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Molecular recognition of M1-linked ubiquitin chains by native and phosphorylated UBAN domains

Lina Herhaus, Henry van den Bedem, Sean Tang, Soichi Wakatsuki, Ivan Dikic, Simin Rahighi
doi: https://doi.org/10.1101/521815
Lina Herhaus
1Institute of Biochemistry II, Goethe University School of Medicine, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany
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Henry van den Bedem
2Biosciences Division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
3Department of Therapeutic Sciences and Bioengineering, University of California, San Francisco, CA 94158, USA
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Sean Tang
4Chapman University School of Pharmacy (CUSP), Harry and Diane Rinker Health Science Campus, Chapman University, Irvine, CA 92618, USA
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Soichi Wakatsuki
2Biosciences Division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
5Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
6Structural Molecular Biology, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
7Photon Science, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
8Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
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  • For correspondence: rahighi@chapman.edu ivan.dikic@biochem2.de soichi.wakatsuki@stanford.edu
Ivan Dikic
1Institute of Biochemistry II, Goethe University School of Medicine, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany
9Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Riedberg Campus, Max-von-Laue-Straße 15, 60438 Frankfurt am Main, Germany
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  • For correspondence: rahighi@chapman.edu ivan.dikic@biochem2.de soichi.wakatsuki@stanford.edu
Simin Rahighi
4Chapman University School of Pharmacy (CUSP), Harry and Diane Rinker Health Science Campus, Chapman University, Irvine, CA 92618, USA
8Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
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  • For correspondence: rahighi@chapman.edu ivan.dikic@biochem2.de soichi.wakatsuki@stanford.edu
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Abstract

Although the Ub-binding domain in ABIN proteins and NEMO (UBAN) is highly conserved, UBAN-containing proteins exhibit different Ub-binding properties, resulting in their diverse biological roles. Post-translational modifications further control UBAN domain specificity for poly-Ub chains. However, precisely, how the UBAN domain structurally confers such functional diversity remains poorly understood. Here we report crystal structures of ABIN-1 alone and in complex with one or two M1-linked di-Ub chains. ABIN-1 UBAN forms a homo-dimer that provides two symmetrical Ub-binding sites on either side of the coiled-coil structure. Moreover, crystal structures of ABIN1 UBAN in complex with di-Ub chains reveal a concentration-dependency of UBAN/di-Ub binding stoichiometry. Analysis of UBAN/M1-linked di-Ub binding characteristics indicates that phosphorylated S473 in OPTN and its corresponding phospho-mimetic residue in ABIN-1 (E484) are essential for high affinity interactions with M1-linked Ub chains. Also, a phospho-mimetic mutation of A303 in NEMO, corresponding to S473 of OPTN, increases binding affinity for M1-linked Ub chains. These findings are in line with the diverse physiological roles of UBAN domains, as phosphorylation of OPTN UBAN is required to enhance its binding to Ub during mitophagy.

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Posted January 16, 2019.
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Molecular recognition of M1-linked ubiquitin chains by native and phosphorylated UBAN domains
Lina Herhaus, Henry van den Bedem, Sean Tang, Soichi Wakatsuki, Ivan Dikic, Simin Rahighi
bioRxiv 521815; doi: https://doi.org/10.1101/521815
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Molecular recognition of M1-linked ubiquitin chains by native and phosphorylated UBAN domains
Lina Herhaus, Henry van den Bedem, Sean Tang, Soichi Wakatsuki, Ivan Dikic, Simin Rahighi
bioRxiv 521815; doi: https://doi.org/10.1101/521815

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