Comprehensive proteomic and transcriptomic characterization of hepatic expression signatures affected in p14 liver conditional knockout mice.
Scaffold proteins regulate intracellular MAP kinase signaling by providing critical spatial and temporal specificities. We have shown previously that the scaffold protein MEK1 partner (MP1) is localized to late endosomes by the adaptor protein p14. Using conditional gene disruption of p14 in livers of mice (p14(Δhep) ) we analyzed protein and transcript signatures in tissue samples. Further biological network analysis predicted that the differentially expressed transcripts and proteins are involved in cell cycle progression and regulation of cellular proliferation. Although some of the here identified signatures were previously linked to phospho-ERK activity, most of them were novel targets of the late endosomal p14/MP1/MEK/ERK signaling module. Finally, the proliferation defect was confirmed in a chemically induced liver regeneration model in p14(Δhep) knockout mice.
Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria.
Ivan
I
Prokudin
Taras
T
Stasyk
Johannes
J
Rainer
Guenther K
GK
Bonn
Reinhard
R
Kofler
Lukas A
LA
Huber
D000818:Animals; D015415:Biomarkers / Q000032:analysis / Q000378:metabolism*; D015180:Electrophoresis, Gel, Two-Dimensional; D005260:Female; D020869:Gene Expression Profiling; D015151:Immunoblotting; D019426:Integrases / Q000378:metabolism; D008115:Liver Regeneration; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D020411:Oligonucleotide Array Sequence Analysis; D011506:Proteins / Q000502:physiology*; D020543:Proteome / Q000032:analysis / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
D015415:Biomarkers; C426009:LAMTOR2 protein, mouse; D011506:Proteins; D020543:Proteome; D012333:RNA, Messenger; C045073:Cre recombinase; D019426:Integrases