Dataset Information

Quantitative proteomics of rat livers shows that unrestricted feeding and re-feeding after food restriction are stressful for cellular proteostasis

ABSTRACT: We used quantitative MS-based proteomic analysis of whole rat livers to study the molecular events associated with a food restriction regimen as compared with ad libitum food and animals re-fed after a restriction time.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Rattus Norvegicus (rat)

TISSUE(S): Liver

SUBMITTER: Manfredo Quadroni

LAB HEAD: Pierre Goloubinoff

PROVIDER: PXD004068 | Pride | 2016-12-23

REPOSITORIES: Pride

ACCESS DATA

Publications

Quantitative proteomics of rat livers shows that unrestricted feeding is stressful for proteostasis with implications on life span.

Gat-Yablonski Galia G Finka Andrija A Pinto Galit G Quadroni Manfredo M Shtaif Biana B Goloubinoff Pierre P

Aging 20160801 8

Studies in young mammals on the molecular effects of food restriction leading to prolong adult life are scares. Here, we used high-throughput quantitative proteomic analysis of whole rat livers to address the molecular basis for growth arrest and the apparent life-prolonging phenotype of the food restriction regimen. Over 1800 common proteins were significantly quantified in livers of ad libitum, restriction- and re-fed rats, which summed up into 92% of the total protein mass of the cells. Compa ...[more]

PMID: 27508340

Similar Datasets

Project description:Nup133 belongs to the Y-complex, a key component of the nuclear pore complex (NPC) scaffold. Studies on a null mutation in mice previously revealed that Nup133 is essential for embryonic development but not for mouse embryonic stem cells (mESCs) proliferation. Using single pore detection and average NE-fluorescence intensity, we find that Nup133 is dispensable for interphase and postmitotic NPC scaffold assembly in pluripotent mESCs. However, loss of Nup133 specifically perturbs the formation of the nuclear basket as manifested by the absence of Tpr in about half of the NPCs combined with altered dynamics of Nup153. Nup153 is a large multifunctional protein that interacts with both the Y-complex and Tpr through its N-terminal NPC-targeting domain (NTD, [aa 1-339]) (Hase and Cordes, 2003; Vasu et al., 2001). To explore the possibility that the interaction between Nup153-NTD and the Y-complex or Tpr requires Nup133, we performed pull down assays on whole protein extracts from WT and Nup133-/- mESCs using recombinant Nup153-NTD [aa 1-339] as bait. Nup153 [aa 1-245], lacking the binding domains for the Y-complex and Tpr served as control. Western blot and quantitative mass spectrometry analyses detected Nup133 only in WT samples and documented its specific enrichment, along with other tested Y-Nups and Tpr, in the Nup153-NTD [aa 1-339] bound fraction. These analyses also revealed a similar enrichment of Tpr and Y-complex proteins in Nup153-NTD [aa 1-339]-purified extracts from either WT or Nup133-/- mESCs. These data show that in the context of whole cell lysates containing NPCs as dissociated subcomplexes, the lack of Nup133 neither precludes nor appreciably affects the biochemical interaction between Nup153-NTD and the Y-complex or Tpr. This differs from the in vivo situation that revealed a measurable impact of Nup133 on Nup153 dynamics and Tpr localization in the context of assembled NPCs. This apparent discrepancy between our in vitro and in vivo data indicates that the structural integrity of the NPC is likely required to visualize the contribution of Nup133 to the binding of Nup153 to Tpr or to the Y-complex. Hase, M.E., and Cordes, V.C. (2003). Direct interaction with nup153 mediates binding of Tpr to the periphery of the nuclear pore complex. Mol Biol Cell 14, 1923-1940. Vasu, S., Shah, S., Orjalo, A., Park, M., Fischer, W.H., and Forbes, D.J. (2001). Novel vertebrate nucleoporins Nup133 and Nup160 play a role in mRNA export. J Cell Biol 155, 339-354.

Dataset Information

Quantitative proteomics of rat livers shows that unrestricted feeding and re-feeding after food restriction are stressful for cellular proteostasis

Publications

Quantitative proteomics of rat livers shows that unrestricted feeding is stressful for proteostasis with implications on life span.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure