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Human interactome of the influenza B virus NS1 protein. 2017

Corinna Patzina, and Catherine H Botting, and Adolfo García-Sastre, and Richard E Randall, and Benjamin G Hale
Institute of Medical Virology, University of Zurich, Winterthurerstrasse 190, Zurich 8057, Switzerland.

NS1 proteins of influenza A and B viruses share limited sequence homology, yet both are potent manipulators of host cell processes, particularly interferon (IFN) induction. Although many cellular partners are reported for A/NS1, only a few (e.g. PKR and ISG15) have been identified for B/NS1. Here, affinity-purification and mass spectrometry were used to expand the known host interactome of B/NS1. We identified 22 human proteins as new putative targets for B/NS1, validating several, including DHX9, ILF3, YBX1 and HNRNPC. Consistent with two RNA-binding domains in B/NS1, many of the identified factors bind RNA and some interact with B/NS1 in an RNA-dependent manner. Functional characterization of several B/NS1 interactors identified SNRNP200 as a potential positive regulator of host IFN responses, while ILF3 exhibited dual roles in both IFN induction and influenza B virus replication. These data provide a resource for future investigations into the mechanisms underpinning host cell modulation by influenza B virus NS1.

UI MeSH Term Description Entries
D007251 Influenza, Human An acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia. Grippe,Human Flu,Human Influenza,Influenza in Humans,Influenza,Flu, Human,Human Influenzas,Influenza in Human,Influenzas,Influenzas, Human
D009363 Neoplasm Proteins Proteins whose abnormal expression (gain or loss) are associated with the development, growth, or progression of NEOPLASMS. Some neoplasm proteins are tumor antigens (ANTIGENS, NEOPLASM), i.e. they induce an immune reaction to their tumor. Many neoplasm proteins have been characterized and are used as tumor markers (BIOMARKERS, TUMOR) when they are detectable in cells and body fluids as monitors for the presence or growth of tumors. Abnormal expression of ONCOGENE PROTEINS is involved in neoplastic transformation, whereas the loss of expression of TUMOR SUPPRESSOR PROTEINS is involved with the loss of growth control and progression of the neoplasm. Proteins, Neoplasm
D009981 Influenza B virus Species of the genus BETAINFLUENZAVIRUS that cause HUMAN INFLUENZA and other diseases primarily in humans. Antigenic variation is less extensive than in type A viruses (INFLUENZA A VIRUS) and consequently there is no basis for distinct subtypes or variants. Epidemics are less likely than with INFLUENZA A VIRUS and there have been no pandemics. Previously only found in humans, Influenza B virus has been isolated from seals which may constitute the animal reservoir from which humans are exposed. Betainfluenzavirus influenzae,FLUBV,Human Influenza B Virus,Influenza Viruses Type B,Influenza virus type B,Orthomyxoviruses Type B,Influenza B viruses
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D017361 Viral Nonstructural Proteins Proteins encoded by a VIRAL GENOME that are not structural components of VIRUS PARTICLES. Some of these proteins may play roles within the infected cell during VIRUS REPLICATION or act in regulation of virus replication or VIRUS ASSEMBLY. Nonstructural Proteins, Viral,NS Proteins, Viral,Viral NS Proteins,Viral Non-Structural Proteins,Viral Nonstructural Protein,Viral Nonstructural Proteins NS1,Viral Nonstructural Proteins NS2,Nonstructural Protein, Viral,Viral Non Structural Proteins
D050779 Nuclear Factor 90 Proteins A family of double-stranded RNA-binding proteins that are related to NFATC TRANSCRIPTION FACTORS. In addition to binding to RNA, nuclear factor 90 proteins form heterodimeric complexes that regulate GENETIC TRANSCRIPTION and may play a role in T-CELL activation. Interleukin Enhancer Binding Factor 3,Nuclear Factor 90 Protein,ILF3 Protein,M Phase Phosphoprotein 4,NF90 Double-Stranded RNA-Binding Proteins,NF90 Protein,Nuclear Factor 90,Nuclear Factor 90 Protein Complex,NF90 Double Stranded RNA Binding Proteins
D051840 Y-Box-Binding Protein 1 A CCAAT-enhancer-binding protein that was originally identified as interacting with Y-box PROMOTER REGIONS of MHC CLASS II GENES. It is a highly conserved transcription factor that regulates expression of a wide variety of GENES. DNA Binding Protein B,NSEP1 Transcription Factor,Nuclease Sensitive Element Binding Protein 1,Y-Box Binding Protein YB-1,Y-Box Protein-1,Transcription Factor, NSEP1,Y Box Binding Protein 1,Y Box Binding Protein YB 1,Y Box Protein 1
D053487 DEAD-box RNA Helicases A large family of RNA helicases that share a common protein motif with the single letter amino acid sequence D-E-A-D (Asp-Glu-Ala-Asp). In addition to RNA helicase activity, members of the DEAD-box family participate in other aspects of RNA metabolism and regulation of RNA function. DEAD-box RNA Helicase,DEAD Box Helicase p68,p68 DEAD Box Protein,p68 RNA Helicase,DEAD box RNA Helicase,DEAD box RNA Helicases,Helicase, DEAD-box RNA,Helicase, p68 RNA,Helicases, DEAD-box RNA,RNA Helicase, DEAD-box,RNA Helicase, p68,RNA Helicases, DEAD-box

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