6GOP

Yeast 20S Proteasome in complex with Homosalinosporamide A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

(-)-Homosalinosporamide A and Its Mode of Proteasome Inhibition: An X-ray Crystallographic Study.

Groll, M.Nguyen, H.Vellalath, S.Romo, D.

(2018) Mar Drugs 16

  • DOI: https://doi.org/10.3390/md16070240
  • Primary Citation of Related Structures:  
    6GOP

  • PubMed Abstract: 

    Upon acylation of the proteasome by the β-lactone inhibitor salinosporamide A (SalA), tetrahydrofuran formation occurs by intramolecular alkylation of the incipient alkoxide onto the choroethyl sidechain and irreversibly blocks the active site. Our previously described synthetic approach to SalA, utilizing a bioinspired, late-stage, aldol-β-lactonization strategy to construct the bicyclic β-lactone core, enabled synthesis of (⁻)-homosalinosporamide A (homoSalA). This homolog was targeted to determine whether an intramolecular tetrahydropyran is formed in a similar manner to SalA. Herein, we report the X-ray structure of the yeast 20S proteasome:homoSalA-complex which reveals that tetrahydropyran ring formation does not occur despite comparable potency at the chymotrypsin-like active site in a luminogenic enzyme assay. Thus, the natural product derivative homoSalA blocks the proteasome by a covalent reversible mode of action, opening the door for further fine-tuning of proteasome inhibition.


  • Organizational Affiliation

    Center for Integrated Protein Science Munich at the Department Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany. michael.groll@tum.de.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-2
A, O
250Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P23639 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P23639 
Go to UniProtKB:  P23639
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP23639
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-3
B, P
258Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P23638 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P23638 
Go to UniProtKB:  P23638
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP23638
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-4
C, Q
254Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P40303 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40303 
Go to UniProtKB:  P40303
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40303
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-5
D, R
260Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P32379 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32379 
Go to UniProtKB:  P32379
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32379
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-6
E, S
234Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P40302 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40302 
Go to UniProtKB:  P40302
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40302
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Probable proteasome subunit alpha type-7
F, T
288Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P21242 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P21242 
Go to UniProtKB:  P21242
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21242
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-1
G, U
252Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P21243 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P21243 
Go to UniProtKB:  P21243
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21243
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-2
H, V
232Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P25043 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25043 
Go to UniProtKB:  P25043
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25043
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-3
I, W
205Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P25451 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25451 
Go to UniProtKB:  P25451
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25451
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-4
J, X
198Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P22141 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P22141 
Go to UniProtKB:  P22141
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22141
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-5
K, Y
212Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P30656 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P30656 
Go to UniProtKB:  P30656
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP30656
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-6
L, Z
222Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P23724 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P23724 
Go to UniProtKB:  P23724
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP23724
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-7AA [auth a],
M
246Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P30657 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P30657 
Go to UniProtKB:  P30657
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP30657
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-1BA [auth b],
N
196Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.4.25.1
UniProt
Find proteins for P38624 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38624 
Go to UniProtKB:  P38624
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP38624
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
F6K
Query on F6K

Download Ideal Coordinates CCD File 
EA [auth H]
HA [auth K]
KA [auth N]
OA [auth V]
PA [auth Y]
EA [auth H],
HA [auth K],
KA [auth N],
OA [auth V],
PA [auth Y],
RA [auth b]
Homosalinosporamide A - bound form
C16 H24 Cl N O4
XHBWODCKUDRKAV-VRUQUDLLSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
DA [auth G],
MA [auth N],
NA [auth U],
SA [auth b]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG
Query on MG

Download Ideal Coordinates CCD File 
CA [auth G]
FA [auth I]
GA [auth J]
IA [auth K]
JA [auth L]
CA [auth G],
FA [auth I],
GA [auth J],
IA [auth K],
JA [auth L],
LA [auth N],
QA [auth Z]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 135.04α = 90
b = 299.81β = 112.56
c = 144.41γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-01
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Data collection, Database references, Derived calculations, Refinement description