Etude Structurale Des Cassures D'hélices Et
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Peropsin, a Novel Visual Pigment-Like Protein Located in the Apical Microvilli of the Retinal Pigment Epithelium
Proc. Natl. Acad. Sci. USA Vol. 94, pp. 9893–9898, September 1997 Neurobiology Peropsin, a novel visual pigment-like protein located in the apical microvilli of the retinal pigment epithelium HUI SUN*, DEBRA J. GILBERT†,NEAL G. COPELAND†,NANCY A. JENKINS†, AND JEREMY NATHANS*‡§¶i *Department of Molecular Biology and Genetics, §Department of Neuroscience, ¶Department of Ophthalmology, ‡Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205; and †Mammalian Genetics Laboratory, Advanced BioScience Laboratories Basic Research Program, National Cancer Institute–Frederick Cancer Research and Development Center, Frederick, MD 21702 Contributed by Jeremy Nathans, June 19, 1997 ABSTRACT A visual pigment-like protein, referred to as bovine RPE binds to all-trans but not 11-cis retinal and absorbs peropsin, has been identified by large-scale sequencing of both visible and ultraviolet light (8, 9). The sequences of cDNAs derived from human ocular tissues. The corresponding retinochrome and RGR opsin form a distinct and highly mRNA was found only in the eye, where it is localized to the divergent branch within the visual pigment family (6, 10). retinal pigment epithelium (RPE). Peropsin immunoreactiv- Whether retinochrome and RGR act as signal-transducing ity, visualized by light and electron microscopy, localizes the light receptors, participate in the visual cycle as retinal isomer- protein to the apical face of the RPE, and most prominently ases, or function in both capacities, is not known. to the microvilli that surround the photoreceptor outer seg- In the vertebrate eye, the RPE lies adjacent to the photo- ments. These observations suggest that peropsin may play a receptor cells and performs a number of functions critical for role in RPE physiology either by detecting light directly or by the viability and activity of the retina (11). -
The G Protein-Coupled Receptor Subset of the Dog Genome Is More Similar
BMC Genomics BioMed Central Research article Open Access The G protein-coupled receptor subset of the dog genome is more similar to that in humans than rodents Tatjana Haitina1, Robert Fredriksson1, Steven M Foord2, Helgi B Schiöth*1 and David E Gloriam*2 Address: 1Department of Neuroscience, Functional Pharmacology, Uppsala University, BMC, Box 593, 751 24, Uppsala, Sweden and 2GlaxoSmithKline Pharmaceuticals, New Frontiers Science Park, 3rd Avenue, Harlow CM19 5AW, UK Email: Tatjana Haitina - [email protected]; Robert Fredriksson - [email protected]; Steven M Foord - [email protected]; Helgi B Schiöth* - [email protected]; David E Gloriam* - [email protected] * Corresponding authors Published: 15 January 2009 Received: 20 August 2008 Accepted: 15 January 2009 BMC Genomics 2009, 10:24 doi:10.1186/1471-2164-10-24 This article is available from: http://www.biomedcentral.com/1471-2164/10/24 © 2009 Haitina et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Background: The dog is an important model organism and it is considered to be closer to humans than rodents regarding metabolism and responses to drugs. The close relationship between humans and dogs over many centuries has lead to the diversity of the canine species, important genetic discoveries and an appreciation of the effects of old age in another species. The superfamily of G protein-coupled receptors (GPCRs) is one of the largest gene families in most mammals and the most exploited in terms of drug discovery. -
Database Tool the Systematic Annotation of the Three Main GPCR
Database, Vol. 2010, Article ID baq018, doi:10.1093/database/baq018 ............................................................................................................................................................................................................................................................................................. Database tool The systematic annotation of the three main Downloaded from https://academic.oup.com/database/article-abstract/doi/10.1093/database/baq018/406672 by guest on 15 January 2019 GPCR families in Reactome Bijay Jassal1, Steven Jupe1, Michael Caudy2, Ewan Birney1, Lincoln Stein2, Henning Hermjakob1 and Peter D’Eustachio3,* 1European Bioinformatics Institute, Hinxton, Cambridge, CB10 1SD, UK, 2Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada and 3New York University School of Medicine, New York, NY 10016, USA *Corresponding author: Tel: +212 263 5779; Fax: +212 263 8166; Email: [email protected] Submitted 14 April 2010; Revised 14 June 2010; Accepted 13 July 2010 ............................................................................................................................................................................................................................................................................................. Reactome is an open-source, freely available database of human biological pathways and processes. A major goal of our work is to provide an integrated view of cellular signalling processes that spans from ligand–receptor -
The Genetics of Normal and Defective Color Vision
Vision Research xxx (2011) xxx–xxx Contents lists available at ScienceDirect Vision Research journal homepage: www.elsevier.com/locate/visres Review The genetics of normal and defective color vision Jay Neitz ⇑, Maureen Neitz University of Washington, Dept. of Ophthalmology, Seattle, WA 98195, United States article info a b s t r a c t Article history: The contributions of genetics research to the science of normal and defective color vision over the previ- Received 3 July 2010 ous few decades are reviewed emphasizing the developments in the 25 years since the last anniversary Received in revised form 25 November 2010 issue of Vision Research. Understanding of the biology underlying color vision has been vaulted forward Available online xxxx through the application of the tools of molecular genetics. For all their complexity, the biological pro- cesses responsible for color vision are more accessible than for many other neural systems. This is partly Keywords: because of the wealth of genetic variations that affect color perception, both within and across species, Color vision and because components of the color vision system lend themselves to genetic manipulation. Mutations Cone photoreceptor and rearrangements in the genes encoding the long, middle, and short wavelength sensitive cone pig- Colorblindness Cone mosaic ments are responsible for color vision deficiencies and mutations have been identified that affect the Opsin genes number of cone types, the absorption spectra of the pigments, the functionality and viability of the cones, Evolution and the topography of the cone mosaic. The addition of an opsin gene, as occurred in the evolution of pri- Comparative color vision mate color vision, and has been done in experimental animals can produce expanded color vision capac- Cone photopigments ities and this has provided insight into the underlying neural circuitry. -
Splicing-Correcting Therapeutic Approaches for Retinal Dystrophies: Where Endogenous Gene Regulation and Specificity Matter
New Developments Splicing-Correcting Therapeutic Approaches for Retinal Dystrophies: Where Endogenous Gene Regulation and Specificity Matter Niccolo` Bacchi,1 Simona Casarosa,1,2 and Michela A. Denti1,3 1Centre for Integrative Biology (CIBIO) - University of Trento, Trento, Italy 2Neuroscience Institute - National Research Council (CNR), Pisa, Italy 3Neuroscience Institute - National Research Council (CNR), Padova, Italy Correspondence: Simona Casarosa, Splicing is an important and highly regulated step in gene expression. The ability to modulate Centre for Integrative Biology it can offer a therapeutic option for many genetic disorders. Antisense-mediated splicing- (CIBIO) - University of Trento, Via correction approaches have recently been successfully exploited for some genetic diseases, Sommarive 9, 38123 Trento, Italy; and are currently demonstrating safety and efficacy in different clinical trials. Their [email protected]. application for the treatment of retinal dystrophies could potentially solve a vast panel of Michela A. Denti, Centre for Inte- grative Biology (CIBIO) - University cases, as illustrated by the abundance of mutations that could be targeted and the versatility of ofTrento,ViaSommarive9,38123 the technique. In this review, we will give an insight of the different therapeutic strategies, Trento, Italy; focusing on the current status of their application for retinal dystrophies. [email protected]. Keywords: splicing correction, antisense oligonucleotides, retinal dystrophy, gene therapy SC and MAD contributed equally to the work presented here and should therefore be regarded as equivalent authors. Submitted: April 8, 2014 Accepted: April 11, 2014 Citation: Bacchi N, Casarosa S, Denti MA. Splicing-correcting therapeutic approaches for retinal dystrophies: where endogenous gene regulation and specificity matter. Invest Oph- thalmol Vis Sci. -
Ablation of EYS in Zebrafish Causes Mislocalisation of Outer Segment
www.nature.com/scientificreports OPEN Ablation of EYS in zebrafish causes mislocalisation of outer segment proteins, F-actin disruption and Received: 02 November 2016 Accepted: 10 March 2017 cone-rod dystrophy Published: 05 April 2017 Zhaojing Lu1,*, Xuebin Hu1,*, Fei Liu1, Dinesh C. Soares2, Xiliang Liu1, Shanshan Yu1, Meng Gao1, Shanshan Han1, Yayun Qin1, Chang Li1, Tao Jiang1, Daji Luo3, An-Yuan Guo4, Zhaohui Tang1 & Mugen Liu1 Mutations in EYS are associated with autosomal recessive retinitis pigmentosa (arRP) and autosomal recessive cone-rod dystrophy (arCRD) however, the function of EYS and the molecular mechanisms of how these mutations cause retinal degeneration are still unclear. Because EYS is absent in mouse and rat, and the structure of the retina differs substantially between humans andDrosophila , we utilised zebrafish as a model organism to study the function ofEYS in the retina. We constructed an EYS-knockout zebrafish-line by TALEN technology which showed visual impairment at an early age, while the histological and immunofluorescence assays indicated the presence of progressive retinal degeneration with a cone predominately affected pattern. These phenotypes recapitulate the clinical manifestations of arCRD patients. Furthermore, the EYS−/− zebrafish also showed mislocalisation of certain outer segment proteins (rhodopsin, opn1lw, opn1sw1, GNB3 and PRPH2), and disruption of actin filaments in photoreceptors. Protein mislocalisation may, therefore, disrupt the function of cones and rods in these zebrafish and cause photoreceptor death. Collectively, these results point to a novel role for EYS in maintaining the morphological structure of F-actin and in protein transport, loss of this function might be the trigger for the resultant cellular events that ultimately lead to photoreceptor death. -
Transcriptomic Analysis of Human Retinal Detachment Reveals Both Inflammatory Response and Photoreceptor Death
Transcriptomic analysis of human retinal detachment reveals both inflammatory response and photoreceptor death. Marie-Noëlle Delyfer, Wolfgang Raffelsberger, David Mercier, Jean-François Korobelnik, Alain Gaudric, David Charteris, Ramin Tadayoni, Florence Metge, Georges Caputo, Pierre-Olivier Barale, et al. To cite this version: Marie-Noëlle Delyfer, Wolfgang Raffelsberger, David Mercier, Jean-François Korobelnik, Alain Gau- dric, et al.. Transcriptomic analysis of human retinal detachment reveals both inflammatory re- sponse and photoreceptor death.. PLoS ONE, Public Library of Science, 2011, 6 (12), pp.e28791. 10.1371/journal.pone.0028791. inserm-00665567 HAL Id: inserm-00665567 https://www.hal.inserm.fr/inserm-00665567 Submitted on 2 Feb 2012 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Transcriptomic Analysis of Human Retinal Detachment Reveals Both Inflammatory Response and Photoreceptor Death Marie-Noe¨lle Delyfer1,2,3,4, Wolfgang Raffelsberger5, David Mercier6, Jean-Franc¸ois Korobelnik4, Alain Gaudric7, David G. Charteris8, Ramin Tadayoni7, -
Supplementary Materials
Supplementary materials Supplementary Table S1: MGNC compound library Ingredien Molecule Caco- Mol ID MW AlogP OB (%) BBB DL FASA- HL t Name Name 2 shengdi MOL012254 campesterol 400.8 7.63 37.58 1.34 0.98 0.7 0.21 20.2 shengdi MOL000519 coniferin 314.4 3.16 31.11 0.42 -0.2 0.3 0.27 74.6 beta- shengdi MOL000359 414.8 8.08 36.91 1.32 0.99 0.8 0.23 20.2 sitosterol pachymic shengdi MOL000289 528.9 6.54 33.63 0.1 -0.6 0.8 0 9.27 acid Poricoic acid shengdi MOL000291 484.7 5.64 30.52 -0.08 -0.9 0.8 0 8.67 B Chrysanthem shengdi MOL004492 585 8.24 38.72 0.51 -1 0.6 0.3 17.5 axanthin 20- shengdi MOL011455 Hexadecano 418.6 1.91 32.7 -0.24 -0.4 0.7 0.29 104 ylingenol huanglian MOL001454 berberine 336.4 3.45 36.86 1.24 0.57 0.8 0.19 6.57 huanglian MOL013352 Obacunone 454.6 2.68 43.29 0.01 -0.4 0.8 0.31 -13 huanglian MOL002894 berberrubine 322.4 3.2 35.74 1.07 0.17 0.7 0.24 6.46 huanglian MOL002897 epiberberine 336.4 3.45 43.09 1.17 0.4 0.8 0.19 6.1 huanglian MOL002903 (R)-Canadine 339.4 3.4 55.37 1.04 0.57 0.8 0.2 6.41 huanglian MOL002904 Berlambine 351.4 2.49 36.68 0.97 0.17 0.8 0.28 7.33 Corchorosid huanglian MOL002907 404.6 1.34 105 -0.91 -1.3 0.8 0.29 6.68 e A_qt Magnogrand huanglian MOL000622 266.4 1.18 63.71 0.02 -0.2 0.2 0.3 3.17 iolide huanglian MOL000762 Palmidin A 510.5 4.52 35.36 -0.38 -1.5 0.7 0.39 33.2 huanglian MOL000785 palmatine 352.4 3.65 64.6 1.33 0.37 0.7 0.13 2.25 huanglian MOL000098 quercetin 302.3 1.5 46.43 0.05 -0.8 0.3 0.38 14.4 huanglian MOL001458 coptisine 320.3 3.25 30.67 1.21 0.32 0.9 0.26 9.33 huanglian MOL002668 Worenine -
Differential Regulation of Serotonin 2A Receptor Responsiveness by Agonist
Differential regulation of serotonin 2A receptor responsiveness by agonist- directed interactions with arrestin2 DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Cullen Laura Schmid, B.S. Neuroscience Graduate Studies Program The Ohio State University 2011 Dissertation Committee: Laura M. Bohn, Co-advisor Georgia A. Bishop, Co-advisor Candice C. Askwith Wolfgang Sadee Copyright by Cullen Laura Schmid 2011 Abstract The G protein-coupled, serotonin 2A (5-HT2A) receptor is a major drug target for the treatment of a number of mental health disorders, including schizophrenia, anxiety and depression. In addition to modulating several of the physiological effects of the neurotransmitter serotonin, activation of the 5-HT2A receptor mediates the psychotomimetic effects of serotonergic hallucinogenic drugs, such as lysergic acid diethylamide (LSD), 2,5-dimethoxy-4-iodoamphetamine (DOI) and 5-methoxy-N,N- dimethyltryptamine (5-MeO-DMT). Though hallucinogens are agonists at the 5-HT2A receptor, not all 5-HT2A receptor agonists induce hallucinations in humans, including the endogenous ligand serotonin. Therefore, the activation of the 5-HT2A receptor can result in different biological responses depending upon the chemical nature of the ligand, a concept that has been referred to as “functional selectivity.” One way in which ligands can induce differential signaling at GPCRs is through interactions with arrestins, which can act to dampen or facilitate receptor signaling cascades or mediate the internalization of receptors into intracellular vesicles. The overarching hypothesis of this dissertation is that the interaction between the regulatory protein, arrestin2, and the 5-HT2A receptor is a critical point in the divergence of agonist-directed 5-HT2A receptor responsiveness. -
OPN1LW Gene Opsin 1, Long Wave Sensitive
OPN1LW gene opsin 1, long wave sensitive Normal Function The OPN1LW gene provides instructions for making a protein that is essential for normal color vision. This protein is found in the retina, which is the light-sensitive tissue at the back of the eye. The retina contains two types of light receptor cells, called rods and cones, that transmit visual signals from the eye to the brain. Rods provide vision in low light. Cones provide vision in bright light, including color vision. There are three types of cones, each containing a specific pigment (a photopigment called an opsin) that is most sensitive to particular wavelengths of light. The OPN1LW gene provides instructions for making an opsin pigment that is more sensitive to light in the yellow/orange part of the visible spectrum (long-wavelength light). Cones with this pigment are called long-wavelength-sensitive or L cones. In response to light, the photopigment triggers a series of chemical reactions within an L cone. These reactions ultimately alter the cell's electrical charge, generating a signal that is transmitted to the brain. The brain combines input from all three types of cones to produce normal color vision. The OPN1LW gene is located next to another opsin pigment gene, OPN1MW, on the X chromosome. The OPN1MW gene provides instructions for making a photopigment that is more sensitive to light at middle wavelengths (yellow/green light). Most people have one copy of the OPN1LW gene and one or more copies of the OPN1MW gene on each X chromosome. A nearby region of DNA, known as the locus control region (LCR), regulates the activity of these genes. -
Intermixing the OPN1LW and OPN1MW Genes Disrupts the Exonic Splicing Code Causing an Array of Vision Disorders
G C A T T A C G G C A T genes Review Intermixing the OPN1LW and OPN1MW Genes Disrupts the Exonic Splicing Code Causing an Array of Vision Disorders Maureen Neitz * and Jay Neitz Department of Ophthalmology and Vision Science Center, University of Washington, Seattle, WA 98109, USA; [email protected] * Correspondence: [email protected]; Tel.: +1-206-543-7998 Abstract: Light absorption by photopigment molecules expressed in the photoreceptors in the retina is the first step in seeing. Two types of photoreceptors in the human retina are responsible for image formation: rods, and cones. Except at very low light levels when rods are active, all vision is based on cones. Cones mediate high acuity vision and color vision. Furthermore, they are critically important in the visual feedback mechanism that regulates refractive development of the eye during childhood. The human retina contains a mosaic of three cone types, short-wavelength (S), long-wavelength (L), and middle-wavelength (M) sensitive; however, the vast majority (~94%) are L and M cones. The OPN1LW and OPN1MW genes, located on the X-chromosome at Xq28, encode the protein component of the light-sensitive photopigments expressed in the L and M cones. Diverse haplotypes of exon 3 of the OPN1LW and OPN1MW genes arose thru unequal recombination mechanisms that have intermixed the genes. A subset of the haplotypes causes exon 3- skipping during pre-messenger RNA splicing and are associated with vision disorders. Here, we review the mechanism by which splicing defects in these genes cause vision disorders. Citation: Neitz, M.; Neitz, J. -
Multi-Functionality of Proteins Involved in GPCR and G Protein Signaling: Making Sense of Structure–Function Continuum with In
Cellular and Molecular Life Sciences (2019) 76:4461–4492 https://doi.org/10.1007/s00018-019-03276-1 Cellular andMolecular Life Sciences REVIEW Multi‑functionality of proteins involved in GPCR and G protein signaling: making sense of structure–function continuum with intrinsic disorder‑based proteoforms Alexander V. Fonin1 · April L. Darling2 · Irina M. Kuznetsova1 · Konstantin K. Turoverov1,3 · Vladimir N. Uversky2,4 Received: 5 August 2019 / Revised: 5 August 2019 / Accepted: 12 August 2019 / Published online: 19 August 2019 © Springer Nature Switzerland AG 2019 Abstract GPCR–G protein signaling system recognizes a multitude of extracellular ligands and triggers a variety of intracellular signal- ing cascades in response. In humans, this system includes more than 800 various GPCRs and a large set of heterotrimeric G proteins. Complexity of this system goes far beyond a multitude of pair-wise ligand–GPCR and GPCR–G protein interactions. In fact, one GPCR can recognize more than one extracellular signal and interact with more than one G protein. Furthermore, one ligand can activate more than one GPCR, and multiple GPCRs can couple to the same G protein. This defnes an intricate multifunctionality of this important signaling system. Here, we show that the multifunctionality of GPCR–G protein system represents an illustrative example of the protein structure–function continuum, where structures of the involved proteins represent a complex mosaic of diferently folded regions (foldons, non-foldons, unfoldons, semi-foldons, and inducible foldons). The functionality of resulting highly dynamic conformational ensembles is fne-tuned by various post-translational modifcations and alternative splicing, and such ensembles can undergo dramatic changes at interaction with their specifc partners.