11-112233522-T-G

Variant names:

• chr11-112233522-T-G
• rs59731976
• NM_000317.3:c.405T>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_000317.3(PTS):​c.405T>G​(p.Thr135Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T135T) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTS NM_000317.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.408
• 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: G2P, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).
• BP6: Variant 11-112233522-T-G is Benign according to our data. Variant chr11-112233522-T-G is described in ClinVar as Likely_benign. ClinVar VariationId is 1096782.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.408 with no splicing effect.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTS	NM_000317.3	MANE Select	c.405T>G	p.Thr135Thr	synonymous	Exon 6 of 6	NP_000308.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTS	ENST00000280362.8	TSL:1 MANE Select	c.405T>G	p.Thr135Thr	synonymous	Exon 6 of 6	ENSP00000280362.3
	PTS	ENST00000531673.5	TSL:1	n.*123+289T>G		intron	N/A	ENSP00000433469.1
	PTS	ENST00000524931.1	TSL:3	c.201T>G	p.Thr67Thr	synonymous	Exon 6 of 6	ENSP00000434688.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

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
BayesDel_noAF	Benign	-0.47
CADD	Benign	7.8
DANN	Benign	0.80
PhyloP100		-0.41

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

Other links and lift over

dbSNP: rs59731976; hg19: chr11-112104245;