6SRI image
Entry Detail
PDB ID:
6SRI
EMDB ID:
Keywords:
Title:
Structure of the Fanconi anaemia core complex
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2019-09-05
Release Date:
2019-11-06
Method Details:
Experimental Method:
Resolution:
4.20 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:JA (auth: 1)
Chain Length:109
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:KA (auth: 2)
Chain Length:62
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:MA (auth: 4)
Chain Length:71
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100: chain A,a; base region, proposed FANCC-FANC-E-FANCF: chain 3)
Chain IDs:A, M (auth: a), LA (auth: 3)
Chain Length:76
Number of Molecules:3
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:B, N (auth: b)
Chain Length:25
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:C, O (auth: c)
Chain Length:30
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:D, P (auth: d)
Chain Length:23
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:E, Q (auth: e)
Chain Length:9
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100: chain F,f; base region, proposed FANCC-FANC-E-FANCF: chain Z)
Chain IDs:F, R (auth: f), NA (auth: Z)
Chain Length:15
Number of Molecules:3
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:G, S (auth: g)
Chain Length:26
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:H, J, T (auth: h), V (auth: j)
Chain Length:17
Number of Molecules:4
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:I, U (auth: i)
Chain Length:37
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:K, W (auth: k)
Chain Length:21
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (central region, proposed FANCB-FAAP100)
Chain IDs:L, X (auth: l)
Chain Length:18
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (proposed FANCB)
Chain IDs:Y (auth: M), AA (auth: m)
Chain Length:120
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (proposed FAAP100)
Chain IDs:Z (auth: N), BA (auth: n)
Chain Length:43
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (top region, proposed FANCG)
Chain IDs:SA (auth: R)
Chain Length:285
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (top region, proposed FANCG)
Chain IDs:TA (auth: S)
Chain Length:145
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:base region, proposed FANCF
Chain IDs:PA (auth: T)
Chain Length:201
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:EA (auth: U)
Chain Length:227
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:FA (auth: V)
Chain Length:27
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:GA (auth: W)
Chain Length:20
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:HA (auth: X)
Chain Length:13
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (base region, proposed FANCC-FANC-E-FANCF)
Chain IDs:IA (auth: Y)
Chain Length:84
Number of Molecules:1
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (proposed FANCB)
Chain IDs:CA (auth: o), QA (auth: O)
Chain Length:279
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Unassigned secondary structure elements (proposed FAAP100)
Chain IDs:DA (auth: p), RA (auth: P)
Chain Length:276
Number of Molecules:2
Biological Source:Gallus gallus
Polymer Type:polypeptide(L)
Description:Fanconi anaemia protein FANCL
Chain IDs:OA (auth: q), UA (auth: Q)
Chain Length:373
Number of Molecules:2
Biological Source:Gallus gallus
Ligand Molecules
Primary Citation
Structure of the Fanconi anaemia monoubiquitin ligase complex.
Nature 575 234 237 (2019)
PMID: 31666700 DOI: 10.1038/s41586-019-1703-4

Abstact

The Fanconi anaemia (FA) pathway repairs DNA damage caused by endogenous and chemotherapy-induced DNA crosslinks, and responds to replication stress1,2. Genetic inactivation of this pathway by mutation of genes encoding FA complementation group (FANC) proteins impairs development, prevents blood production and promotes cancer1,3. The key molecular step in the FA pathway is the monoubiquitination of a pseudosymmetric heterodimer of FANCD2-FANCI4,5 by the FA core complex-a megadalton multiprotein E3 ubiquitin ligase6,7. Monoubiquitinated FANCD2 then recruits additional protein factors to remove the DNA crosslink or to stabilize the stalled replication fork. A molecular structure of the FA core complex would explain how it acts to maintain genome stability. Here we reconstituted an active, recombinant FA core complex, and used cryo-electron microscopy and mass spectrometry to determine its structure. The FA core complex comprises two central dimers of the FANCB and FA-associated protein of 100 kDa (FAAP100) subunits, flanked by two copies of the RING finger subunit, FANCL. These two heterotrimers act as a scaffold to assemble the remaining five subunits, resulting in an extended asymmetric structure. Destabilization of the scaffold would disrupt the entire complex, resulting in a non-functional FA pathway. Thus, the structure provides a mechanistic basis for the low numbers of patients with mutations in FANCB, FANCL and FAAP100. Despite a lack of sequence homology, FANCB and FAAP100 adopt similar structures. The two FANCL subunits are in different conformations at opposite ends of the complex, suggesting that each FANCL has a distinct role. This structural and functional asymmetry of dimeric RING finger domains may be a general feature of E3 ligases. The cryo-electron microscopy structure of the FA core complex provides a foundation for a detailed understanding of its E3 ubiquitin ligase activity and DNA interstrand crosslink repair.

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Primary Citation of related structures