5A0Q

Cryo-EM reveals the conformation of a substrate analogue in the human 20S proteasome core


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.1 of the entry. See complete history


Literature

Cryo-Em Reveals the Conformation of a Substrate Analogue in the Human 20S Proteasome Core.

Da Fonseca, P.C.A.Morris, E.P.

(2015) Nat Commun 6: 7573

  • DOI: 10.1038/ncomms8573
  • Primary Citation of Related Structures:  
    5A0Q

  • PubMed Abstract: 
  • The proteasome is a highly regulated protease complex fundamental for cell homeostasis and controlled cell cycle progression. It functions by removing a wide range of specifically tagged proteins, including key cellular regulators. Here we present the structure of the human 20S proteasome core bound to a substrate analogue inhibitor molecule, determined by electron cryo-microscopy (cryo-EM) and single-particle analysis at a resolution of around 3 ...

    The proteasome is a highly regulated protease complex fundamental for cell homeostasis and controlled cell cycle progression. It functions by removing a wide range of specifically tagged proteins, including key cellular regulators. Here we present the structure of the human 20S proteasome core bound to a substrate analogue inhibitor molecule, determined by electron cryo-microscopy (cryo-EM) and single-particle analysis at a resolution of around 3.5 Å. Our map allows the building of protein coordinates as well as defining the location and conformation of the inhibitor at the different active sites. These results open new prospects to tackle the proteasome functional mechanisms. Moreover, they also further demonstrate that cryo-EM is emerging as a realistic approach for general structural studies of protein-ligand interactions.


    Organizational Affiliation

    Division of Structural Biology, The Institute of Cancer Research, London SW3 3RP, UK.



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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEASOME SUBUNIT ALPHA TYPE-6 AO246Homo sapiensMutation(s): 0 
Gene Names: PSMA6PROS27
EC: 3.4.25.1
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Entity ID: 2
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PROTEASOME SUBUNIT ALPHA TYPE-2 BP234Homo sapiensMutation(s): 0 
Gene Names: PSMA2HC3PSC3
EC: 3.4.25.1
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Entity ID: 3
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PROTEASOME SUBUNIT ALPHA TYPE-4 CQ261Homo sapiensMutation(s): 0 
Gene Names: PSMA4HC9PSC9
EC: 3.4.25.1
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Entity ID: 4
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PROTEASOME SUBUNIT ALPHA TYPE-7 DR248Homo sapiensMutation(s): 0 
Gene Names: PSMA7HSPC
EC: 3.4.25.1
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Entity ID: 5
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PROTEASOME SUBUNIT ALPHA TYPE-5 ES241Homo sapiensMutation(s): 0 
Gene Names: PSMA5
EC: 3.4.25.1
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Entity ID: 6
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PROTEASOME SUBUNIT ALPHA TYPE-1 FT263Homo sapiensMutation(s): 0 
Gene Names: PSMA1HC2NUPROS30PSC2
EC: 3.4.25.1
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Entity ID: 7
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PROTEASOME SUBUNIT ALPHA TYPE-3 GU255Homo sapiensMutation(s): 0 
Gene Names: PSMA3HC8PSC8
EC: 3.4.25.1
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Entity ID: 8
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PROTEASOME SUBUNIT BETA TYPE-6 HV205Homo sapiensMutation(s): 0 
Gene Names: PSMB6LMPYY
EC: 3.4.25.1
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PROTEASOME SUBUNIT BETA TYPE-7 IW234Homo sapiensMutation(s): 0 
Gene Names: PSMB7Z
EC: 3.4.25.1
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PROTEASOME SUBUNIT BETA TYPE-3 JX204Homo sapiensMutation(s): 0 
Gene Names: PSMB3
EC: 3.4.25.1
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Entity ID: 11
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PROTEASOME SUBUNIT BETA TYPE-2 KY201Homo sapiensMutation(s): 0 
Gene Names: PSMB2
EC: 3.4.25.1
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Entity ID: 12
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PROTEASOME SUBUNIT BETA TYPE-5 LZ204Homo sapiensMutation(s): 0 
Gene Names: PSMB5LMPXMB1X
EC: 3.4.25.1
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Entity ID: 13
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PROTEASOME SUBUNIT BETA TYPE-1 Ma213Homo sapiensMutation(s): 0 
Gene Names: PSMB1PSC5
EC: 3.4.25.1
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Entity ID: 14
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PROTEASOME SUBUNIT BETA TYPE-4 Nb219Homo sapiensMutation(s): 0 
Gene Names: PSMB4PROS26
EC: 3.4.25.1
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-30
    Type: Initial release
  • Version 1.1: 2017-08-02
    Changes: Data collection