Novel De Novo DLL4 Missense and Highly Accurate Protein Structure Prediction in Adams–Oliver Type 6 Syndrome

Adams–Oliver syndrome (AOS) is a rare disease classically described with scalp vertex aplasia cutis and terminal transverse limb defects. This syndrome is frequently misdiagnosed by taking each feature of the disease separately. A novel de novo missense variant in DLL4 (c.998G>A, p.Cys333Tyr) was identified by Whole Exome Sequencing (WES), and structural analysis using AlphaFold and PremPS confirmed its pathogenicity by disrupting the NOTCH1 signaling pathway, highlighting the power of AI‐driven tools in variant interpretation.