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2015 ; 29
(8
): 862-75
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A protein interaction map of the LSU processome
#MMPMID25877921
McCann KL
; Charette JM
; Vincent NG
; Baserga SJ
Genes Dev
2015[Apr]; 29
(8
): 862-75
PMID25877921
show ga
Maturation of the large ribosomal subunit (LSU) in eukaryotes is a complex and
highly coordinated process that requires the concerted action of a large,
dynamic, ribonucleoprotein complex, the LSU processome. While we know that >80
ribosome biogenesis factors are required throughout the course of LSU assembly,
little is known about how these factors interact with each other within the LSU
processome. To interrogate its organization and architecture, we took a systems
biology approach and performed a semi-high-throughput, array-based, directed
yeast two-hybrid assay. Assaying 4800 protein-protein interactions, we identified
232 high-confidence, binary-interacting protein pairs, representing a fourfold
increase from current knowledge. The resulting LSU processome interactome map has
enhanced our understanding of the organization and function of the biogenesis
factors within the LSU processome, revealing both novel and previously identified
subcomplexes and hub proteins, including Nop4.