CMTX; CMTX1; Cx32
The GJB1 gene (also known as connexin 32, or Cx32) is associated with X-linked Charcot-Marie-Tooth disease type 1X (CMT1X) (MedGen UID: 98290).
Order this gene as a single gene test.
Invitae tests that include this gene:
An estimated 90% of X-linked CMT and 10%-20% of all CMT cases are caused by pathogenic variants in GJB1.
The gene GJB1 encodes the gap junction protein connexin 32, which is expressed in the liver, pancreas, and kidney and in the nervous system. In both the peripheral and central nervous system, this protein forms channels through the myelin sheath, an insulating structure essential for proper function of neurons.
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|