5NL4

Crystal structure of Zn1.3-E16V human ubiquitin (hUb) mutant adduct, from a solution 35 mM zinc acetate/1.3 mM E16V hUb


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.32 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Aggregation Pathways of Native-Like Ubiquitin Promoted by Single-Point Mutation, Metal Ion Concentration, and Dielectric Constant of the Medium.

Fermani, S.Calvaresi, M.Mangini, V.Falini, G.Bottoni, A.Natile, G.Arnesano, F.

(2018) Chemistry 24: 4140-4148

  • DOI: https://doi.org/10.1002/chem.201705543
  • Primary Citation of Related Structures:  
    5NL4, 5NL5, 5NLF, 5NLI, 5NLJ, 5NMC

  • PubMed Abstract: 

    Ubiquitin-positive protein aggregates are biomarkers of neurodegeneration, but the molecular mechanism responsible for their formation and accumulation is still unclear. Possible aggregation pathways of human ubiquitin (hUb) promoted by both intrinsic and extrinsic factors, are here investigated. By a computational analysis, two different hUb dimers are indicated as possible precursors of amyloid-like structures, but their formation is disfavored by an electrostatic repulsion involving Glu16 and other carboxylate residues present at the dimer interface. Experimental data on the E16V mutant of hUb shows that this single-point mutation, although not affecting the overall protein conformation, promotes protein aggregation. It is sufficient to shift the same mutation by only two residues (E18V) to regain the behavior of wild-type hUb. The neutralization of Glu16 negative charge by a metal ion and a decrease of the dielectric constant of the medium by addition of trifluoroethanol (TFE), also promote hUb aggregation. The outcomes of this research have important implications for the prediction of physiological parameters that favor aggregate formation.


  • Organizational Affiliation

    Department of Chemistry "Giacomo Ciamician", University of Bologna, via F. Selmi 2, 40126, Bologna, Italy.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polyubiquitin-C
A, B, C
76Homo sapiensMutation(s): 1 
Gene Names: UBC
UniProt & NIH Common Fund Data Resources
Find proteins for P0CG48 (Homo sapiens)
Explore P0CG48 
Go to UniProtKB:  P0CG48
PHAROS:  P0CG48
GTEx:  ENSG00000150991 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0CG48
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PEG
Query on PEG

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
N [auth B],
P [auth C]
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
I [auth B],
J [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
L [auth B],
M [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
ACT
Query on ACT

Download Ideal Coordinates CCD File 
F [auth A],
K [auth B],
O [auth C]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.32 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.17α = 90
b = 50.33β = 90
c = 93.85γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-26
    Type: Initial release
  • Version 1.1: 2018-01-03
    Changes: Database references
  • Version 1.2: 2018-03-28
    Changes: Database references
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Derived calculations, Refinement description