5A6C image
Deposition Date 2015-06-25
Release Date 2015-12-30
Last Version Date 2024-01-10
Entry Detail
PDB ID:
5A6C
Keywords:
Title:
Concomitant binding of Afadin to LGN and F-actin directs planar spindle orientation
Biological Source:
Source Organism:
HOMO SAPIENS (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.90 Å
R-Value Free:
0.25
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 3
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:G-PROTEIN-SIGNALING MODULATOR 2, AFADIN
Gene (Uniprot):AFDN, GPSM2
Chain IDs:A, B
Chain Length:374
Number of Molecules:2
Biological Source:HOMO SAPIENS
Ligand Molecules
Primary Citation
Concomitant Binding of Afadin to Lgn and F-Actin Directs Planar Spindle Orientation.
Nat.Struct.Mol.Biol. 23 155 ? (2016)
PMID: 26751642 DOI: 10.1038/NSMB.3152

Abstact

Polarized epithelia form by oriented cell divisions in which the mitotic spindle aligns parallel to the epithelial plane. To orient the mitotic spindle, cortical cues trigger the recruitment of NuMA-dynein-based motors, which pull on astral microtubules via the protein LGN. We demonstrate that the junctional protein Afadin is required for spindle orientation and correct epithelial morphogenesis of Caco-2 cysts. Molecularly, Afadin binds directly and concomitantly to F-actin and to LGN. We determined the crystallographic structure of human Afadin in complex with LGN and show that it resembles the LGN-NuMA complex. In mitosis, Afadin is necessary for cortical accumulation of LGN and NuMA above the spindle poles, in an F-actin-dependent manner. Collectively, our results depict Afadin as a molecular hub governing the enrichment of LGN and NuMA at the cortex. To our knowledge, Afadin is the first-described mechanical anchor between dynein and cortical F-actin.

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Primary Citation of related structures