Associated disorders

The RIT1 gene is associated with autosomal dominant Noonan syndrome (MedGen UID: 815563).

An estimated 9% of Noonan syndrome is caused by pathogenic variants in RIT1.

The RIT1 gene encodes a RAS-related GTPase involved in the p38 MAPK-dependent signaling pathway. RIT1 acts as an on-off switch in either an active GTP-bound state or an inactive GDP-bound state in response to extracellular signals to regulate cell growth, maturation, and survival. RIT1 responds to nerve-growth factor for neural development and differentiation.

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
RIT1 NM_006912.5