4G4S

Structure of Proteasome-Pba1-Pba2 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structure of a Proteasome Pba1-Pba2 Complex: IMPLICATIONS FOR PROTEASOME ASSEMBLY, ACTIVATION, AND BIOLOGICAL FUNCTION.

Stadtmueller, B.M.Kish-Trier, E.Ferrell, K.Petersen, C.N.Robinson, H.Myszka, D.G.Eckert, D.M.Formosa, T.Hill, C.P.

(2012) J Biol Chem 287: 37371-37382

  • DOI: 10.1074/jbc.M112.367003
  • Primary Citation of Related Structures:  
    4G4S

  • PubMed Abstract: 
  • The 20S proteasome is an essential, 28-subunit protease that sequesters proteolytic sites within a central chamber, thereby repressing substrate degradation until proteasome activators open the entrance/exit gate. Two established activators, Blm10 and PAN/19S, induce gate opening by binding to the pockets between proteasome α-subunits using C-terminal HbYX (hydrophobic-tyrosine-any residue) motifs ...

    The 20S proteasome is an essential, 28-subunit protease that sequesters proteolytic sites within a central chamber, thereby repressing substrate degradation until proteasome activators open the entrance/exit gate. Two established activators, Blm10 and PAN/19S, induce gate opening by binding to the pockets between proteasome α-subunits using C-terminal HbYX (hydrophobic-tyrosine-any residue) motifs. Equivalent HbYX motifs have been identified in Pba1 and Pba2, which function in proteasome assembly. Here, we demonstrate that Pba1-Pba2 proteins form a stable heterodimer that utilizes its HbYX motifs to bind mature 20S proteasomes in vitro and that the Pba1-Pba2 HbYX motifs are important for a physiological function of proteasomes, the maintenance of mitochondrial function. Other factors that contribute to proteasome assembly or function also act in the maintenance of mitochondrial function and display complex genetic interactions with one another, possibly revealing an unexpected pathway of mitochondrial regulation involving the Pba1-Pba2 proteasome interaction. Our determination of a proteasome Pba1-Pba2 crystal structure reveals a Pba1 HbYX interaction that is superimposable with those of known activators, a Pba2 HbYX interaction that is different from those reported previously, and a gate structure that is disrupted but not sufficiently open to allow entry of even small peptides. These findings extend understanding of proteasome interactions with HbYX motifs and suggest multiple roles for Pba1-Pba2 interactions throughout proteasome assembly and function.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, Utah 84112-5650, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C7-alphaA252Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SCL1PRC2PRS2YGL011C
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component Y7B250Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE8PRS4YML092C
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component Y13C258Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE9PRS5YGR135W
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE6D254Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE6YOL038W
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PUP2E261Saccharomyces cerevisiae S288CMutation(s): 1 
Gene Names: PUP2DOA5YGR253CG9155
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE5F235Saccharomyces cerevisiae S288CMutation(s): 1 
Gene Names: PRE5YMR314WYM9924.06
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C1G288Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE10PRC1PRS1YOR362CO6650
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE3H196Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE3YJL001WJ1407
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PUP1I232Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PUP1YOR157C
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PUP3J205Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PUP3YER094C
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C11K198Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE1YER012W
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE2L212Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE2DOA3PRG1YPR103WP8283.10
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C5M222Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE7PRS3PTS1YBL041WYBL0407
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE4N233Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PRE4YFR050C
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
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome chaperone 1O276Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PBA1POC1YLR199C
UniProt
Find proteins for Q05778 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q05778 
Go to UniProtKB:  Q05778
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05778
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome assembly chaperone 2P269Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: ADD66PBA2POC2YKL206C
UniProt
Find proteins for P36040 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P36040 
Go to UniProtKB:  P36040
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36040
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LDZ
Query on LDZ

Download Ideal Coordinates CCD File 
V [auth L]N-[(benzyloxy)carbonyl]-L-leucyl-N-[(2S)-4-methyl-1-oxopentan-2-yl]-L-leucinamide
C26 H41 N3 O5
TZYWCYJVHRLUCT-VABKMULXSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
Q [auth A],
R [auth H],
S [auth I],
T [auth J],
U [auth J],
Q [auth A],
R [auth H],
S [auth I],
T [auth J],
U [auth J],
W [auth L],
X [auth M],
Y [auth M]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.409α = 90
b = 182.513β = 90
c = 388.782γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-05
    Type: Initial release
  • Version 1.1: 2012-09-12
    Changes: Database references
  • Version 1.2: 2012-11-14
    Changes: Database references
  • Version 1.3: 2013-04-10
    Changes: Non-polymer description