Of the six cases/families now reported with EEC syndrome and Arg227GlnTP63 mutation, four have manifested this distinct urological abnormality, indicative of a genotype-phenotype correlation.
The present study revealed that the R243Q mutation in the TP63 gene produced a novel phenotype named SHFM4, thereby demonstrating the mutational overlap between ectrodactyly‑ectodermal dysplasia‑cleft syndrome and SHFM4.
Mutations in the p63 gene are found in a number of human syndromes, including ectrodactyly-ectodermal dysplasia-cleft lip/palate (EEC) syndrome, limb-mammary syndrome (LMS), Hay-Wells syndrome and in non-syndromic split-hand/split-foot malformation (SHFM).
There was no relationship of limbal stem cell failure with the severity of EEC syndrome, as classified by the EEC score, or the underlying molecular defect in p63.
Here, we report a three-generation family with ADULT syndrome due to an R243W mutation in TP63, a mutation that has previously been described in one patient with ADULT syndrome and eight unrelated patients with EEC syndrome.
This report expands the knowledge of genotype-phenotype data on the p63 gene and suggests there may be a considerable overlap between the EEC syndrome and the ADULT syndrome.
In this paper we describe a 17-year-old girl affected by ectrodactyly-ectodermal dysplasia-clefting syndrome with a de novo p63 mutation that predicts a heterozygous missense substitution (arginine to tryptophan substitution caused by a cytosine to thymine transition) at the amino acid 304 (R304W) of the p63 DNA-binding domain.
Here, we characterize the transcriptional activity and protein stability of ΔNp63 mutants (that is, mutants of a p63 isoform that lacks the N-terminal transactivation domain) that are found in ectrodactyly-ectodermal dysplasia-cleft syndrome (EEC), ankyloblepharon-ectodermal dysplasia-clefting syndrome (AEC) and nonsyndromic split-hand/split-foot malformation (SHFM).