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Journal ArticleDOI

Molecular signatures of G-protein-coupled receptors.

TLDR
Through a systematic analysis of high-resolution GPCR structures, a conserved network of non-covalent contacts that defines the G PCR fold is uncovered and characteristic features of ligand binding and conformational changes during receptor activation are revealed.
Abstract
G-protein-coupled receptors (GPCRs) are physiologically important membrane proteins that sense signalling molecules such as hormones and neurotransmitters, and are the targets of several prescribed drugs. Recent exciting developments are providing unprecedented insights into the structure and function of several medically important GPCRs. Here, through a systematic analysis of high-resolution GPCR structures, we uncover a conserved network of non-covalent contacts that defines the GPCR fold. Furthermore, our comparative analysis reveals characteristic features of ligand binding and conformational changes during receptor activation. A holistic understanding that integrates molecular and systems biology of GPCRs holds promise for new therapeutics and personalized medicine.

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Journal ArticleDOI

GPCRDB: an information system for G protein-coupled receptors.

TL;DR: New features in the fifth major GPCRdb release are highlighted, including G PCR crystal structure browsing, superposition and display of ligand interactions, direct deposition by users of point mutations and their effects on ligand binding.
Journal ArticleDOI

Microbial and animal rhodopsins: structures, functions, and molecular mechanisms.

TL;DR: Rhodopsins found in Eukaryotes, Bacteria, and Archaea consist of opsin apoproteins and a covalently linked retinal which is employed to absorb photons for energy conversion or the initiation of intra- or intercellular signaling.
Journal ArticleDOI

The Molecular Basis of G Protein-Coupled Receptor Activation.

TL;DR: Molecular understanding of the allosteric coupling between ligand binding and G protein or arrestin interaction is emerging from structures of several GPCRs crystallized in inactive and active states, spectroscopic data, and computer simulations.
References
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Journal ArticleDOI

Crystal Structure of Rhodopsin: A G Protein-Coupled Receptor

TL;DR: This article determined the structure of rhodopsin from diffraction data extending to 2.8 angstroms resolution and found that the highly organized structure in the extracellular region, including a conserved disulfide bridge, forms a basis for the arrangement of the sevenhelix transmembrane motif.
Journal ArticleDOI

High-Resolution Crystal Structure of an Engineered Human β2-Adrenergic G Protein–Coupled Receptor

TL;DR: Although the location of carazolol in the β2-adrenergic receptor is very similar to that of retinal in rhodopsin, structural differences in the ligand-binding site and other regions highlight the challenges in using rhodopin as a template model for this large receptor family.
Journal ArticleDOI

The G-Protein-Coupled Receptors in the Human Genome Form Five Main Families : Phylogenetic Analysis, Paralogon Groups, and Fingerprints

TL;DR: This study represents the first overall map of the GPCR sequences in a single mammalian genome and shows several common structural features indicating that the human GPCRs in the GRAFS families share a common ancestor.
Book ChapterDOI

[19] Integrated methods for the construction of three-dimensional models and computational probing of structure-function relations in G protein-coupled receptors

TL;DR: This chapter discusses the integrated methods for the construction of three-dimensional models and computational probing of structure–function relations in G protein-coupled receptors (GPCR) and expects increased rate of success achieved by molecular modeling and computational simulation methods in providing structural insights relevant to the functions of biological molecules.
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