While many quantitative structure activity relationship analyses involve the interactions of a family of molecules with an enzyme or receptor binding site, QSAR can also be used to study the interactions between the structural domains of proteins. Protein-protein interactions can be quantitatively analyzed for structural variations resulted from site-directed mutagenesis.[53]
It is part of the machine learning method to reduce the risk for a SAR paradox, especially taking into account that only a finite amount of data is available (see also MVUE). In general, all QSAR problems can be divided into coding[54] and learning.[55]
Applications
(Q)SAR models have been used for risk management. QSARS are suggested by regulatory authorities; in the European Union, QSARs are suggested by the REACH regulation, where "REACH" abbreviates "Registration, Evaluation, Authorisation and Restriction of Chemicals". Regulatory application of QSAR methods includes in silico toxicological assessment of genotoxic impurities.[56] Commonly used QSAR assessment software such as DEREK or CASE Ultra (MultiCASE) is used to genotoxicity of impurity according to ICH M7.[57]
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↑Jiang, Dejun; Wu, Zhenxing; Hsieh, Chang-Yu; Chen, Guangyong; Liao, Ben; Wang, Zhe; Shen, Chao; Cao, Dongsheng; Wu, Jian; Hou, Tingjun (17 February 2021). "Could graph neural networks learn better molecular representation for drug discovery? A comparison study of descriptor-based and graph-based models". Journal of Cheminformatics. 13 (1): 12. doi:10.1186/s13321-020-00479-8. PMC7888189. PMID33597034.
↑van Tilborg, Derek; Alenicheva, Alisa; Grisoni, Francesca (12 December 2022). "Exposing the Limitations of Molecular Machine Learning with Activity Cliffs". Journal of Chemical Information and Modeling. 62 (23): 5938–5951. doi:10.1021/acs.jcim.2c01073. PMC9749029. PMID36456532.
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↑ Fraczkiewicz, R (2013). "In Silico Prediction of Ionization". In Reedijk, J (ed.). Reference Module in Chemistry, Molecular Sciences and Chemical Engineering . Reference Module in Chemistry, Molecular Sciences and Chemical Engineering [Online] . Vol. 5. Amsterdam, the Netherlands: Elsevier. doi : 10.1016/B978-0-12-409547-2.02610-X . ISBN978-0-12-409547-2。
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