Associated disorders

The STT3B gene currently has no well-established disease association; however, there is preliminary evidence supporting a correlation with autosomal recessive STT3B-congenital disorder of glycosylation (CDG-Ix).

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The percentage of clinical cases of congenital disorders of glycosylation attributed to pathogenic variants in STT3B is unknown.

The STT3B gene encodes one isoform of the catalytic subunit of the oligosaccharyltransferase (OST) complex. The OST complex is responsible for transferring the N-linked glycans to proteins in the endoplasmic reticulum during glycosylation.

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
STT3B NM_178862.2