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Hereditary Cancer in Clinical Practice

Open Access

The pathological significance of selected MLH1 missense mutations based on the theoretical in silico predictions.

  • Mariola Dubanowicz1
Hereditary Cancer in Clinical Practice201513(Suppl 1):A9

Published: 9 September 2015

Germline mutations in the human DNA mismatch repair (MMR) genes MSH2 and MLH1 are associated with the inherited cancer disorder Lynch syndrome (LS). Up to 30% of MLH1 variants found are missense mutations. The functional consequences in regard to pathogenicity of many of these variants are unclear. Missense mutations affect protein structure or function, but may also cause aberrant splicing. In this study, in silico prediction tools (SIFT, PolyPhen-2 and ESEfinder 3.0), literature and an online MMR mutation database review were used to evaluate the clinical significance of 26 MLH1 missense mutations identified in patients from Polish families, suspected of Lynch syndrome. Six MLH1 VUS were classified as pathogenic, nine MLH1 missense mutations are classified as neutral. 11 variants require additional research. The results show that in silico prediction tools can be utilized in an appropriate and efficient manner to determine the pathogenicity of MMR gene variations.

Authors’ Affiliations

Pomeranian Medical University, Faculty of Medical Biotechnology, Szczecin, Poland


© Dubanowicz 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.