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Features include always present findings: Penoscrotal hypospadias.
MAMLD1 encodes mastermind like domain containing 1 (774 aa). Transactivates the HES3 promoter independently of NOTCH proteins. HES3 is a non-canonical NOTCH target gene which lacks binding sites for RBPJ Highest expression in Testis (36.4 TPM) and Ovary (33.9 TPM).
Hypospadias 2, X-linked is associated with mutations in the MAMLD1 gene on chromosome X.
The MAMLD1 protein participates in Signaling by NOTCH1 and NOTCH3 Intracellular Domain Regulates Transcription pathways.
MAMLD1 is classified as a druggable target with score 0.0.
Genetic testing for MAMLD1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 1 always present feature.
No clinical trials have been registered for hypospadias 2, X-linked.
4 publications have been identified in PubMed for hypospadias 2, X-linked. Research spans Case Report / Case Series (100%).
Wu Q (2026). [PMID: 41842826](https://pubmed.ncbi.nlm.nih.gov/41842826/). *J Craniofac Surg*. [Case Report / Case Series]
Gan L (2025). [PMID: 39779334](https://pubmed.ncbi.nlm.nih.gov/39779334/). *Zhonghua Yi Xue Yi Chuan Xue Za Zhi*. [Case Report / Case Series]
Yan Y (2025). [PMID: 40350402](https://pubmed.ncbi.nlm.nih.gov/40350402/). *Zhonghua Yi Xue Yi Chuan Xue Za Zhi*. [Case Report / Case Series]
Margiotti K (2024). [PMID: 38962685](https://pubmed.ncbi.nlm.nih.gov/38962685/). *Case Rep Pediatr*. [Case Report / Case Series]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 3:03 PM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center