rs1555198513

Variant names:

• chr11-112233546-A-C
• rs1555198513
• NM_000317.3:c.429A>C
• PTS p.Lys143Asn

Your query was ambiguous. Multiple possible variants found:

• chr11-112233546-A-C
• chr11-112233546-A-G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP2

The NM_000317.3(PTS):​c.429A>C​(p.Lys143Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTS NM_000317.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.254
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• BH4-deficient hyperphenylalaninemia A

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet, ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_000317.3
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 32 curated pathogenic missense variants (we use a threshold of 10). The gene has 4 curated benign missense variants. Gene score misZ: 0.12554 (below the threshold of 3.09). Trascript score misZ: -0.18308 (below the threshold of 3.09). GenCC associations: The gene is linked to BH4-deficient hyperphenylalaninemia A.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000317.3. 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
	PTS	NM_000317.3	MANE Select	c.429A>C	p.Lys143Asn	missense	Exon 6 of 6	NP_000308.1	Q03393

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTS	ENST00000280362.8	TSL:1 MANE Select	c.429A>C	p.Lys143Asn	missense	Exon 6 of 6	ENSP00000280362.3	Q03393
	PTS	ENST00000531673.5	TSL:1	n.*123+313A>C		intron	N/A	ENSP00000433469.1	E9PKY8
	PTS	ENST00000889305.1		c.426A>C	p.Lys142Asn	missense	Exon 6 of 6	ENSP00000559364.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	6-Pyruvoyl-tetrahydrobiopterin synthase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	D
Eigen	Benign	-0.086
Eigen_PC	Benign	-0.079
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Uncertain	0.94	D
M_CAP	Pathogenic	0.60	D
MetaRNN	Uncertain	0.54	D
MetaSVM	Pathogenic	0.90	D
MutationAssessor	Benign	1.8	L
PhyloP100		0.25
PrimateAI	Uncertain	0.73	T
PROVEAN	Uncertain	-2.4	N
REVEL	Uncertain	0.60
Sift	Uncertain	0.010	D
Sift4G	Uncertain	0.019	D
Varity_R		0.70
gMVP		0.78
Mutation Taster		=39/61	disease causing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1555198513;

hg19: chr11-112104269;