Solution-state NMR structural ensemble of human Tsg101 UEV in complex with tenatoprazole

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.2 of the entry. See complete history


Tsg101 chaperone function revealed by HIV-1 assembly inhibitors.

Strickland, M.Ehrlich, L.S.Watanabe, S.Khan, M.Strub, M.P.Luan, C.H.Powell, M.D.Leis, J.Tjandra, N.Carter, C.A.

(2017) Nat Commun 8: 1391-1391

  • DOI: https://doi.org/10.1038/s41467-017-01426-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    HIV-1 replication requires Tsg101, a component of cellular endosomal sorting complex required for transport (ESCRT) machinery. Tsg101 possesses an ubiquitin (Ub) E2 variant (UEV) domain with a pocket that can bind PT/SAP motifs and another pocket that can bind Ub. The PTAP motif in the viral structural precursor polyprotein, Gag, allows the recruitment of Tsg101 and other ESCRTs to virus assembly sites where they mediate budding. It is not known how or even whether the UEV Ub binding function contributes to virus production. Here, we report that disruption of UEV Ub binding by commonly used drugs arrests assembly at an early step distinct from the late stage involving PTAP binding disruption. NMR reveals that the drugs form a covalent adduct near the Ub-binding pocket leading to the disruption of Ub, but not PTAP binding. We conclude that the Ub-binding pocket has a chaperone function involved in bud initiation.

  • Organizational Affiliation

    Laboratory of Molecular Biophysics, Biochemistry and Biophysics Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tumor susceptibility gene 101 protein145Homo sapiensMutation(s): 1 
Gene Names: TSG101
UniProt & NIH Common Fund Data Resources
Find proteins for Q99816 (Homo sapiens)
Explore Q99816 
Go to UniProtKB:  Q99816
GTEx:  ENSG00000074319 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99816
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 4N1

Download Ideal Coordinates CCD File 
B [auth A]4-methoxy-1-(5-methoxy-3H-imidazo[4,5-b]pyridin-2-yl)-3,5-dimethyl-2-(sulfanylmethyl)pyridin-1-ium
C16 H19 N4 O2 S
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-11-15
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Other