TY - JOUR KW - Artifacts KW - Automation KW - Consanguinity KW - Exons KW - Gain of Function Mutation KW - Gene Frequency KW - Gene Knockdown Techniques KW - Genes, Essential KW - Heterozygote KW - Homozygote KW - Humans KW - Huntingtin Protein KW - Leucine-Rich Repeat Serine-Threonine Protein Kinase-2 KW - Loss of Function Mutation KW - Molecular Targeted Therapy KW - Neurodegenerative Diseases KW - Prion Proteins KW - Reproducibility of Results KW - Sample Size KW - tau Proteins AU - Eric Vallabh Minikel AU - Konrad J. Karczewski AU - Hilary C. Martin AU - Beryl B. Cummings AU - Nicola Whiffin AU - Daniel Rhodes AU - Jessica Alföldi AU - Richard C. Trembath AU - David A. van Heel AU - Mark J. Daly AU - Genome Aggregation Database Production Team AU - Genome Aggregation Database Consortium AU - Stuart L. Schreiber AU - Daniel G. MacArthur AB - Naturally occurring human genetic variants that are predicted to inactivate protein-coding genes provide an in vivo model of human gene inactivation that complements knockout studies in cells and model organisms. Here we report three key findings regarding the assessment of candidate drug targets using human loss-of-function variants. First, even essential genes, in which loss-of-function variants are not tolerated, can be highly successful as targets of inhibitory drugs. Second, in most genes, loss-of-function variants are sufficiently rare that genotype-based ascertainment of homozygous or compound heterozygous 'knockout' humans will await sample sizes that are approximately 1,000 times those presently available, unless recruitment focuses on consanguineous individuals. Third, automated variant annotation and filtering are powerful, but manual curation remains crucial for removing artefacts, and is a prerequisite for recall-by-genotype efforts. Our results provide a roadmap for human knockout studies and should guide the interpretation of loss-of-function variants in drug development. BT - Nature DA - 2020-05 DO - 10.1038/s41586-020-2267-z IS - 7809 LA - eng N2 - Naturally occurring human genetic variants that are predicted to inactivate protein-coding genes provide an in vivo model of human gene inactivation that complements knockout studies in cells and model organisms. Here we report three key findings regarding the assessment of candidate drug targets using human loss-of-function variants. First, even essential genes, in which loss-of-function variants are not tolerated, can be highly successful as targets of inhibitory drugs. Second, in most genes, loss-of-function variants are sufficiently rare that genotype-based ascertainment of homozygous or compound heterozygous 'knockout' humans will await sample sizes that are approximately 1,000 times those presently available, unless recruitment focuses on consanguineous individuals. Third, automated variant annotation and filtering are powerful, but manual curation remains crucial for removing artefacts, and is a prerequisite for recall-by-genotype efforts. Our results provide a roadmap for human knockout studies and should guide the interpretation of loss-of-function variants in drug development. PY - 2020 SP - 459 EP - 464 T2 - Nature TI - Evaluating drug targets through human loss-of-function genetic variation VL - 581 SN - 1476-4687 ER -