5WTQ

Crystal structure of human proteasome-assembling chaperone PAC4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 

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This is version 1.1 of the entry. See complete history


Literature

Crystal structure of human proteasome assembly chaperone PAC4 involved in proteasome formation

Kurimoto, E.Satoh, T.Ito, Y.Ishihara, E.Okamoto, K.Yagi-Utsumi, M.Tanaka, K.Kato, K.

(2017) Protein Sci 26: 1080-1085

  • DOI: 10.1002/pro.3153
  • Primary Citation of Related Structures:  
    5WTQ

  • PubMed Abstract: 
  • The 26S proteasome is a large protein complex, responsible for degradation of ubiquinated proteins in eukaryotic cells. Eukaryotic proteasome formation is a highly ordered process that is assisted by several assembly chaperones. The assembly of its catalytic 20S core particle depends on at least five proteasome-specific chaperones, i ...

    The 26S proteasome is a large protein complex, responsible for degradation of ubiquinated proteins in eukaryotic cells. Eukaryotic proteasome formation is a highly ordered process that is assisted by several assembly chaperones. The assembly of its catalytic 20S core particle depends on at least five proteasome-specific chaperones, i.e., proteasome-assembling chaperons 1-4 (PAC1-4) and proteasome maturation protein (POMP). The orthologues of yeast assembly chaperones have been structurally characterized, whereas most mammalian assembly chaperones are not. In the present study, we determined a crystal structure of human PAC4 at 1.90-Å resolution. Our crystallographic data identify a hydrophobic surface that is surrounded by charged residues. The hydrophobic surface is complementary to that of its binding partner, PAC3. The surface also exhibits charge complementarity with the proteasomal α4-5 subunits. This will provide insights into human proteasome-assembling chaperones as potential anticancer drug targets.


    Organizational Affiliation

    Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi, 444-8787, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome assembly chaperone 4A, B, C, D126Homo sapiensMutation(s): 1 
Gene Names: PSMG4C6orf86PAC4
UniProt & NIH Common Fund Data Resources
Find proteins for Q5JS54 (Homo sapiens)
Explore Q5JS54 
Go to UniProtKB:  Q5JS54
PHAROS:  Q5JS54
GTEx:  ENSG00000180822 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5JS54
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 
  • Space Group: F 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.548α = 90
b = 152.779β = 90
c = 212.911γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JSPS KAKENHIJapan15H02491, 25102008

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-22
    Type: Initial release
  • Version 1.1: 2017-05-24
    Changes: Database references