scholarly journals JCSG – Adapting Structural Genomics to Eukaryotic Complexes

2014 ◽  
Vol 70 (a1) ◽  
pp. C1148-C1148
Author(s):  
Marc-André Elsliger ◽  
Ashley Deacon ◽  
Adam Godzik ◽  
Scott Lesley ◽  
Keith Hodgson ◽  
...  

For over a decade, the Joint Center for Structural Genomics (JCSG.org) has been at the forefront of developing tools and methodologies that enable the application of high-throughput structural biology (HTBSB) approaches to a broad range of challenging biological and biomedical problems. In PSI:Biology (2010-2015) to meet the challenges and embrace the opportunities that arise from our Partnerships projects, we have leveraged our gene-to-structure pipeline to explore challenging projects focused on structural characterization of interaction networks involved in stem cell regulation, T-cell activation and nuclear receptor signaling. These highly collaborative efforts have enabled development of systematic and integrative approaches for identifying and investigating networks of key multi-domain eukaryotic proteins and higher order assemblies of multi-component eukaryotic protein/protein and protein/nucleic acid complexes. In parallel, our biomedical theme project has focused on investigating host/microbe interactions of the microbial communities that inhabit specific niches and environments of the human body, e.g. the human gut microbiome. These efforts to date have been centered on secreted proteins from commensal bacteria in the human gut. The symbiotic relationship and influence on human development, physiology, immunity, and nutrition represent an exciting new frontier for HTBSB where we can investigate how these microorganisms contribute to human health as well as to disease. The JCSG also strives to promote widespread use of PSI resources, materials, methodologies and data to the general scientific community, via Community Nominated Target (CNT) projects and development and use of new technologies and methodologies. We also continue to contribute to the original PSI mission of structural coverage of the expanding protein universe. Supported by NIH U54-GM094586.

2019 ◽  
Vol 4 (1) ◽  
pp. 147 ◽  
Author(s):  
Joshua Jorge Vasquez ◽  
Brandon L. Aguilar-Rodriguez ◽  
Leonardo Rodriguez ◽  
Louise E. Hogan ◽  
Ma Somsouk ◽  
...  

Background: Identifying biomarkers for cells harboring replication-competent HIV is a major research priority. Recently, there have been mixed reports addressing the possibility that CD32-expressing T-cells are enriched for HIV. There is growing evidence that CD32 expression increases with cellular activation that may be related to, but not necessarily specific for, infection with HIV.  However, the relationship of CD32 expression to HIV-infection in subtypes of tissue-resident leukocytes is unclear.  Methods: First, we used duplex chromogenic in situ hybridization to identify cells actively transcribing RNA for both CD32 and HIV on human gut tissues. Then we performed multiplexed immunofluorescence and in situ hybridization (mIFISH) on sections from the same tissues to determine the phenotype of individual cells co-expressing HIV-RNA and CD32-RNA.  Results: HIV-RNA+ cells were more abundant in tissues from viremic individuals compared to those on suppressive anti-retroviral therapy (ART). However, staining by both methods indicated that a higher proportion of HIV-RNA+ cells co-expressed CD32-RNA in ART-suppressed compared to viremic individuals. The majority of HIV-RNA+ cells were CD3+.Conclusions: Our data suggest that the transcription of CD32-RNA is correlated with HIV transcriptional activity in CD3+ cells found within human gut tissue. Whether or not up-regulation of CD32-RNA is a direct result of HIV reactivation or more global T cell activation remains unclear.


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