A single MIU motif of MINDY ‐1 recognizes K48‐linked polyubiquitin chains
| Autor: | Simone Weidlich, Yosua Adi Kristariyanto, Axel Knebel, Yogesh Kulathu, Syed Arif Abdul Rehman |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Models Molecular Stereochemistry Protein Conformation Amino Acid Motifs Scientific Report Biology Models Biological Biochemistry Deubiquitinating enzyme 03 medical and health sciences Ubiquitin Hydrolase Genetics Protein Interaction Domains and Motifs Amino Acid Sequence Polyubiquitin Molecular Biology Conserved Sequence Ubiquitination Highly selective 030104 developmental biology Tandem Repeat Sequences biology.protein Motif (music) Ubiquitin Thiolesterase Protein Binding |
| Zdroj: | EMBO reports |
| ISSN: | 1469-3178 1469-221X |
| DOI: | 10.15252/embr.201643205 |
| Popis: | The eight different types of ubiquitin (Ub) chains that can be formed play important roles in diverse cellular processes. Linkage‐selective recognition of Ub chains by Ub‐binding domain (UBD)‐containing proteins is central to coupling different Ub signals to specific cellular responses. The motif interacting with ubiquitin (MIU) is a small UBD that has been characterized for its binding to monoUb. The recently discovered deubiquitinase MINDY‐1/FAM63A contains a tandem MIU repeat (tMIU) that is highly selective at binding to K48‐linked polyUb. We here identify that this linkage‐selective binding is mediated by a single MIU motif (MIU2) in MINDY‐1. The crystal structure of MIU2 in complex with K48‐linked polyubiquitin chains reveals that MIU2 on its own binds to all three Ub moieties in an open conformation that can only be accommodated by K48‐linked triUb. The weak Ub binder MIU1 increases overall affinity of the tMIU for polyUb chains without affecting its linkage selectivity. Our analyses reveal new concepts for linkage selectivity and polyUb recognition by UBDs. |
| Databáze: | OpenAIRE |
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