Original ResearchPublished 3 March 2026A novel de novo ATP2B1 variant causes autosomal dominant intellectual developmental disorder 66 by disrupting calcium homeostasis via impaired membrane traffickingHuanhuan Zang · Xiaoyun Yang · Yucai Liu · Caiyun Ma · Dawei YangExperimental Biology and Medicinedoi 10.3389/ebm.2026.10834