• Turnaround time:
    10–21 calendar days (14 days on average)
  • Preferred specimen:
    3mL whole blood in a purple-top tube
  • Alternate specimens:
    DNA or saliva/assisted saliva
  • Sample requirements
  • Request a sample kit




Associated disorders

The PTS gene is associated with autosomal recessive tetrahydrobiopterin-deficient hyperphenylalaninemia due to 6-pyruvoyltetrahydropterin synthase deficiency (MedGen UID: 209234).

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Invitae tests that include this gene:

An estimated 1-3% of hyperphenylalaninemia cases are due to defects in tetrahydrobiopterin metabolism. Of the 1-3% of cases, approximately 60% of them are due to 6-pyruvoyltetrahydropterin synthase (PTS) deficiency (PMID: 19234759).

The PTS gene encodes the enzyme, 6-pyruvoyltetrahydropterin synthase, which is involved in the second of three steps in the de novo biosynthesis of tetrahydrobiopterin (BH4). In the second step, 6-pyruvoyltetrahydropterin synthase removes triphospate from 7,8-dihydroneopterin triphosphate to create 6-pyruvoyl tetrahydropterin in a two step reaction (PMID: 19234759).

Assay and technical information

Invitae is a College of American Pathologists (CAP)-accredited and Clinical Laboratory Improvement Amendments (CLIA)-certified clinical diagnostic laboratory performing full-gene sequencing and deletion/duplication analysis using next-generation sequencing technology (NGS).

Our sequence analysis covers clinically important regions of each gene, including coding exons, +/- 10 base pairs of adjacent intronic sequence, and select noncoding variants. Our assay provides a Q30 quality-adjusted mean coverage depth of 350x (50x minimum, or supplemented with additional analysis). Variants classified as pathogenic or likely pathogenic are confirmed with orthogonal methods, except individual variants that have high quality scores and previously validated in at least ten unrelated samples.

Our analysis detects most intragenic deletions and duplications at single exon resolution. However, in rare situations, single-exon copy number events may not be analyzed due to inherent sequence properties or isolated reduction in data quality. If you are requesting the detection of a specific single-exon copy number variation, please contact Client Services before placing your order.

Gene Transcript reference Sequencing analysis Deletion/Duplication analysis
PTS NM_000317.2