Signal Integration by the IκB Protein Pickle Shapes Drosophila Innate Host Defense.
MetadataShow full item record
Pattern recognition receptors are activated following infection and trigger transcriptional programs important for host defense. Tight regulation of NF-κB activation is critical to avoid detrimental and misbalanced responses. We describe Pickle, a Drosophila nuclear IκB that integrates signaling inputs from both the Imd and Toll pathways by skewing the transcriptional output of the NF-κB dimer repertoire. Pickle interacts with the NF-κB protein Relish and the histone deacetylase dHDAC1, selectively repressing Relish homodimers while leaving other NF-κB dimer combinations unscathed. Pickle's ability to selectively inhibit Relish homodimer activity contributes to proper host immunity and organismal health. Although loss of pickle results in hyper-induction of Relish target genes and improved host resistance to pathogenic bacteria in the short term, chronic inactivation of pickle causes loss of immune tolerance and shortened lifespan. Pickle therefore allows balanced immune responses that protect from pathogenic microbes while permitting the establishment of beneficial commensal host-microbe relationships.
Version of record
Protein Interaction Mapping
I-kappa B Proteins
Histone Deacetylase 1
Cell Death and Immunity
Target Discovery & Apoptosis
License start date
Cell host & microbe, 2016, 20 (3), pp. 283 - 295
Showing items related by title, author, creator and subject.
Phosphorylation-mediated interactions with TOPBP1 couple 53BP1 and 9-1-1 to control the G1 DNA damage checkpoint. Bigot, N; Day, M; Baldock, RA; Watts, FZ; Oliver, AW; Pearl, LH (2019-05-28)Coordination of the cellular response to DNA damage is organised by multi-domain 'scaffold' proteins, including 53BP1 and TOPBP1, which recognise post-translational modifications such as phosphorylation, methylation and ...
Structural Basis for Auto-Inhibition of the NDR1 Kinase Domain by an Atypically Long Activation Segment. Xiong, S; Lorenzen, K; Couzens, AL; Templeton, CM; Rajendran, D; Mao, DYL; Juang, Y-C; Chiovitti, D; Kurinov, I; Guettler, S; Gingras, A-C; Sicheri, F (2018-08)The human NDR family kinases control diverse aspects of cell growth, and are regulated through phosphorylation and association with scaffolds such as MOB1. Here, we report the crystal structure of the human NDR1 kinase ...
Mardakheh, FK; Self, A; Marshall, CJ (2016-12)Directional cell migration involves reorientation of the secretory machinery. However, the molecular mechanisms that control this reorientation are not well characterised. Here, we identify a new Rho effector protein, named ...