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Elucidating common structural features of human pathogenic variations using
large-scale atomic-resolution protein networks
#MMPMID24599843
Das J
; Lee HR
; Sagar A
; Fragoza R
; Liang J
; Wei X
; Wang X
; Mort M
; Stenson PD
; Cooper DN
; Yu H
Hum Mutat
2014[May]; 35
(5
): 585-93
PMID24599843
show ga
With the rapid growth of structural genomics, numerous protein crystal structures
have become available. However, the parallel increase in knowledge of the
functional principles underlying biological processes, and more specifically the
underlying molecular mechanisms of disease, has been less dramatic. This
notwithstanding, the study of complex cellular networks has made possible the
inference of protein functions on a large scale. Here, we combine the scale of
network systems biology with the resolution of traditional structural biology to
generate a large-scale atomic-resolution interactome-network comprising 3,398
interactions between 2,890 proteins with a well-defined interaction interface and
interface residues for each interaction. Within the framework of this
atomic-resolution network, we have explored the structural principles underlying
variations causing human-inherited disease. We find that in-frame pathogenic
variations are enriched at both the interface and in the interacting domain,
suggesting that variations not only at interface "hot-spots," but in the entire
interacting domain can result in alterations of interactions. Further, the sites
of pathogenic variations are closely related to the biophysical strength of the
interactions they perturb. Finally, we show that biochemical alterations
consequent to these variations are considerably more disruptive than evolutionary
changes, with the most significant alterations at the protein interaction
interface.