Primary Citation PubMed: 23416107
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Published in 2014
Alignment of UbH5c subunit of PRC1 ubiquitylation module 22 (PDB ID 3RPG) to Ubc4 in Ubc4/Uba1/ubiquitin structure 24 (PDB ID 4II2).
Publication Year: 2014
Structural model of the hUbA1-UbcH10 quaternary complex: in silico and experimental analysis of the protein-protein interactions between E1, E2 and ubiquitin.
(2014) PLoS One 9
PubMed: 25375166 | PubMedCentral: PMC4223017 | DOI: 10.1371/journal.pone.0112082
Comparison of the refined model with the recently reported X-ray crystallographic structure of the trimeric complex of S. pombe Uba1-Ub-Ubc4 (PDB ID: 4II2) lends support to the theoretical 3D model of... the quaternary complex.
Steered Molecular Dynamics and refinement of the final complex Comparison of the final MD structures and the recently solved X-ray structure of Uba1 in complex with Ubc4 (PDB entry 4II2;  ) showed that the loop masking the hUbA1 catalytic cysteine (Cys-cap loop) prevented a close packing between UbcH10 and the ternary complex.
In contrast, in the available structure of the E1–E2 complex (PDB structure 4II2) the Cys-cap loop is not assigned, thus suggesting a large flexibility in the covalent construct that mimics the thioester crosslinking event.
Figure S6 Superposition of the UbA1 and Ub(A) backbone for the X-ray structure 4II2 (grey) and the 3D model of the quaternary complex (Green).
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