6ecp
The human methylenetetrahydrofolate dehydrogenase/cyclohydrolase (FolD) complexed with NADP and inhibitor LY249543
Structural highlights
DiseaseC1TC_HUMAN Defects in MTHFD1 may be a cause of susceptibility to folate-sensitive neural tube defects (FS-NTD) [MIM:601634. The most common NTDs are open spina bifida (myelomeningocele) and anencephaly. Genetic defects in MTHFD1 may affect the risk of spina bifida via the maternal rather than the embryonic genotype.[1] [2] [3] Genetic variation in MTHFD1 could be associated with susceptibility to colorectal cancer (CRC) [MIM:114500. FunctionPublication Abstract from PubMedThe enzymes involved in folate metabolism are key drug targets for cell-growth modulation, and accurate crystallographic structures provide templates to be exploited for structure-based ligand design. In this context, three ternary complex structures of human methylenetetrahydrofolate dehydrogenase/cyclohydrolase have been published [Schmidt et al. (2000), Biochemistry, 39, 6325-6335] and potentially represent starting points for the development of new antifolate inhibitors. However, an inspection of the models and the deposited data revealed deficiencies and raised questions about the validity of the structures. A number of inconsistencies relating to the publication were also identified. Additional refinement was carried out with the deposited data, seeking to improve the models and to then validate the complex structures or correct the record. In one case, the inclusion of the inhibitor in the structure was supported and alterations to the model allowed details of enzyme-ligand interactions to be described that had not previously been discussed. For one weak inhibitor, the data suggested that the ligand may adopt two poses in the binding site, both with few interactions with the enzyme. In the third case, that of a potent inhibitor, inconsistencies were noted in the assignment of the chemical structure and there was no evidence to support the inclusion of the ligand in the active site. An assessment of three human methylenetetrahydrofolate dehydrogenase/cyclohydrolase-ligand complexes following further refinement.,Bueno R, Dawson A, Hunter WN Acta Crystallogr F Struct Biol Commun. 2019 Mar 1;75(Pt 3):148-152. doi:, 10.1107/S2053230X18018083. Epub 2019 Feb 20. PMID:30839287[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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