8DHB image
Deposition Date 2022-06-25
Release Date 2022-09-28
Last Version Date 2024-10-09
Entry Detail
PDB ID:
8DHB
Title:
Active FLCN GAP complex
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.53 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Ras-related GTP-binding protein C
Gene (Uniprot):RRAGC
Chain IDs:A
Chain Length:400
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Ras-related GTP-binding protein A
Gene (Uniprot):RRAGA
Chain IDs:B
Chain Length:336
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Ragulator complex protein LAMTOR1
Gene (Uniprot):LAMTOR1
Chain IDs:C
Chain Length:166
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Ragulator complex protein LAMTOR2
Gene (Uniprot):LAMTOR2
Chain IDs:D
Chain Length:127
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Ragulator complex protein LAMTOR3
Gene (Uniprot):LAMTOR3
Chain IDs:E
Chain Length:124
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Ragulator complex protein LAMTOR4
Gene (Uniprot):LAMTOR4
Chain IDs:F
Chain Length:99
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Ragulator complex protein LAMTOR5
Chain IDs:G
Chain Length:173
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Glutathione S-transferase class-mu 26 kDa isozyme,Sodium-coupled neutral amino acid transporter 9 chimera
Gene (Uniprot):SLC38A9
Chain IDs:H
Chain Length:356
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Folliculin-interacting protein 2
Gene (Uniprot):FNIP2
Chain IDs:I
Chain Length:1351
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Folliculin
Gene (Uniprot):FLCN
Chain IDs:J
Chain Length:622
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Structural basis for FLCN RagC GAP activation in MiT-TFE substrate-selective mTORC1 regulation.
Sci Adv 8 eadd2926 eadd2926 (2022)
PMID: 36103527 DOI: 10.1126/sciadv.add2926

Abstact

The mechanistic target of rapamycin complex 1 (mTORC1) regulates cell growth and catabolism in response to nutrients through phosphorylation of key substrates. The tumor suppressor folliculin (FLCN) is a RagC/D guanosine triphosphatase (GTPase)-activating protein (GAP) that regulates mTORC1 phosphorylation of MiT-TFE transcription factors, controlling lysosome biogenesis and autophagy. We determined the cryo-electron microscopy structure of the active FLCN complex (AFC) containing FLCN, FNIP2, the N-terminal tail of SLC38A9, the RagAGDP:RagCGDP.BeFx- GTPase dimer, and the Ragulator scaffold. Relative to the inactive lysosomal FLCN complex structure, FLCN reorients by 90°, breaks contact with RagA, and makes previously unseen contacts with RagC that position its Arg164 finger for catalysis. Disruption of the AFC-specific interfaces of FLCN and FNIP2 with RagC eliminated GAP activity and led to nuclear retention of TFE3, with no effect on mTORC1 substrates S6K or 4E-BP1. The structure provides a basis for regulation of an mTORC1 substrate-specific pathway and a roadmap to discover MiT-TFE family selective mTORC1 antagonists.

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Primary Citation of related structures