Journal: bioRxiv
Article Title: Concerted remodelling of the postsynaptic spine and RNA granule by cLTP
doi: 10.1101/2025.07.16.665171
Figure Lengend Snippet: a , Experimental design of biotinylation assays in cortical neurons under basal, cLTP and post-cLTP conditions. b , A representative αFLAG immunofluorescence image of cortical neurons expressing FLAG-APEX2 fused to a nuclear export signal sequence from a lentiviral vector. c , Proteomic analysis of streptavidin pulldown and input samples from cortical neurons subject to biotin labelling under basal conditions. d , Pulldown to input ratios as a function of the predicted number of surface tyrosines per protein. e , Volcano plot with enrichment scores for the indicated selection of protein sets (bubble size indicates protein number in each protein set). f , Tyrosine surface exposure in ribosomal proteins with low and high accessibility scores as determined by their streptavidin pulldown / input ratios. g , Accessibility scores corresponding to ribosomal proteins as a function of the number of surface tyrosines hidden in the 80S ribosome under basal (blue) and cLTP (orange) conditions. h , Proteomic analysis of cortical neurons under basal and cLTP conditions. Ribosomal proteins are indicated (red dots).
Article Snippet: Lentiviral constructs pLKO-RFP-shCtrl (Addgene, 69040) and pLKO-RFP-shDbn1 containing the shRNA sequence GCAGTCTATCTTTGGTGACCA (TRCN0000090077) against the Dbn1 gene were used in knockdown experiments. pFUW-FLAG-APEX2, pFUW-FLAG-APEX2-DBN1 and pFUW-FLAG-APEX2-IGF2BP1 were used to perform accessibility and proximity assays, and derived from pcDNA3 APEX2-NES (Addgene, 49386) and pFUW (Addgene, 14882).
Techniques: Immunofluorescence, Expressing, Sequencing, Plasmid Preparation, Selection