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  • 1
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    Functional interaction of an axin homolog, conductin, with beta-catenin, APC, and GSK3beta (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-05-09
    Description: Control of stability of beta-catenin is central in the wnt signaling pathway. Here, the protein conductin was found to form a complex with both beta-catenin and the tumor suppressor gene product adenomatous polyposis coli (APC). Conductin induced beta-catenin degradation, whereas mutants of conductin that were deficient in complex formation stabilized beta-catenin. Fragments of APC that contained a conductin-binding domain also blocked beta-catenin degradation. Thus, conductin is a component of the multiprotein complex that directs beta-catenin to degradation and is located downstream of APC. In Xenopus embryos, conductin interfered with wnt-induced axis formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Behrens, J -- Jerchow, B A -- Wurtele, M -- Grimm, J -- Asbrand, C -- Wirtz, R -- Kuhl, M -- Wedlich, D -- Birchmeier, W -- New York, N.Y. -- Science. 1998 Apr 24;280(5363):596-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Delbruck Center for Molecular Medicine, Robert-Rossle-Strasse 10, 13122 Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9554852" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli Protein ; Amino Acid Sequence ; Animals ; Axin Protein ; Binding Sites ; Body Patterning ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Cytoskeletal Proteins/chemistry/genetics/*metabolism ; Glycogen Synthase Kinase 3 ; Humans ; Mice ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Proteins/chemistry ; Proto-Oncogene Proteins/metabolism ; *Repressor Proteins ; Signal Transduction ; *Trans-Activators ; Tumor Cells, Cultured ; Xenopus/embryology ; Xenopus Proteins ; beta Catenin
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    The ubiquitin ligase SCFFbw7 antagonizes apoptotic JNK signaling (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-24
    Description: Jun N-terminal kinases (JNKs) are essential for neuronal microtubule assembly and apoptosis. Phosphorylation of the activating protein 1 (AP1) transcription factor c-Jun, at multiple sites within its transactivation domain, is required for JNK-induced neurotoxicity. We report that in neurons the stability of c-Jun is regulated by the E3 ligase SCF(Fbw7), which ubiquitinates phosphorylated c-Jun and facilitates c-Jun degradation. Fbw7 depletion resulted in accumulation of phosphorylated c-Jun, stimulation of AP1 activity, and neuronal apoptosis. SCF(Fbw7) therefore antagonizes the apoptotic c-Jun-dependent effector arm of JNK signaling, allowing neurons to tolerate potentially neurotoxic JNK activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nateri, Abdolrahman S -- Riera-Sans, Lluis -- Da Costa, Clive -- Behrens, Axel -- New York, N.Y. -- Science. 2004 Feb 27;303(5662):1374-8. Epub 2004 Jan 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mammalian Genetics Laboratory, Cancer Research UK, London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London WC2A 3PX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14739463" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Apoptosis ; Base Sequence ; Cell Cycle Proteins/genetics/*metabolism ; Cell Line ; F-Box Proteins/genetics/*metabolism ; Humans ; JNK Mitogen-Activated Protein Kinases ; MAP Kinase Signaling System ; Mice ; Mitogen-Activated Protein Kinases/*metabolism ; Molecular Sequence Data ; Neurons/*physiology ; PC12 Cells ; Phosphorylation ; Proto-Oncogene Proteins c-jun/*metabolism ; RNA, Small Interfering/metabolism ; Rats ; Transcription Factor AP-1/metabolism ; Transfection ; Ubiquitin/metabolism ; Ubiquitin-Protein Ligases/genetics/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    The structure of arthropod hemocyanins (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-08-09
    Description: Hemocyanins are large multi-subunit copper proteins that transport oxygen in many arthropods and molluscs. Comparison of the amino acid sequence data for seven different subunits of arthropod hemocyanins from crustaceans and chelicerates shows many highly conserved residues and extensive regions of near identity. This correspondence can be matched closely with the three domain structure established by x-ray crystallography for spiny lobster hemocyanin. The degree of identity is particularly striking in the second domain of the subunit that contains the six histidines which ligate the two oxygen-binding copper atoms. The polypeptide architecture of spiny lobster hemocyanin appears to be the same in all arthropods. This structure must therefore be at least as old as the estimated time of divergence of crustaceans and chelicerates, about 540 to 600 million years ago.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Linzen, B -- Soeter, N M -- Riggs, A F -- Schneider, H J -- Schartau, W -- Moore, M D -- Yokota, E -- Behrens, P Q -- Nakashima, H -- Takagi, T -- GM 21314/GM/NIGMS NIH HHS/ -- GM 28410/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Aug 9;229(4713):519-24.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4023698" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Arachnida/genetics ; *Arthropods/genetics ; Binding Sites ; Biological Evolution ; Chemical Phenomena ; Chemistry ; Copper ; Crustacea/genetics ; *Hemocyanin/genetics ; Models, Molecular ; Protein Conformation ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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