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Title: Mechanism of selective recognition of Lys48-linked polyubiquitin by macrocyclic peptide inhibitors of proteasomal degradation

Journal Article · · Nature Communications

Post-translational modification of proteins with polyubiquitin chains is a critical cellular signaling mechanism in eukaryotes with implications in various cellular states and processes. Unregulated ubiquitin-mediated protein degradation can be detrimental to cellular homeostasis, causing numerous diseases including cancers. Recently, macrocyclic peptides were developed that selectively target long Lysine-48-linked polyubiquitin chains (tetra-ubiquitin) to inhibit ubiquitin-proteasome system, leading to attenuation of tumor growth in vivo. However, structural determinants of the chain length and linkage selectivity by these cyclic peptides remained unclear. Here, we uncover the mechanism underlying cyclic peptide’s affinity and binding selectivity by combining X-ray crystallography, solution NMR, and biochemical studies. We found that the peptide engages three consecutive ubiquitins that form a ring around the peptide and determined requirements for preferential selection of a specific trimer moiety in longer polyubiquitin chains. The structural insights gained from this work will guide the development of next-generation cyclic peptides with enhanced anti-cancer activity.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Institutes of Health (NIH)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2470181
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 14; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (65)

High Relaxivity Supramolecular Adducts Between Human‐Liver Fatty‐Acid‐Binding Protein and Amphiphilic GdIII Complexes: Structural Basis for the Design of Intracellular Targeting MRI Probes journal July 2012
Interdomain mobility in di-ubiquitin revealed by NMR journal February 2006
Ubiquitin–proteasome system (UPS) as a target for anticancer treatment journal November 2020
Structure of ubiquitin refined at 1.8 Å resolution journal April 1987
Structure of a diubiquitin conjugate and a model for interaction with ubiquitin conjugating enzyme (E2). journal August 1992
Structural Properties of Polyubiquitin Chains in Solution journal December 2002
Polyubiquitin chains: polymeric protein signals journal December 2004
Enhanced Protein Degradation by Branched Ubiquitin Chains journal May 2014
Unanchored K48-Linked Polyubiquitin Synthesized by the E3-Ubiquitin Ligase TRIM6 Stimulates the Interferon-IKKε Kinase-Mediated Antiviral Response journal June 2014
Crystal Structure and Solution NMR Studies of Lys48-linked Tetraubiquitin at Neutral pH journal March 2007
Inference of Macromolecular Assemblies from Crystalline State journal September 2007
Evidence for Bidentate Substrate Binding as the Basis for the K48 Linkage Specificity of Otubain 1 journal March 2009
Alanine Scan of Core Positions in Ubiquitin Reveals Links between Dynamics, Stability, and Function journal April 2014
Structural Determinants for Selective Recognition of a Lys48-Linked Polyubiquitin Chain by a UBA Domain journal June 2005
The Size of the Proteasomal Substrate Determines Whether Its Degradation Will Be Mediated by Mono- or Polyubiquitylation journal October 2012
Determining domain orientation in macromolecules by using spin-relaxation and residual dipolar coupling measurements journal July 2004
Mixed-Linkage Ubiquitin Chains Send Mixed Messages journal May 2013
Linkage via K27 Bestows Ubiquitin Chains with Unique Properties among Polyubiquitins journal March 2016
Structural Basis for the Inhibitory Effects of Ubistatins in the Ubiquitin-Proteasome Pathway journal December 2017
Branching via K11 and K48 Bestows Ubiquitin Chains with a Unique Interdomain Interface and Enhanced Affinity for Proteasomal Subunit Rpn1 journal January 2020
Metabolism of the polyubiquitin degradation signal: structure, mechanism, and role of isopeptidase T journal November 1995
Mitochondrial apoptosis: killing cancer using the enemy within journal March 2015
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Ubiquitylation at the crossroads of development and disease journal September 2017
Ubiquitin and ubiquitin-like proteins as multifunctional signals journal August 2005
Ubiquitin-binding domains journal August 2005
Breaking the chains: structure and function of the deubiquitinases journal August 2009
The role of ubiquitination in tumorigenesis and targeted drug discovery journal February 2020
Modulating proteasome inhibitor tolerance in multiple myeloma: an alternative strategy to reverse inevitable resistance journal November 2020
Selective macrocyclic peptide modulators of Lys63-linked ubiquitin chains disrupt DNA damage repair journal October 2022
De novo macrocyclic peptides that specifically modulate Lys48-linked ubiquitin chains journal June 2019
PROTAC targeted protein degraders: the past is prologue journal January 2022
Targeting the duality of cancer journal June 2017
Linkage-specific conformational ensembles of non-canonical polyubiquitin chains journal January 2016
Chemical and semisynthetic approaches to study and target deubiquitinases journal January 2016
In vivo modulation of ubiquitin chains by N-methylated non-proteinogenic cyclic peptides journal January 2021
Ubiquitin-binding domains journal October 2006
K63 ubiquitylation triggers proteasomal degradation by seeding branched ubiquitin chains journal January 2018
Surface hydrophobic residues of multiubiquitin chains essential for proteolytic targeting. journal January 1996
Distinct Functional Surface Regions on Ubiquitin journal June 2001
Recognition of Polyubiquitin Isoforms by the Multiple Ubiquitin Binding Modules of Isopeptidase T journal July 2008
Development of the Proteasome Inhibitor Velcade™ (Bortezomib) journal January 2004
NMRFAM-SPARKY: enhanced software for biomolecular NMR spectroscopy journal December 2014
Recognition of the polyubiquitin proteolytic signal journal January 2000
Phaser crystallographic software journal July 2007
On the treatment of negative intensity observations journal July 1978
Coot model-building tools for molecular graphics journal November 2004
HKL -3000: the integration of data reduction and structure solution – from diffraction images to an initial model in minutes journal July 2006
Surprises and pitfalls arising from (pseudo)symmetry journal December 2007
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
Overview of the CCP 4 suite and current developments journal March 2011
REFMAC 5 for the refinement of macromolecular crystal structures journal March 2011
JLigand : a graphical tool for the CCP 4 template-restraint library journal March 2012
Targeting the ubiquitin‐proteasome system for cancer therapy journal January 2009
Ubistatins Inhibit Proteasome-Dependent Degradation by Binding the Ubiquitin Chain journal October 2004
The Ubiquitin Code journal July 2012
Mechanisms of Deubiquitinase Specificity and Regulation journal June 2017
The Ubiquitin System journal June 1998
The Ubiquitin-Proteasome Proteolytic Pathway: Destruction for the Sake of Construction journal April 2002
Proteotoxic crisis, the ubiquitin-proteasome system, and cancer therapy journal November 2014
Construct for High-Level Expression and Low Misincorporation of Lysine for Arginine During Expression of pET-Encoded Eukaryotic Proteins in Escherichia coli journal November 1999
Unanchored Ubiquitin Chains, Revisited journal October 2020
Targeting the Ubiquitin-Proteasome System for Cancer Therapeutics by Small-Molecule Inhibitors journal June 2021
Structure and recognition of polyubiquitin chains of different lengths and linkage journal December 2011
Ubiquitin becomes ubiquitous in cancer: Emerging roles of ubiquitin ligases and deubiquitinases in tumorigenesis and as therapeutic targets journal October 2010