6FO0 image
Entry Detail
PDB ID:
6FO0
EMDB ID:
Title:
CryoEM structure of bovine cytochrome bc1 in complex with the anti-malarial compound GSK932121
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2018-02-05
Release Date:
2018-02-28
Method Details:
Experimental Method:
Resolution:
4.10 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit 1, mitochondrial
Chain IDs:A (auth: N), K (auth: A)
Chain Length:480
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit 2, mitochondrial
Chain IDs:B (auth: O), L (auth: B)
Chain Length:453
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b
Chain IDs:C (auth: P), M (auth: C)
Chain Length:379
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome c1, heme protein, mitochondrial
Chain IDs:D (auth: Q), N (auth: D)
Chain Length:325
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit Rieske, mitochondrial
Chain IDs:E (auth: R), O (auth: E)
Chain Length:274
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit 7
Chain IDs:F (auth: S), P (auth: F)
Chain Length:111
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit 8
Chain IDs:G (auth: T), Q (auth: G)
Chain Length:82
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit 6, mitochondrial
Chain IDs:H (auth: U), R (auth: H)
Chain Length:91
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Chain I/V
Chain IDs:I (auth: V), S (auth: I)
Chain Length:17
Number of Molecules:2
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Cytochrome b-c1 complex subunit 9
Chain IDs:J (auth: W), T (auth: J)
Chain Length:64
Number of Molecules:2
Biological Source:Bos taurus
Primary Citation
X-ray and cryo-EM structures of inhibitor-bound cytochromebc1complexes for structure-based drug discovery.
IUCrJ 5 200 210 (2018)
PMID: 29765610 DOI: 10.1107/S2052252518001616

Abstact

Cytochrome bc1, a dimeric multi-subunit electron-transport protein embedded in the inner mitochondrial membrane, is a major drug target for the treatment and prevention of malaria and toxoplasmosis. Structural studies of cytochrome bc1 from mammalian homologues co-crystallized with lead compounds have underpinned structure-based drug design to develop compounds with higher potency and selectivity. However, owing to the limited amount of cytochrome bc1 that may be available from parasites, all efforts have been focused on homologous cytochrome bc1 complexes from mammalian species, which has resulted in the failure of some drug candidates owing to toxicity in the host. Crystallographic studies of the native parasite proteins are not feasible owing to limited availability of the proteins. Here, it is demonstrated that cytochrome bc1 is highly amenable to single-particle cryo-EM (which uses significantly less protein) by solving the apo and two inhibitor-bound structures to ∼4.1 Å resolution, revealing clear inhibitor density at the binding site. Therefore, cryo-EM is proposed as a viable alternative method for structure-based drug discovery using both host and parasite enzymes.

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Primary Citation of related structures