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To provide the initial confirmation of the c.1772C&gt;T (p.Ser591Phe) mutation in the transforming growth factor--induced ( TGFBI)  gene as being associated with variant lattice corneal dystrophy (LCD). Ophthalmologic examination of the proband was performed with slit lamp biomicroscopy. Saliva was collected as a source of DNA for screening all 17 exons of  TGFBI , after which three family members were selectively screened for variants in exon 13. Rosetta-based structure prediction was used to calculate changes in TGFBI protein (TGFBIp) stability secondary to the c.1772C&gt;T (p.Ser591Phe) missense mutation. Slit lamp examination of the 38-year-old proband revealed a clear cornea right eye and unilateral, discrete, and branching lattice lines in the anterior and mid-stroma of the central cornea left eye. Screening of  TGFBI  in the proband revealed a heterozygous missense mutation in exon 13 (c.1772C&gt;T (p.Ser591Phe)) that was also identified in her affected mother but not in her brother or maternal grandmother. Calculated energy change in Rosetta (ΔΔG) for the TGFBIp variant p.Ser591Phe was 23.5, indicating a thermodynamic destabilization resulting from energetic frustration. The p.Ser591Phe mutation in  TGFBI  is associated with an unilateral variant of LCD. Rosetta-predicted stability changes indicate that the p.Ser591Phe variant is destabilizing, which is consistent with other observations for LCD-causing mutations.

Confirmation of association of TGFBI p.Ser591Phe mutation with variant lattice corneal dystrophy