PT - JOURNAL ARTICLE AU - Jinmyung Choi AU - Parisa Shooshtari AU - Kaitlin E Samocha AU - Mark J Daly AU - Chris Cotsapas TI - Network analysis of genome-wide selective constraint reveals a gene network active in early fetal brain intolerant of mutation AID - 10.1101/017277 DP - 2015 Jan 01 TA - bioRxiv PG - 017277 4099 - http://biorxiv.org/content/early/2015/03/29/017277.short 4100 - http://biorxiv.org/content/early/2015/03/29/017277.full AB - Using robust, integrated analysis of multiple genomic datasets, we show that genes depleted for non-synonymous de novo mutations form a subnetwork of 72 members under strong selective constraint. We further show this subnetwork is preferentially expressed in the early development of the human hippocampus and is enriched for genes mutated in neurological, but not other, Mendelian disorders. We thus conclude that carefully orchestrated developmental processes are under strong constraint in early brain development, and perturbations caused by mutation have adverse outcomes subject to strong purifying selection. Our findings demonstrate that selective forces can act on groups of genes involved in the same process, supporting the notion that adaptation can act coordinately on multiple genes. Our approach provides a statistically robust, interpretable way to identify the tissues and developmental times where groups of disease genes are active. Our findings highlight the importance of considering the interactions between genes when analyzing genome-wide sequence data.