• 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 RASA1 gene is associated with autosomal dominant capillary malformation-arteriovenous malformations (CM-AVM)(MedGen UID: 334007) and Parkes Weber syndrome (MedGen UID: 442305).

An estimated 70% of CM-AVM is caused by pathogenic variants identified in the RASA1 gene.

The RASA1 gene encodes p120-RasGAP protein that is part of GAP1 family of GTPase-activiating proteins. RASA1 acts as a negative regulator of the RAS/MAPK signalling pathway to control cell growth and division. RASA1 protein is crucial for normal development of the vascular system.

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
RASA1 NM_002890.2