (AMR)

AF:

0.00

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26098

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86224

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53270

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

9.01e-7

AC:

AN:

1110080

Other (OTH)

AF:

0.00

AC:

AN:

60298

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.275

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

Uncertain

0.47

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Uncertain

-0.030

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.33

Eigen

Pathogenic

0.75

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

M_CAP

Benign

0.070

MetaRNN

Pathogenic

0.94

MetaSVM

Benign

-0.71

MutationAssessor

Uncertain

2.6

PhyloP100

7.8

PrimateAI

Uncertain

0.56

PROVEAN

Pathogenic

-7.2

REVEL

Uncertain

0.41

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0020

Polyphen

0.96

Vest4

0.82

MutPred

0.75

Loss of glycosylation at T40 (P = 0.0593)

MVP

0.73

MPC

0.96

ClinPred

1.0

GERP RS

5.3

RBP_binding_hub_radar

1.0

RBP_regulation_power_radar

2.3

Varity_R

0.62

gMVP

0.82

Mutation Taster

=10/90

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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