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  • 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
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TNNI3

Alias

CMD1FF; CMD2A; CMH7; RCM1; TNNC1; cTnI

Associated disorders

The TNNI3 gene is associated with autosomal dominant hypertrophic cardiomyopathy (HCM) (MedGen UID: 183649), dilated cardiomyopathy (DCM) (MedGen UID: 2880), and restrictive cardiomyopathy (RCM) (MedGen UID: 396236).

Pathogenic TNNI3 variants are associated with 2% of clinical cases of HCM and <1% of DCM cases.

The TNNI3 gene encodes the cardiac muscle protein troponin I, cardiac muscle. Troponin I is a part of the sarcomere complex, which is present in both cardiac and skeletal muscle cells. The primary role of the sarcomere complex is muscle contraction. Pathogenic variants in genes that encode sarcomere proteins are a common cause of inherited cardiomyopathies.

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
TNNI3 NM_000363.4