Associated disorders

The GAMT gene is associated with autosomal recessive cerebral creatine deficiency syndrome (MedGen UID: 154356).

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Invitae tests that include this gene:

Pathogenic variants in the GATM gene are associated with 100% of clinical cases of guanidinoacetate methyltransferase deficiency, an unknown fraction of cerebral creatine deficiency.

Creatine is an essential cofactor in cellular energy production and utilization. Creatine is taken up from food as well as synthesized in the body. The GAMT gene encodes an important enzyme in cellular creatine production.

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
GAMT NM_000156.5