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2DOS

Structural basis for the recognition of Lys48-linked polyubiquitin chain by the Josephin domain of ataxin-3, a putative deubiquitinating enzyme

Summary for 2DOS
Entry DOI10.2210/pdb2dos/pdb
DescriptorAtaxin-3 (1 entity in total)
Functional Keywordsdeubiquitinating enzyme, hydrolase
Biological sourceHomo sapiens (human)
Cellular locationNucleus matrix : P54252
Total number of polymer chains1
Total formula weight20162.67
Authors
Sumiyoshi, A. (deposition date: 2006-05-03, release date: 2007-05-22, Last modification date: 2024-05-01)
Primary citationSatoh, T.,Sumiyoshi, A.,Yagi-Utsumi, M.,Sakata, E.,Sasakawa, H.,Kurimoto, E.,Yamaguchi, Y.,Li, W.,Joazeiro, C.A.,Hirokawa, T.,Kato, K.
Mode of substrate recognition by the Josephin domain of ataxin-3, which has an endo-type deubiquitinase activity.
Febs Lett., 588:4422-4430, 2014
Cited by
PubMed Abstract: Ataxin-3, which is encoded by a gene that has been associated with Machado-Joseph disease, contains a catalytic N-terminal Josephin domain with deubiquitinase activity. Here, we show that the Josephin domain of ataxin 3 catalyzes endo-type cleavage of Lys48-linked polyubiquitin. Furthermore, NMR data obtained following site-specific paramagnetic spin labeling of Lys48-linked di-ubiquitin revealed that both ubiquitin units interact with the Josephin domain, with the C-terminal Gly76 of the proximal unit being situated in the vicinity of the catalytic triad of Josephin domain. Our results help to elucidate how the substrate is recognized by the Josephin domain and properly positioned for an endo-type deubiquitination reaction.
PubMed: 25448680
DOI: 10.1016/j.febslet.2014.10.013
PDB entries with the same primary citation
Experimental method
SOLUTION NMR
Structure validation

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