Table 1.

RUSH-protein partners identified by μLC/MS/MS analysis.

	Tyrosine-phosphorylated	Nucleolar-affiliated
A. Partners that bind the RING-finger motif
Nucleolin	√	√
Ribosomal protein L10		√
HSP 70kDa protein 9B
B. Heterogeneous nuclear ribonucleoproteins
hnRNP U isoform	√
hnRNP A1	√
hnRNP A3 isoform 1
C. Histones
Core Histone macro-H2A.1		√
Histone H1.1		√
D. Chaperones
HSP 90α	√	√
HSP 90β	√	√
Endoplasmin (GRP94)		√
Nucleophosmin	√	√
E. RNA Helicases
RNA Helicase II/Gu protein	√
DEAD-box polypeptide 17 isoform p82	√	√
F. DNA Replication
DNA Topoisomerase I		√
G. Splicing Factors
Splicing factor 3a, subunit 1	√
H. Transcription regulator
Actin