Dataset Information

Interactome analysis for Gore-tex/Osiris23 and identification of ubiquitination sites in Gore-tex/Osiris23

ABSTRACT: To identify the proteins interacting with Gore-tex/Osiris23, affinity purification mass spectrometry (AP-MS) was performed using S2 cells transfected with HA or Flag-tagged Gore-tex/Osiris23 expression vectors. PTM analysis was also performed to determine the ubiquitination sites of Gore-tex/Osiris23.

ORGANISM(S): Drosophila Melanogaster (fruit Fly)

SUBMITTER: Shigeo Hayashi

PROVIDER: PXD053779 | JPOST Repository | Thu Mar 12 00:00:00 GMT 2026

REPOSITORIES: jPOST

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Publications

Endoplasmic reticulum patterns insect cuticle nanostructure.

Inagaki Sachi S Wada Housei H Itabashi Takeshi T Itakura Yuki Y Nakagawa Reiko R Chen Lin L Murata Kazuyoshi K Iwane Atsuko H AH Hayashi Shigeo S

The Journal of cell biology 20251229 2

Insect cuticles with nano-level structures exhibit functional surface properties such as the photonic nanocrystal of the butterfly wing scale with structural color and the corneal nipple arrays of superhydrophobic compound eye lens. Despite the enormous influence the cuticle has had on biomimetic industrial applications, cellular mechanisms of cuticular nanopatterning remain poorly understood. Drosophila gore-tex/Osiris23 (gox) controls the formation of nanopores, with a molecular filtering func ...[more]

PMID: 41474612

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Project description:NguyenLK2011 - Ubiquitination dynamics in Ring1B-Bmi1 system This theoretical model investigates the dynamics of Ring1B/Bmi1 ubiquitination to identify bistable switch-like and oscillatory behaviour in the system. Michaelis-Menten (MM) equations are used to formulate the model. However, the authors show that the dynamics persist even for Mass-Action kinetics. This SBML file is the MM version of the model. This model is described in the article: Switches, excitable responses and oscillations in the Ring1B/Bmi1 ubiquitination system. Nguyen LK, Muñoz-García J, Maccario H, Ciechanover A, Kolch W, Kholodenko BN. PLoS Comput. Biol. 2011 Dec; 7(12): e1002317 Abstract: In an active, self-ubiquitinated state, the Ring1B ligase monoubiquitinates histone H2A playing a critical role in Polycomb-mediated gene silencing. Following ubiquitination by external ligases, Ring1B is targeted for proteosomal degradation. Using biochemical data and computational modeling, we show that the Ring1B ligase can exhibit abrupt switches, overshoot transitions and self-perpetuating oscillations between its distinct ubiquitination and activity states. These different Ring1B states display canonical or multiply branched, atypical polyubiquitin chains and involve association with the Polycomb-group protein Bmi1. Bistable switches and oscillations may lead to all-or-none histone H2A monoubiquitination rates and result in discrete periods of gene (in)activity. Switches, overshoots and oscillations in Ring1B catalytic activity and proteosomal degradation are controlled by the abundances of Bmi1 and Ring1B, and the activities and abundances of external ligases and deubiquitinases, such as E6-AP and USP7. This model is hosted on BioModels Database and identified by: BIOMD0000000622. To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.

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