4LTC

Crystal structure of yeast 20S proteasome in complex with enone carmaphycin analogue 6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Enzyme inhibition by hydroamination: design and mechanism of a hybrid carmaphycin-syringolin enone proteasome inhibitor.

Trivella, D.B.Pereira, A.R.Stein, M.L.Kasai, Y.Byrum, T.Valeriote, F.A.Tantillo, D.J.Groll, M.Gerwick, W.H.Moore, B.S.

(2014) Chem.Biol. 21: 782-791

  • DOI: 10.1016/j.chembiol.2014.04.010
  • Primary Citation of Related Structures:  4HNP, 4HRC, 4HRD

  • PubMed Abstract: 
  • Hydroamination reactions involving the addition of an amine to an inactivated alkene are entropically prohibited and require strong chemical catalysts. While this synthetic process is efficient at generating substituted amines, there is no equivalent ...

    Hydroamination reactions involving the addition of an amine to an inactivated alkene are entropically prohibited and require strong chemical catalysts. While this synthetic process is efficient at generating substituted amines, there is no equivalent in small molecule-mediated enzyme inhibition. We report an unusual mechanism of proteasome inhibition that involves a hydroamination reaction of alkene derivatives of the epoxyketone natural product carmaphycin. We show that the carmaphycin enone first forms a hemiketal intermediate with the catalytic Thr1 residue of the proteasome before cyclization by an unanticipated intramolecular alkene hydroamination reaction, resulting in a stable six-membered morpholine ring. The carmaphycin enone electrophile, which does not undergo a 1,4-Michael addition as previously observed with vinyl sulfone and α,β-unsaturated amide-based inhibitors, is partially reversible and gives insight into the design of proteasome inhibitors for cancer chemotherapy.


    Organizational Affiliation

    Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA 92093-0212, USA; Institute of Chemistry, University of Campinas, Campinas SP 13083-970, Brazil; Brazilian Biosciences National Laboratory, National Center for Research in Energy and Materials, Campinas SP 13083-970, Brazil.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit alpha type-2
A, O
250Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE8 (PRS4)
EC: 3.4.25.1
Find proteins for P23639 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P23639
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit alpha type-3
B, P
258Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE9 (PRS5)
EC: 3.4.25.1
Find proteins for P23638 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P23638
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit alpha type-4
C, Q
254Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE6
EC: 3.4.25.1
Find proteins for P40303 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P40303
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit alpha type-5
D, R
260Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PUP2 (DOA5)
EC: 3.4.25.1
Find proteins for P32379 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P32379
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit alpha type-6
E, S
234Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE5
EC: 3.4.25.1
Find proteins for P40302 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P40302
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Probable proteasome subunit alpha type-7
F, T
287Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE10 (PRC1, PRS1)
EC: 3.4.25.1
Find proteins for P21242 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P21242
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit alpha type-1
G, U
252Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: SCL1 (PRC2, PRS2)
EC: 3.4.25.1
Find proteins for P21243 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P21243
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-2
H, V
232Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PUP1
EC: 3.4.25.1
Find proteins for P25043 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P25043
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-3
I, W
205Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PUP3
EC: 3.4.25.1
Find proteins for P25451 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P25451
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-4
J, X
198Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE1
EC: 3.4.25.1
Find proteins for P22141 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P22141
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-5
K, Y
212Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE2 (DOA3, PRG1)
EC: 3.4.25.1
Find proteins for P30656 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P30656
Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-6
L, Z
222Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE7 (PRS3, PTS1)
EC: 3.4.25.1
Find proteins for P23724 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P23724
Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-7
M, a
233Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE4
EC: 3.4.25.1
Find proteins for P30657 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P30657
Entity ID: 14
MoleculeChainsSequence LengthOrganismDetails
Proteasome subunit beta type-1
N, b
196Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PRE3
EC: 3.4.25.1
Find proteins for P38624 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P38624
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EC6
Query on EC6

Download SDF File 
Download CCD File 
K, Y
N-hexanoyl-L-valyl-N~1~-[(4S,5S,6R)-5-hydroxy-2,6-dimethyloctan-4-yl]-N~5~,N~5~-dimethyl-L-glutamamide
Double bound form of enone carmaphycin analogue 6, (S)-N1-((S,Z)-2,6-dimethyl-5-oxooct-6-en-4-yl)-2-((S)-2-hexanamido-3-methylbutanamido)-N5,N5-dimethylpentanediamide
C28 H54 N4 O5
BFKSFYOCNVYLSG-DGTHGUPJSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_001161 (EC6)
Query on PRD_001161
K,YN-HEXANOYL-L-VALYL-N~1~-[(4S,5S,6R)-5-HYDROXY-2,6-DIMETHYLOCTAN-4-YL]-N~5~,N~5~-DIMETHYL-L-GLUTAMAMIDEPeptide-like / Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.204 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 135.170α = 90.00
b = 300.230β = 112.79
c = 144.380γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
REFMACrefinement
CNSphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-02
    Type: Initial release