5dtb

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Crystal structure of the Drosophila CG3822 KaiR1D ligand binding domain complex with glutamate

Structural highlights

5dtb is a 2 chain structure with sequence from Drosophila melanogaster. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.843Å
Ligands:GLU, GOL, NA
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q9VDH5_DROME

Publication Abstract from PubMed

Phylogenetic analysis reveals AMPA, kainate, and NMDA receptor families in insect genomes, suggesting conserved functional properties corresponding to their vertebrate counterparts. However, heterologous expression of the Drosophila kainate receptor DKaiR1D and the AMPA receptor DGluR1A revealed novel ligand selectivity at odds with the classification used for vertebrate glutamate receptor ion channels (iGluRs). DKaiR1D forms a rapidly activating and desensitizing receptor that is inhibited by both NMDA and the NMDA receptor antagonist AP5; crystallization of the KaiR1D ligand-binding domain reveals that these ligands stabilize open cleft conformations, explaining their action as antagonists. Surprisingly, the AMPA receptor DGluR1A shows weak activation by its namesake agonist AMPA and also by quisqualate. Crystallization of the DGluR1A ligand-binding domain reveals amino acid exchanges that interfere with binding of these ligands. The unexpected ligand-binding profiles of insect iGluRs allows classical tools to be used in novel approaches for the study of synaptic regulation. VIDEO ABSTRACT.

Novel Functional Properties of Drosophila CNS Glutamate Receptors.,Li Y, Dharkar P, Han TH, Serpe M, Lee CH, Mayer ML Neuron. 2016 Dec 7;92(5):1036-1048. doi: 10.1016/j.neuron.2016.10.058. Epub 2016 , Nov 23. PMID:27889096[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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References

  1. Li Y, Dharkar P, Han TH, Serpe M, Lee CH, Mayer ML. Novel Functional Properties of Drosophila CNS Glutamate Receptors. Neuron. 2016 Dec 7;92(5):1036-1048. doi: 10.1016/j.neuron.2016.10.058. Epub 2016 , Nov 23. PMID:27889096 doi:http://dx.doi.org/10.1016/j.neuron.2016.10.058

Contents


PDB ID 5dtb

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