Genomic Analysis of Network Perturbations in Human Disease
I. Perturbations by Viral Proteins
The overriding principle behind all the CCSB CEGS efforts is that making sense of genotype-phenotype relationships requires that phenotypes be viewed as manifestations of network properties, rather than simply the result of genomic variations considered individually.
The central hypothesis of Phase I of this CEGS was that both human genetic variations and pathogens such as viruses similarly influence local and global properties of networks to induce disease states (figure). Our approach to understanding cellular networks was to observe perturbations of network structure by viral pathogen proteins, measuring the effects using interactome mapping, proteomic analysis, and transcriptional profiling.
We integrated measurements of network-level perturbations caused by four selected human DNA tumor virus families (polyomaviruses particularly SV40, papillomaviruses, adenoviruses, and Epstein-Barr virus). The testable hypotheses that resulted present fresh insights into pathology of human disease. Besides dozens of supportive publications dedicated to betterment of screening platforms, virological pathology, and computational analyses, two flagship articles combining the efforts of ALL CEGS participants resulted from these efforts: “Interpreting cancer genomes using systematic host network perturbations by tumour virus proteins”, Nature, 2012 and “Viral perturbations of host networks reflect disease etiology”, PLoS Comput Biol, 2012.
This ‘Virhostome’ work was supported by NHGRI grant P50-HG004233 (Genomic Analysis of Network Perturbations in Human Disease)
Viral perturbations of host networks reflect disease etiology
Many virally implicated human diseases are associated with genetic alterations in particular disease susceptibility genes. For two human DNA tumor viruses, Epstein-Barr virus and human papillomavirus 16, we introduced a network-based framework to model the phenotypic consequences of the viral-host interactions. More…
Global landscape of host perturbations by tumor virus proteins
Emerging exome and complete genome sequencing efforts have identified germline variations associated with cancer predisposition, and have catalogued thousands of somatic genomic alterations. Catalogs of cancer-associated genomic alterations require functional information to interpret their consequences. More…
FAM111A and SV40 large T antigen host range activity
Virus replication depends on interactions between viral and host cell proteins to overcome cellular defenses. The SV40 large T antigen (T-Ag) oncoprotein binds to numerous cellular proteins to enable efficient viral replication. More…
Comparative interactomics of papillomavirus viral-host interactions
Comparative interactomics, that is, homology by network comparison rather than sequence similarity, was applied at large scale to human papillomavirus (HPV) E6 and E7 proteins from 11 distinct HPV genotypes. More…