11-112226489-C-T

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1PM2PP3_StrongPP5

The NM_000317.3(PTS):c.46C>T(p.Arg16Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000296 in 1,586,340 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

PTS
NM_000317.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:1

Conservation

PhyloP100: 3.19

Variant links:

Genes affected

PTS (HGNC:9689): (6-pyruvoyltetrahydropterin synthase) The enzyme encoded by this gene catalyzes the elimination of inorganic triphosphate from dihydroneopterin triphosphate, which is the second and irreversible step in the biosynthesis of tetrahydrobiopterin from GTP. Tetrahydrobiopterin, also known as BH(4), is an essential cofactor and regulator of various enzyme activities, including enzymes involved in serotonin biosynthesis and NO synthase activity. Mutations in this gene result in hyperphenylalaninemia. [provided by RefSeq, Oct 2008]

PTS links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

PM1

In a chain 6-pyruvoyl tetrahydrobiopterin synthase (size 144) in uniprot entity PTPS_HUMAN there are 10 pathogenic changes around while only 0 benign (100%) in NM_000317.3

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.989

PP5

Variant 11-112226489-C-T is Pathogenic according to our data. Variant chr11-112226489-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 477.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Likely_pathogenic=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTS	NM_000317.3 link	c.46C>T	p.Arg16Cys	missense_variant	Exon 1 of 6	ENST00000280362.8	NP_000308.1	Q03393

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTS	ENST00000280362.8 link	c.46C>T	p.Arg16Cys	missense_variant	Exon 1 of 6	1	NM_000317.3	ENSP00000280362.3		Q03393

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000198

AC:

AN:

202108

Hom.:

AF XY:

0.0000183

AC XY:

AN XY:

109100

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000333

Gnomad OTH exome

AF:

0.000193

GnomAD4 exome

AF:

0.0000314

AC:

AN:

1434196

Hom.:

Cov.:

AF XY:

0.0000281

AC XY:

AN XY:

710510

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000391

Gnomad4 OTH exome

AF:

0.0000168

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152144

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74316

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000307

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000855

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

6-Pyruvoyl-tetrahydrobiopterin synthase deficiency

Pathogenic:1Uncertain:1

Likely pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 18, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Nov 12, 2018	The PTS c.46C>T (p.Arg16Cys) missense variant has been reported in one study in which it is found in a compound heterozygous state with a frameshift variant in one individual with 6-pyruvoyltetrahydropterin synthase deficiency (ThÃ¶ny et al. 1994). Control data are unavailable for this variant, which is reported at a frequency of 0.000067 in the European (non-Finnish) population of the Genome Aggregation Database but this is based on one allele only and is presumed to be rare. Characterization of patient fibroblasts revealed PTS activity equivalent to one percent of wild type and heterologous expression of the p.Arg16Cys enzyme in E. coli showed similar expression levels but only seven percent enzyme activity of wild type (ThÃ¶ny et al. 1994). Expression of variant p.Arg16Cys and the mouse equivalent (mPTPSp.Arg15Cys) in COS-1 cells revealed significantly reduced PTS activity and in vivo radioactive labelling experiments showed that wild PTS was phosphorylated but the p.Arg16Cys was not (Oppliger et al. 1995; Korner et al. 2016). Mice that were homozygous or compound heterozygous for variant p.Arg16Cys had reduced PTPS activity (Korner et al. 2016). Based on the evidence, the p.Arg16Cys variant is classified as a variant of uncertain significance but suspicious for pathogenicity for 6-pyruvoyltetrahydropterin synthase deficiency. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Hyperphenylalaninemia, bh4-deficient, a, due to partial pts deficiency

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 01, 1994

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

BayesDel_addAF

Pathogenic

0.50

BayesDel_noAF

Pathogenic

0.48

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.98

D;.

Eigen

Pathogenic

0.71

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.81

T;T

M_CAP

Pathogenic

0.93

MetaRNN

Pathogenic

0.99

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.7

H;.

PrimateAI

Uncertain

0.70

PROVEAN

Pathogenic

-6.5

D;D

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;.

Vest4

0.69

MutPred

0.89

Loss of MoRF binding (P = 0.0067);Loss of MoRF binding (P = 0.0067);

MVP

1.0

MPC

0.91

ClinPred

1.0

GERP RS

4.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.7

Varity_R

0.91

gMVP

0.85

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over