Limb disordersGene: TGDS
Comment on list classification: Changing rating from red to green. More than 3 cases reported with variants in this gene and limb defects.
Created: 21 Nov 2019, 10:07 p.m. | Last Modified: 21 Nov 2019, 10:07 p.m.
Panel Version: 1.65
Associated with Catel-Manzke syndrome #616145 (AR) in OMIM.
PMID: 25480037 - Ehmke et al 2014 - Catel-Manzke syndrome is characterized by Pierre Robin sequence and a unique form of bilateral hyperphalangy causing a clinodactyly of the index finger. They identified homozygous and compound heterozygous mutations in TGDS in seven unrelated individuals with typical Catel-Manzke syndrome by exome sequencing. Six different TGDS mutations were detected: c.892A>G (p.Asn298Asp), c.270_271del (p.Lys91Asnfs(∗)22), c.298G>T (p.Ala100Ser), c.294T>G (p.Phe98Leu), c.269A>G (p.Glu90Gly), and c.700T>C (p.Tyr234His), all predicted to be disease causing. By using haplotype reconstruction they showed that the mutation c.298G>T is probably a founder mutation. 1 patient showed short toes, short humeri, short femora, 3 had clinodactyly V and 1 had brachymetacarpia and scoliosis.
PMID: 26366375 - Pferdehirt et al 2015 - describe a 12-month-old male with molecularly confirmed Catel-Manzke syndrome who presented with Pierre Robin sequence (but without cleft palate) and hyperphalangy. This patient is on the severe end of the phenotypic spectrum, presenting with respiratory complications and failure to thrive. He has a homozygous p.Ala100Ser pathogenic variant. Both parents are heterozygous for this variant.
PMID: 28422407 - Schoner et al 2017 - report on a fetus with severe heart defect, nuchal edema, talipes, Pierre-Robin sequence, and bilateral deviation and clinodactyly of the index and middle fingers. Postmortem radiographs showed hypoplasia and V-shaped displacement of the second and third proximal phalanges of both hands as well as hypoplasia of the first metatarsals and the phalangeal bones of the halluces. Two compound heterozygous mutations in TGDS were found: c.298G>T; p.(Ala100Ser) and c.895G>A; p.(Asp299Asn), located in the predicted substrate binding site of TGDS. Analyses of the parents’ blood DNA confirmed biparental inheritance.
Created: 21 Nov 2019, 4:51 p.m. | Last Modified: 21 Nov 2019, 10:05 p.m.
Panel Version: 1.64
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Catel-Manzke syndrome 616145
Gene: tgds has been classified as Green List (High Evidence).
gene: TGDS was added gene: TGDS was added to Limb disorders. Sources: Literature Mode of inheritance for gene: TGDS was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TGDS were set to 25480037 Phenotypes for gene: TGDS were set to Catel-Manzke syndrome 616145 Review for gene: TGDS was set to GREEN