0000000000124478

AUTHOR

Jan Reiners

showing 7 related works from this author

Myosin VIIa, harmonin and cadherin 23, three Usher I gene products that cooperate to shape the sensory hair cell bundle

2002

Deaf-blindness in three distinct genetic forms of Usher type I syndrome (USH1) is caused by defects in myosin VIIa, harmonin and cadherin 23. Despite being critical for hearing, the functions of these proteins in the inner ear remain elusive. Here we show that harmonin, a PDZ domain-containing protein, and cadherin 23 are both present in the growing stereocilia and that they bind to each other. Moreover, we demonstrate that harmonin b is an F-actin-bundling protein, which is thus likely to anchor cadherin 23 to the stereocilia microfilaments, thereby identifying a novel anchorage mode of the cadherins to the actin cytoskeleton. Moreover, harmonin b interacts directly with myosin VIIa, and i…

DNA ComplementaryCadherin Related ProteinsCell Cycle Proteinsmacromolecular substancesMyosinsBiologyTransfectionMicrofilamentGeneral Biochemistry Genetics and Molecular BiologyCell LineMiceCDH23Two-Hybrid System TechniquesHair Cells Auditoryotorhinolaryngologic diseasesmedicineAnimalsHumansProtein IsoformsRats WistarMolecular BiologyActinAdaptor Proteins Signal TransducingGene LibraryGeneral Immunology and MicrobiologyCadherinGeneral NeuroscienceStereociliaDyneinsCell DifferentiationArticlesCadherinsActin cytoskeletonActinsProtein Structure TertiaryRatsCell biologyCytoskeletal ProteinsMicroscopy Electronmedicine.anatomical_structureMicroscopy FluorescenceMyosin VIIasense organsCarrier ProteinsTip linkPCDH15HeLa CellsProtein BindingThe EMBO Journal
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Differential Distribution of Harmonin Isoforms and Their Possible Role in Usher-1 Protein Complexes in Mammalian Photoreceptor Cells

2003

PURPOSE. Human Usher syndrome is the most common form of combined deafness and blindness. Usher type I (USH1), the most severe form, is characterized by profound congenital deafness, constant vestibular dysfunction, and prepubertal onset retinitis pigmentosa. Previous studies have shown that the USH1-proteins myosin VIIa, harmonin, and cadherin 23 interact and form a functional network during hair cell differentiation in the inner ear. The purpose of the present study was to analyze the molecular and cellular functions of these USH1 proteins in the mammalian retina. METHODS. Antibodies to USH1 proteins were generated and used in Western blot analysis of subcellular photoreceptor fractions a…

Gene isoformUsher syndromeBlotting WesternSynaptophysinCell Cycle ProteinsMyosinsBiologyPhotoreceptor cellMiceRetinitis pigmentosaotorhinolaryngologic diseasesmedicineAnimalsProtein IsoformsRats WistarFluorescent Antibody Technique IndirectMicroscopy ImmunoelectronCytoskeletonGeneticsRetinaHair cell differentiationReverse Transcriptase Polymerase Chain ReactionCadherinDyneinsCadherinsmedicine.diseaseeye diseasesRatsCell biologyMice Inbred C57BLCytoskeletal Proteinsmedicine.anatomical_structureMicroscopy FluorescenceMyosin VIIasense organsCarrier ProteinsPhotoreceptor Cells VertebrateSubcellular FractionsInvestigative Opthalmology & Visual Science
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The Role of Cadherins in Ca2+-Mediated Cell Adhesion and Inherited Photoreceptor Degeneration

2002

Cadherins are Ca2+-binding, transmembrane proteins involved in cell adhesion. Recently, three cadherin molecules, cadherin-23, protocadherin-15, and cadherin-3, were found to be defective in various human diseases, many of them with photoreceptor degeneration and/or sensorineural hearing loss as major features such Usher syndrome type 1D (USH1D), USH1F, and hypotrichosis with juvenile macular dystrophy. The process, by which mutations lead to photoreceptor degeneration is still not fully understood. Data from the inner ear phenotype of USH1 mouse models suggest that loss of cell adhesion is a crucial event.

CadherinUsher syndromeMacular dystrophyBiologymedicine.diseasePhenotypeTransmembrane proteinCell biologyRetinitis pigmentosaotorhinolaryngologic diseasesmedicineHypotrichosissense organsCell adhesion
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Scaffold protein harmonin (USH1C) provides molecular links between Usher syndrome type 1 and type 2.

2005

Contains fulltext : 48386.pdf (Publisher’s version ) (Closed access) Usher syndrome (USH) is the most frequent cause of combined deaf-blindness in man. USH is clinically and genetically heterogeneous with at least 11 chromosomal loci assigned to the three USH types (USH1A-G, USH2A-C, USH3A). Although the different USH types exhibit almost the same phenotype in human, the identified USH genes encode for proteins which belong to very different protein classes and families. We and others recently reported that the scaffold protein harmonin (USH1C-gene product) integrates all identified USH1 molecules in a USH1-protein network. Here, we investigated the relationship between the USH2 molecules a…

Scaffold proteinGenetics and epigenetic pathways of disease [NCMLS 6]Usher syndromeStereocilia (inner ear)Cell Cycle ProteinsBiologyInteractomeReceptors G-Protein-CoupledMiceotorhinolaryngologic diseasesGeneticsmedicineAnimalsNeurosensory disorders [UMCN 3.3]Photoreceptor CellsRats WistarMolecular BiologyGeneGenetics (clinical)Renal disorder [IGMD 9]GeneticsExtracellular Matrix ProteinsStereociliumBinding SitesHair Cells Auditory InnerSodium-Bicarbonate SymportersUsher Syndrome Type 1General Medicinemedicine.diseasePhenotypeRatsMice Inbred C57BLCytoskeletal ProteinsCarrier ProteinsUsher Syndromes
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Interactions in the network of Usher syndrome type 1 proteins

2004

International audience; Defects in myosin VIIa, harmonin (a PDZ domain protein), cadherin 23, protocadherin 15 and sans (a putative scaffolding protein), underlie five forms of Usher syndrome type I (USH1). Mouse mutants for all these proteins exhibit disorganization of their hair bundle, which is the mechanotransduction receptive structure of the inner ear sensory cells, the cochlear and vestibular hair cells. We have previously demonstrated that harmonin interacts with cadherin 23 and myosin VIIa. Here we address the extent of interactions between the five known USH1 proteins. We establish the previously suggested sans-harmonin interaction and find that sans also binds to myosin VIIa. We …

[SDV]Life Sciences [q-bio]Hearing Loss SensorineuralStereocilia (inner ear)PDZ domainCadherin Related ProteinsProtocadherinCell Cycle ProteinsNerve Tissue ProteinsCuticular plateMyosinsBiologyMiceTwo-Hybrid System TechniquesHair Cells AuditoryBone plateMyosinotorhinolaryngologic diseasesGeneticsAnimalsHumansProtein PrecursorsMolecular BiologyGenetics (clinical)GeneticsStereociliumDyneinsSyndromeGeneral MedicineCadherinsCell biologyCytoskeletal ProteinsMyosin VIIaMutationsense organsCarrier ProteinsRetinitis PigmentosaPCDH15HeLa CellsProtein BindingHuman Molecular Genetics
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Molecular Analysis of the Supramolecular Usher Protein Complex in the Retina

2007

Human Usher syndrome (USH) is the most common form of deaf-blindness and also the most frequent case of recessive retinitis pigmentosa. According to the degree of the clinical symptoms, three different types of the Usher syndrome are distinguished: USH1, USH2 and USH3 (Davenport and Omenn, 1977). USH is genetically heterogeneous with eleven chromosomal loci, which can be assigned to the three USH types (USH1A-G, USH2A-C, USH3A) (Petit, 2001). Out of these, USH1 is the most severe form, characterized by profound congenital deafness, constant vestibular dysfunction and prepubertal-onset retinitis pigmentosa. USH2 patients show a milder congenital deafness, a slightly later onset of retinitis …

GeneticsScaffold proteinGenetic heterogeneityHearing lossUsher syndromePDZ domainLate onsetBiologymedicine.diseasePhenotypeRetinitis pigmentosaotorhinolaryngologic diseasesmedicinemedicine.symptom
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Molecular basis of human Usher syndrome: deciphering the meshes of the Usher protein network provides insights into the pathomechanisms of the Usher …

2006

Usher syndrome (USH) is the most frequent cause of combined deaf-blindness in man. It is clinically and genetically heterogeneous and at least 12 chromosomal loci are assigned to three clinical USH types, namely USH1A-G, USH2A-C, USH3A (Davenport, S.L.H., Omenn, G.S., 1977. The heterogeneity of Usher syndrome. Vth Int. Conf. Birth Defects, Montreal; Petit, C., 2001. Usher syndrome: from genetics to pathogenesis. Annu. Rev. Genomics Hum. Genet. 2, 271-297). Mutations in USH type 1 genes cause the most severe form of USH. In USH1 patients, congenital deafness is combined with a pre-pubertal onset of retinitis pigmentosa (RP) and severe vestibular dysfunctions. Those with USH2 have moderate to…

Scaffold proteinModels MolecularUsher syndromePDZ domainProtocadherinCadherin Related ProteinsCell Cycle ProteinsNerve Tissue ProteinsBiologyDeafnessMyosinsCellular and Molecular NeuroscienceRetinitis pigmentosaotorhinolaryngologic diseasesmedicineAnimalsHumansAdaptor Proteins Signal TransducingGeneticsExtracellular Matrix ProteinsModels GeneticCadherinRetinal DegenerationSignal transducing adaptor proteinDyneinsMembrane Proteinsmedicine.diseaseCadherinsSensory SystemsOphthalmologyCytoskeletal ProteinsDisease Models AnimalMembrane proteinMyosin VIIaMutationMicrotubule ProteinsVestibule LabyrinthUsher SyndromesExperimental eye research
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