Skip to main content

Recurrent MBTPS2 variant c.970+5G>A in IFAP syndrome: a mutational hotspot.

Human genome variation

Authors: Sheetal Kumar, Sohail Ahmed, Pietro Incardona, Nicole Cesarato, Yue Zhang, Monica Ines Natale, Muhammad Javed Khan, Laura Valinotto, Kifayat Ullah, Wasim Ahmad, Ines Irurzun, Peter M Krawitz, Bo Liang, Regina C Betz

Ichthyosis follicularis, alopecia and photophobia (IFAP) syndrome type I is a rare, X-linked disorder resulting from pathogenic variants in MBTPS2. Here we report a Pakistani IFAP pedigree of three affected individuals harboring the recurrent MBTPS2 splice-site variant c.970+5G>A that was reported previously in Chinese and Argentinian families. Haplotype analyses across these three families excluded a founder effect, establishing c.970+5G>A as a recurrent mutational hotspot. In addition, phenotypic severity varied across the families, suggesting additional modifiers.

© 2026. The Author(s).

PMID: 41974659

Participating cluster members