11-112226452-G-C

Variant names:

• chr11-112226452-G-C
• rs1460470110
• NM_000317.3:c.9G>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000317.3(PTS):​c.9G>C​(p.Thr3Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000007 in 1,428,092 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T3T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: PTS NM_000317.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.346
• 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 -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.73).
• BP7: Synonymous conserved (PhyloP=0.346 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTS	NM_000317.3	c.9G>C	p.Thr3Thr	synonymous_variant	Exon 1 of 6	ENST00000280362.8	NP_000308.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTS	ENST00000280362.8	c.9G>C	p.Thr3Thr	synonymous_variant	Exon 1 of 6	1	NM_000317.3	ENSP00000280362.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.00e-7 AC: 1 AN: 1428092 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 706952

African (AFR) AF: 0.00 AC: 0 AN: 33264

American (AMR) AF: 0.00 AC: 0 AN: 37442

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25364

East Asian (EAS) AF: 0.00 AC: 0 AN: 38602

South Asian (SAS) AF: 0.0000123 AC: 1 AN: 81392

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49736

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5614

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1097338

Other (OTH) AF: 0.00 AC: 0 AN: 59340

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.73
CADD	Benign	5.3
DANN	Benign	0.75
PhyloP100		0.35
PromoterAI		-0.029	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6

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: rs1460470110; hg19: chr11-112097175;