Search results for "Collagen Type IX"

showing 3 items of 3 documents

The Fibril-associated Collagen IX Provides a Novel Mechanism for Cell Adhesion to Cartilaginous Matrix

2004

Collagen IX is the prototype fibril-associated collagen with interruptions in triple helix. In human cartilage it covers collagen fibrils, but its putative cellular receptors have been unknown. The reverse transcription-PCR analysis of human fetal tissues suggested that based on their distribution all four collagen receptor integrins, namely alpha1beta1, alpha2beta1, alpha10beta1, and alpha11beta1, are possible receptors for collagen IX. Furthermore primary chondrocytes and chondrosarcoma cells express the four integrins simultaneously. Chondrosarcoma cells, as well as Chinese hamster ovary cells transfected to express alpha1beta1, alpha2beta1, or alpha10beta1 integrin as their only collage…

Integrin alpha1Integrin alpha2LigandsPolymerase Chain ReactionBiochemistryCollagen receptorMiceCricetinaeReceptorbiologyReverse Transcriptase Polymerase Chain ReactionChemistryChinese hamster ovary cellRecombinant ProteinsCell biologyBiochemistryCollagenIntegrin alpha ChainsProtein BindingMolecular Sequence DataIntegrinChondrosarcomaCHO CellsFibrilCollagen Type IXCell LineChondrocytesMicroscopy Electron TransmissionCell Line TumorCell AdhesionEscherichia coliAnimalsHumansImmunoprecipitationAmino Acid SequenceRNA MessengerBinding siteCell adhesionMolecular BiologyBinding SitesSequence Homology Amino AcidCell BiologyProtein Structure TertiaryRatsMicroscopy ElectronCollagen type I alpha 1CartilageMutationMutagenesis Site-Directedbiology.proteinRNAPeptidesJournal of Biological Chemistry
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Cloning and expression of a type IX-like collagen in tissues of the ascidian Ciona intestinalis

2002

Collagens are highly preserved proteins in invertebrates and vertebrates. To identify the collagens in urochordates, the total RNA extracted from the pharynx of the ascidian Ciona intestinalis was hybridized with a heterologous probe specific for the echinoderm Paracentrotus lividus fibrillar type I-like larval collagen. Using this probe, two main bands (i.e. 6 and 2.8 kb mRNA) were observed on Northern blot hybridization. The cDNA library prepared from poly(A)+RNA extracted from pharyngeal tissue was screened and a cDNA that specifies a type IX-like collagen was identified. This molecule presents a conceptual open reading frame for a protein containing 734 amino acids. In particular, we sh…

Transcription GeneticAscidianMolecular Sequence DataBiophysicsIn situ hybridizationcDNA libraryBiochemistryCollagen Type IXMiceStructural BiologyComplementary DNAGeneticsAnimalsHumansCiona intestinalisTissue DistributionNorthern blotAmino Acid SequenceRNA MessengerCloning MolecularType IX-like collagenPeptide sequencePhylogenyGene LibraryMessenger RNAbiologyBase SequenceSequence Homology Amino AcidcDNA libraryRNAbiology.organism_classificationMolecular biologyCiona intestinalismRNA localizationSequence Alignment
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FACIT collagen (1α-chain) is expressed by hemocytes and epidermis during the inflammatory response of the ascidian Ciona intestinalis

2007

Based on previous cloning and sequencing study, real-time PCR and in situ hybridization assays of the inflamed body wall of LPS-injected Ciona intestinalis showed the enhanced gene expression of a collagen with FACIT structural features (Ci-type IX-Col 1alpha-chain). By using specific antibodies raised against an opportunely chosen Ci-type IX-Col synthetic peptide, the fibroblast property of hemocytes challenged in vitro with LPS (at 4h) was displayed by flow cytometry, while immunocytochemistry identified hemocytes with large granules (morula cells) as collagen-producing cells. Hemocyte lysate supernatant analyzed in immunoblotting contained a 60 kDa band identifiable as 1alpha-chain-Ci-ty…

LipopolysaccharidesHemocytesImmunologyImmunocytochemistryIn situ hybridizationCollagen Type IXFACIT collagenExtracellular matrixParacrine CommunicationEscherichia colimedicineAnimalsCiona intestinalisFibroblastIn Situ HybridizationInflammationbiologyEpidermis (botany)Gene Expression Profilingbiology.organism_classificationImmunohistochemistryMolecular biologyCiona intestinalisExtracellular Matrixmedicine.anatomical_structureEpidermal CellsImmunologyEpidermisWound healingProtein Processing Post-TranslationalProcollagenDevelopmental BiologyDevelopmental & Comparative Immunology
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