ISDA

Deposition Date 2019-12-11

Release Date 2020-01-15

Last Version Date 2024-11-13

Entry Detail

PDB ID:

6TOT

Keywords:

MEMBRANE PROTEIN

Title:

Crystal structure of the Orexin-1 receptor in complex with lemborexant

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Spodoptera frugiperda

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.22 Å

R-Value Free:

0.23

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Orexin receptor type 1
Gene (Uniprot):HCRTR1
Mutations:E46A I85L V95A R162L N194A L198A Y211A L304V C339A C375W C376W
Chain IDs:A, B
Chain Length:336
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:O43613 Pfam ID:PF00001

Ligand Molecules

NRK

PG4

PGW

SO4

SOG

Primary Citation

Comparison of Orexin 1 and Orexin 2 Ligand Binding Modes Using X-ray Crystallography and Computational Analysis.

Rappas, M, Ali, A.A.E, Bennett, K.A, Brown, J.D, Bucknell, S.J, Congreve, M, Cooke, R.M, Cseke, G, de Graaf, C, Dore, A.S, Errey, J.C, Jazayeri, A, Marshall, F.H, Mason, J.S, Mould, R, Patel, J.C, Tehan, B.G, Weir, M, Christopher, J.A.Show

J.Med.Chem. 63 1528 1543 (2020)

PMID: 31860301 DOI: 10.1021/acs.jmedchem.9b01787

Abstact

The orexin system, which consists of the two G protein-coupled receptors OX1 and OX2, activated by the neuropeptides OX-A and OX-B, is firmly established as a key regulator of behavioral arousal, sleep, and wakefulness and has been an area of intense research effort over the past two decades. X-ray structures of the receptors in complex with 10 new antagonist ligands from diverse chemotypes are presented, which complement the existing structural information for the system and highlight the critical importance of lipophilic hotspots and water molecules for these peptidergic GPCR targets. Learnings from the structural information regarding the utility of pharmacophore models and how selectivity between OX1 and OX2 can be achieved are discussed.

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Primary Citation of related structures