5CMP

human FLRT3 LRR domain

Summary for 5CMP

• Entry DOI: 10.2210/pdb5cmp/pdb
• Related: 5CMN
• Descriptor: Leucine-rich repeat transmembrane protein FLRT3, 2-acetamido-2-deoxy-beta-D-glucopyranose (3 entities in total)
• Functional Keywords: lrr repeats, cell adhesion
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 4
• Total formula weight: 152733.71

Authors

Lu, Y.,Salzman, G.,Arac, D. (deposition date: 2015-07-17, release date: 2015-08-12, Last modification date: 2024-10-30)

Primary citation

Lu, Y.C.,Nazarko, O.V.,Sando, R.,Salzman, G.S.,Sudhof, T.C.,Arac, D.
Structural Basis of Latrophilin-FLRT-UNC5 Interaction in Cell Adhesion.
Structure, 23:1678-1691, 2015

PubMed Abstract: Fibronectin leucine-rich repeat transmembrane proteins (FLRTs) are cell-adhesion molecules with emerging functions in cortical development and synapse formation. Their extracellular regions interact with latrophilins (LPHNs) to mediate synapse development, and with Uncoordinated-5 (UNC5)/netrin receptors to control the migration of neurons in the developing cortex. Here, we present the crystal structures of FLRT3 in isolation and in complex with LPHN3. The LPHN3/FLRT3 structure reveals that LPHN3 binds to FLRT3 at a site distinct from UNC5. Structure-based mutations specifically disrupt LPHN3/FLRT3 binding, but do not disturb their interactions with other proteins or their cell-membrane localization. Thus, they can be used as molecular tools to dissect the functions of FLRTs and LPHNs in vivo. Our results suggest that UNC5 and LPHN3 can simultaneously bind to FLRT3, forming a trimeric complex, and that FLRT3 may form transsynaptic complexes with both LPHN3 and UNC5. These findings provide molecular insights for understanding the role of cell-adhesion proteins in synapse function.

PubMed: 26235030
DOI: 10.1016/j.str.2015.06.024

Experimental method

X-RAY DIFFRACTION (2.601 Å)