5MP9 image
Entry Detail
PDB ID:
5MP9
EMDB ID:
Keywords:
Title:
26S proteasome in presence of ATP (s1)
Biological Source:
PDB Version:
Deposition Date:
2016-12-16
Release Date:
2017-03-08
Method Details:
Experimental Method:
Resolution:
4.10 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:26S protease regulatory subunit 7 homolog
Chain IDs:CA (auth: H)
Chain Length:215
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:26S protease regulatory subunit 4 homolog
Chain IDs:DA (auth: I)
Chain Length:437
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:26S protease regulatory subunit 8 homolog
Chain IDs:HA (auth: J)
Chain Length:205
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:26S protease regulatory subunit 6B homolog
Chain IDs:EA (auth: K)
Chain Length:428
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:26S protease subunit RPT4
Chain IDs:FA (auth: L)
Chain Length:287
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:26S protease regulatory subunit 6A
Chain IDs:GA (auth: M)
Chain Length:434
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit alpha type-1
Chain IDs:A (auth: a), O (auth: A)
Chain Length:252
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit alpha type-2
Chain IDs:B (auth: b), P (auth: B)
Chain Length:250
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit alpha type-3
Chain IDs:C (auth: c), Q (auth: C)
Chain Length:258
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit alpha type-4
Chain IDs:D (auth: d), R (auth: D)
Chain Length:254
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit alpha type-5
Chain IDs:E (auth: e), S (auth: E)
Chain Length:260
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit alpha type-6
Chain IDs:F (auth: f), T (auth: F)
Chain Length:234
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Probable proteasome subunit alpha type-7
Chain IDs:G (auth: g), U (auth: G)
Chain Length:288
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-1
Chain IDs:H (auth: h), V (auth: 1)
Chain Length:215
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-2
Chain IDs:I (auth: i), W (auth: 2)
Chain Length:261
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-3
Chain IDs:J (auth: j), X (auth: 3)
Chain Length:205
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-4
Chain IDs:K (auth: k), Y (auth: 4)
Chain Length:198
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-5
Chain IDs:L (auth: l), Z (auth: 5)
Chain Length:287
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-6
Chain IDs:M (auth: m), AA (auth: 6)
Chain Length:241
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Proteasome subunit beta type-7
Chain IDs:N (auth: n), BA (auth: 7)
Chain Length:266
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Primary Citation
Structural insights into the functional cycle of the ATPase module of the 26S proteasome.
Proc. Natl. Acad. Sci. U.S.A. 114 1305 1310 (2017)
PMID: 28115689 DOI: 10.1073/pnas.1621129114

Abstact

In eukaryotic cells, the ubiquitin-proteasome system (UPS) is responsible for the regulated degradation of intracellular proteins. The 26S holocomplex comprises the core particle (CP), where proteolysis takes place, and one or two regulatory particles (RPs). The base of the RP is formed by a heterohexameric AAA+ ATPase module, which unfolds and translocates substrates into the CP. Applying single-particle cryo-electron microscopy (cryo-EM) and image classification to samples in the presence of different nucleotides and nucleotide analogs, we were able to observe four distinct conformational states (s1 to s4). The resolution of the four conformers allowed for the construction of atomic models of the AAA+ ATPase module as it progresses through the functional cycle. In a hitherto unobserved state (s4), the gate controlling access to the CP is open. The structures described in this study allow us to put forward a model for the 26S functional cycle driven by ATP hydrolysis.

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