Proximity Label-MS

An interaction is inferred when a bait-enzyme fusion protein selectively modifies a vicinal protein with a diffusible reactive product, followed by affinity capture of the modified protein and identification by mass spectrometric methods.

Publication

Histone Interaction Landscapes Visualized by Crosslinking Mass Spectrometry in Intact Cell Nuclei.

Fasci D, van Ingen H, Scheltema RA, Heck AJR

Cells organize their actions partly through tightly controlled protein-protein interactions-collectively termed the interactome. Here we use crosslinking mass spectrometry (XL-MS) to chart the protein-protein interactions in intact human nuclei. Overall, we identified ∼8,700 crosslinks, of which 2/3 represent links connecting distinct proteins. From these data, we gain insights on interactions involving histone proteins. We observed that core histones on the ... [more]

Mol. Cell Proteomics Dec. 01, 2017; 17(10);2018-2033 [Pubmed: 30021884]

Throughput

  • High Throughput

Additional Notes

  • interaction identified using XL-MS (cross-linking mass spectrometry): TX100-soluble fractions from cells were treated with cross-linker and cross-linked proteins were identified by mass-spectrometry; interaction is undirectional; therefore bait and prey/hit have been assigned arbitrarily; interactions with FDRs (false discovery rates) of 1% or less were reported; this interaction was not detected in parallel experiments using unfractionated cells or TX100-insoluble fractions

Curated By

  • BioGRID