Nancy Leticia Hernandez-Martinez

Dr. Nancy Leticia Hernandez-Martinez


Research Focus & Metrics

Academic Career Length

1Year (2026-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 February 2026 in Genes
Verified
Journal Article
Open access
PDF file
LFLiliana Fernández-Hernández
Liliana Fernández-Hernández
SESergio Enriquez-Flores
Sergio Enriquez-Flores
NHNancy Leticia Hernandez-Martinez
Nancy Leticia Hernandez-Martinez
MAMelania Abreu-González
Melania Abreu-González
ELEsther Lieberman
Esther Lieberman
MRMiriam E Reyna-Fabian
Miriam E Reyna-Fabian
Background/Objectives: ASXL1 is a chromatin-associated gene implicated in both hematologic malignancies and neurodevelopmental disorders, including Bohring–Opitz syndrome (BOS). Although many ASXL1 variants are well classified, a substantial proportion remain variants of uncertain significance (VUS), complicating molecular diagnosis and genetic counseling. The objective of this study was to evaluate whether structural context can inform the interpretation of selected ASXL1 missense variants in a clinical setting. Methods: We describe a 17-year-old female with clinical features consistent with BOS carrying the heterozygous ASXL1 variant p.Q1448R, currently classified as benign under ACMG/AMP guidelines. Three-dimensional in silico structural modeling was performed using AlphaFold3 and available crystallographic data. Three additional ASXL1 missense variants classified as VUS in ClinVar (p.R265H, p.T297M, and p.Y358C) were also analyzed. Evolutionary conservation, domain localization, and residue-level interactions were assessed. Results: Structural modeling indicated that the p.Q1448R substitution alters polar interactions and introduces a steric constraint near a conserved PHD-type zinc finger domain. Variants p.R265H and p.T297M affected stabilizing interactions within the DEUBAD, which is involved in BAP1 activation, while p.Y358C altered a polar microenvironment adjacent to a chromatin-interacting region. All analyzed variants, except p.T297M, localized to evolutionarily conserved regions. Conclusions: This study demonstrates that in silico structural analysis can provide complementary, domain-level insights for the interpretation of ASXL1 missense variants that remain classified as benign, likely benign or VUS under current frameworks. Such approaches may assist in prioritizing variants for further functional evaluation and refining molecular interpretation when experimental data are limited.