The regulatory process known as protein ubiquitination modifies cellular proteins with far-reaching impacts on human health and disease. It is involved in every known biological process and is implicated in a growing range of diseases that includes cancers, neurodegenerative diseases, muscle wasting, etc. We are studying the expanding roles of protein ubiquitination to understand underlying principles of the process that can guide future efforts to manipulate or target the process. Over its thirteen-year course, the scope of the project has expanded beyond the single ubiquitin E3 ligase, the breast cancer susceptibility protein, BRCA1/BARD1, and its E2 conjugating enzymes. To reflect our expanding field of investigation and the expanding functionalities of E2s and E3s we have uncovered, the project is renamed """"""""Expanding Roles of E2 and E3 enzymes in Ubiquitin Transfer."""""""" In Aim 1, we will use new mechanistic insights and new technology to generate RING E3s with enhanced activities for use in functional studies.
In Aim 2, we will investigate the RING-Between-RING E3s, newly identified as a novel RING-HECT hybrid class of E3s.
In Aim 3, we seek to define novel mechanisms used by E2s.

Public Health Relevance

The regulatory process known as protein ubiquitination modifies cellular proteins with far---reaching impacts on human health and disease. It is involved in every known biological process and is implicated in a growing range of diseases that includes cancers, neurodegenerative diseases, muscle wasting, etc. We are studying the expanding roles of protein ubiquitination to understand underlying principles of the process that can guide future efforts to manipulate or target the process.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
2R01GM088055-14
Application #
8576938
Study Section
Membrane Biology and Protein Processing (MBPP)
Program Officer
Wehrle, Janna P
Project Start
1998-12-21
Project End
2017-04-30
Budget Start
2013-08-01
Budget End
2014-04-30
Support Year
14
Fiscal Year
2013
Total Cost
$528,224
Indirect Cost
$178,224
Name
University of Washington
Department
Biochemistry
Type
Schools of Medicine
DUNS #
605799469
City
Seattle
State
WA
Country
United States
Zip Code
98195
Akturk, Anil; Wasilko, David J; Wu, Xiaochun et al. (2018) Mechanism of phosphoribosyl-ubiquitination mediated by a single Legionella effector. Nature 557:729-733
DaRosa, Paul A; Harrison, Joseph S; Zelter, Alex et al. (2018) A Bifunctional Role for the UHRF1 UBL Domain in the Control of Hemi-methylated DNA-Dependent Histone Ubiquitylation. Mol Cell 72:753-765.e6
Stewart, Mikaela D; Zelin, Elena; Dhall, Abhinav et al. (2018) BARD1 is necessary for ubiquitylation of nucleosomal histone H2A and for transcriptional regulation of estrogen metabolism genes. Proc Natl Acad Sci U S A 115:1316-1321
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Dove, Katja K; Olszewski, Jennifer L; Martino, Luigi et al. (2017) Structural Studies of HHARI/UbcH7?Ub Reveal Unique E2?Ub Conformational Restriction by RBR RING1. Structure 25:890-900.e5
Stewart, Mikaela D; Duncan, Emily D; Coronado, Ernesto et al. (2017) Tuning BRCA1 and BARD1 activity to investigate RING ubiquitin ligase mechanisms. Protein Sci 26:475-483
Dove, Katja K; Kemp, Hilary A; Di Bona, Kristin R et al. (2017) Two functionally distinct E2/E3 pairs coordinate sequential ubiquitination of a common substrate in Caenorhabditis elegans development. Proc Natl Acad Sci U S A 114:E6576-E6584
Dove, Katja K; Klevit, Rachel E (2017) RING-Between-RING E3 Ligases: Emerging Themes amid the Variations. J Mol Biol 429:3363-3375
Harrison, Joseph S; Cornett, Evan M; Goldfarb, Dennis et al. (2016) Hemi-methylated DNA regulates DNA methylation inheritance through allosteric activation of H3 ubiquitylation by UHRF1. Elife 5:
Dove, Katja K; Stieglitz, Benjamin; Duncan, Emily D et al. (2016) Molecular insights into RBR E3 ligase ubiquitin transfer mechanisms. EMBO Rep 17:1221-35

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