Total submissions: 1
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Laboratory for Molecular Medicine, |
RCV000190633 | SCV000245672 | uncertain significance | Ehlers-Danlos syndrome due to tenascin-X deficiency | 2014-12-16 | criteria provided, single submitter | clinical testing | The p.Arg1666X variant in TNXB has not been previously reported in the literature but has been identified in 1/13218 South Asian chromosomes by the Exome Aggregation Consortium (ExAC) (http://exac.broadinstitute.org). This nonsense variant leads to a premature termination codon at position 1666, which is predicted to lead to a truncated or absent protein. Complete loss of TNXB function has been described in a few families with Ehlers-Danlos-like syndrome (Schalkwijk 2001, Merke 2013, Penisson-Besnier 2013) and a TNXB mouse knockout model indicates that complete loss of TNXB function results in abnormal collagen deposition (Mao 2002). In summary, while there is some suspicion for a pathogenic role of loss-of-function TNXB variants in Ehlers-Danlos-like syndrome, the clinical significance of the p.Arg1666X variant is uncertain. |