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101.
Rosella Mollicone Anne Cailleau Anne Imberty Pierre Gane Serge Perez Rafael Oriol 《Glycoconjugate journal》1996,13(2):263-271
The patterns of cross-reaction of 30 monoclonal antibodies and three lectins were determined by ELISA with 21 ABH, Ii or Lewis related synthetic oligosaccharides coupled to bovine serum albumin. At least seven main groups of cross-reactive patterns were identified among the antibodies, plus several intermediate patterns between two of the main antibody groups. The three lectins had different cross-reaction patterns,Galactia tenuiflora was different from all the antibodies,Ulex europaeus lectin 1 andLotus tetragonolobus were similar, but not identical to groups III and V of antibodies respectively. The anti-H antibodies cross-reacting with A type 2 gave similar agglutination scores with all the normal ABO erythrocytes, while the anti-H antibodies not cross-reacting with A type 2 reacted with different scores: O>A2>A2B>B>A1>A1B>Oh, suggesting that these antibodies react better with the free H epitopes and do not recognize the H in A or B epitopes. Based on the ELISA and agglutination results and the lowest energy conformations of each oligosaccharide obtained by computer modelling, the most probable oligosaccharide surface areas recognized by each antibody main group are illustrated. 相似文献
102.
103.
104.
Lopez C Métral S Eladari D Drevensek S Gane P Chambrey R Bennett V Cartron JP Le Van Kim C Colin Y 《The Journal of biological chemistry》2005,280(9):8221-8228
RhBG is a nonerythroid member of the Rhesus (Rh) protein family, mainly expressed in the kidney and belonging to the Amt/Mep/Rh superfamily of ammonium transporters. The epithelial expression of renal RhBG is restricted to the basolateral membrane of the connecting tubule and collecting duct cells. We report here that sorting and anchoring of RhBG to the basolateral plasma membrane require a cis-tyrosine-based signal and an association with ankyrin-G, respectively. First, we show by using a model of polarized epithelial Madin-Darby canine kidney cells that the targeting of transfected RhBG depends on a YED motif localized in the cytoplasmic C terminus of the protein. Second, we reveal by yeast two-hybrid analysis a direct interaction between an FLD determinant in the cytoplasmic C-terminal tail of RhBG and the third and fourth repeat domains of ankyrin-G. The biological relevance of this interaction is supported by two observations. (i) RhBG and ankyrin-G were colocalized in vivo in the basolateral domain of epithelial cells from the distal nephron by immunohistochemistry on kidney sections. (ii) The disruption of the FLD-binding motif impaired the membrane expression of RhBG leading to retention on cytoplasmic structures in transfected Madin-Darby canine kidney cells. Mutation of both targeting signal and ankyrin-G-binding site resulted in the same cell surface but nonpolarized expression pattern as observed for the protein mutated on the targeting signal alone, suggesting the existence of a close relationship between sorting and anchoring of RhBG to the basolateral domain of epithelial cells. 相似文献
105.
Hermand P Gane P Huet M Jallu V Kaplan C Sonneborn HH Cartron JP Bailly P 《The Journal of biological chemistry》2003,278(7):4892-4898
ICAM-4 (LW blood group glycoprotein) is an erythroid-specific membrane component that belongs to the family of intercellular adhesion molecules and interacts in vitro with different members of the integrin family, suggesting a potential role in adhesion or cell interaction events, including hemostasis and thrombosis. To evaluate the capacity of ICAM-4 to interact with platelets, we have immobilized red blood cells (RBCs), platelets, and ICAM-Fc fusion proteins to a plastic surface and analyzed their interaction in cell adhesion assays with RBCs and platelets from normal individuals and patients, as well as with cell transfectants expressing the alpha(IIb)beta(3) integrin. The platelet fibrinogen receptor alpha(IIb)beta(3) (platelet GPIIb-IIIa) in a high affinity state following GRGDSP peptide activation was identified for the first time as the receptor for RBC ICAM-4. The specificity of the interaction was demonstrated by showing that: (i) activated platelets adhered less efficiently to immobilized ICAM-4-negative than to ICAM-4-positive RBCs, (ii) monoclonal antibodies specific for the beta(3)-chain alone and for a complex-specific epitope of the alpha(IIb)beta(3) integrin, and specific for ICAM-4 to a lesser extent, inhibited platelet adhesion, whereas monoclonal antibodies to GPIb, CD36, and CD47 did not, (iii) activated platelets from two unrelated type-I glanzmann's thrombasthenia patients did not bind to coated ICAM-4. Further support to RBC-platelet interaction was provided by showing that dithiothreitol-activated alpha(IIb)beta(3)-Chinese hamster ovary transfectants strongly adhere to coated ICAM-4-Fc protein but not to ICAM-1-Fc and was inhibitable by specific antibodies. Deletion of individual Ig domains of ICAM-4 and inhibition by synthetic peptides showed that the alpha(IIb)beta(3) integrin binding site encompassed the first and second Ig domains and that the G65-V74 sequence of domain D1 might play a role in this interaction. Although normal RBCs are considered passively entrapped in fibrin polymers during thrombus, these studies identify ICAM-4 as the first RBC protein ligand of platelets that may have relevant physiological significance. 相似文献
106.
Roudier N Ripoche P Gane P Le Pennec PY Daniels G Cartron JP Bailly P 《The Journal of biological chemistry》2002,277(48):45854-45859
AQP3 is a water and glycerol channel present on human erythrocytes and in various tissues. By protein and molecular biology analysis, two unrelated probands who developed alloantibodies to the high frequency antigen GIL were found to be AQP3-deficient. The defect is caused by homozygous mutation affecting the 5' donor splice site of intron 5 of the AQP3 gene. This mutation causes the skipping of exon 5 and generates a frameshift and premature stop codon. Functional studies by 90 degrees light scattering using a stopped-flow spectrometer revealed the absence of facilitated glycerol transport across red cell membranes from the probands, but the water and urea transports were normal. Expression studies into COS-7 cells followed by flow cytometry analysis showed that only cells transfected with AQP3 cDNA strongly reacted with anti-GIL antibodies. These findings represent the first reported cases of AQP3 deficiency in humans and provide the molecular basis of a new blood group system, GIL, encoded by the AQP3 protein. 相似文献
107.
The mitochondrial genome of the peronosporomycete water mold Saprolegnia ferax has been characterized as a 46 930 bp circle containing an 8618 bp large inverted repeat (LIR). Eighteen reading frames encode identified subunits of respiratory complexes I, III, IV and V; 16 encode polypeptides of small and large mitoribosome subunits; and one encodes a subunit of the sec-independent protein translocation pathway. Of four additional putative reading frames three are homologues of those found in the related Phytophthora infestans genome. Protein encoding loci in the tightly compacted genome typically are arranged in operon-like clusters including three abutting and two overlapping pairs of reading frames. Translational RNAs include the mitochondrial small and large subunit rRNAs and 25 tRNA species. No tRNAs are encoded to enable translation of any threonine or the arginine CGR codons. The LIR separates the molecule into 19 274 bp large and 10 420 bp small single copy regions, and it encodes intact duplicate copies of four reading frames encoding known proteins, both rRNAs, and five tRNAs. Partial 3' sequences of three additional reading frames are duplicated at single copy sequence junctions. Active recombination between LIR elements generates two distinctive gene orders and uses the duplicated 3' sequences to maintain intact copies of the partially duplicated loci. 相似文献
108.
Omega-carboxypyridyl substituted ureas as Raf kinase inhibitors: SAR of the amide substituent 总被引:2,自引:0,他引:2
Khire UR Bankston D Barbosa J Brittelli DR Caringal Y Carlson R Dumas J Gane T Heald SL Hibner B Johnson JS Katz ME Kennure N Kingery-Wood J Lee W Liu XG Lowinger TB McAlexander I Monahan MK Natero R Renick J Riedl B Rong H Sibley RN Smith RA Wolanin D 《Bioorganic & medicinal chemistry letters》2004,14(3):783-786
Bis-aryl ureas have been disclosed previously as a potent class of Raf kinase inhibitors. Modifications in the amide portion led to an improvement in aqueous solubility, an important characteristic for an oral drug. Based on this finding, we hypothesize that this portion of the molecule is directed towards the solvent in Raf-1. 相似文献
109.
110.
El Nemer W Gane P Colin Y D'Ambrosio AM Callebaut I Cartron JP Van Kim CL 《The Journal of biological chemistry》2001,276(26):23757-23762
Lutheran (Lu) blood group antigens and the basal cell adhesion molecule antigen reside on two glycoproteins that belong to the Ig superfamily (IgSF) and carry five Ig-like extracellular domains. These glycoproteins act as widely expressed adhesion molecules and represent the unique receptors for laminin-10/11 in erythroid cells. Here, we report the mapping of IgSF domains responsible for binding to laminin. In plasmonic resonance surface experiments, only recombinant Lu proteins containing the N-terminal IgSF domains 1-3 were able to bind laminin-10/11 and to inhibit binding of laminin to Lu-expressing K562 cells. Mutant recombinant proteins containing only IgSF domain 1, domains 1 + 2, domains 1 + 3, domains 2 + 3, domain 3, domain 4, domain 5, and domains 4 + 5 failed to bind laminin as well as a construct containing all of the extracellular domains except domain 3. Altogether, these results indicate that IgSF domains 1-3 are involved in laminin binding and that a specific spatial arrangement of these three first domains is most probably necessary for interaction. Neither the RGD nor the N-glycosylation motifs present in IgSF domain 3 were involved in laminin binding. 相似文献