• 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 CTDP1 gene is associated with autosomal recessive congenital cataracts with facial dysmorphism and neuropathy (CCFDN) (Medgen UID: 346973).

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Order this gene as a single gene test.

CTDP1: Analysis is limited to the NM_004715.4:c.863+389C>T variant.

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Invitae tests that include this gene:

The CTDP1 gene encodes the carboxy-terminal domain phosphatase 1 protein. This protein regulates transcription by controlling the level of phosphorylation of the carboxy-terminal domain (CTD) of the POLR2A subunit of RNA polymerase II. The CTDP1 protein has also been implicated in recruitment of splicing machinery and chromatin remodeling (PMID: 9765293).

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 in the transcript listed below. In addition, analysis covers the select non-coding variants specifically defined in the table below. Any variants that fall outside these regions are not analyzed. Any specific limitations in the analysis of these genes are also listed in the table below.

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
CTDP1* NM_004715.4

*CTDP1: Analysis is limited to the NM_004715.4:c.863+389C>T variant.