Journal ArticleDOI
Identification of the cellular receptor for anthrax toxin.
Kenneth A. Bradley,Jeremy Mogridge,Jeremy Mogridge,Michael Mourez,Robert J. Collier,John A. Young +5 more
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TLDR
The cloning of the human PA receptor is described using a genetic complementation approach and a soluble version of this domain can protect cells from the action of the toxin.Abstract:
The tripartite toxin secreted by Bacillus anthracis, the causative agent of anthrax, helps the bacterium evade the immune system and can kill the host during a systemic infection. Two components of the toxin enzymatically modify substrates within the cytosol of mammalian cells: oedema factor (OF) is an adenylate cyclase that impairs host defences through a variety of mechanisms including inhibiting phagocytosis; lethal factor (LF) is a zinc-dependent protease that cleaves mitogen-activated protein kinase kinase and causes lysis of macrophages. Protective antigen (PA), the third component, binds to a cellular receptor and mediates delivery of the enzymatic components to the cytosol. Here we describe the cloning of the human PA receptor using a genetic complementation approach. The receptor, termed ATR (anthrax toxin receptor), is a type I membrane protein with an extracellular von Willebrand factor A domain that binds directly to PA. In addition, a soluble version of this domain can protect cells from the action of the toxin.read more
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Journal Article
Evaluation of immune response to recombinant Bacillus anthracis LFD1-PA4 chimeric protein.
H Mirhaj,Hossein Honari,E Zamani +2 more
TL;DR: LFD1-PA4 chimeric protein induced a higher immune response than LFD1+PA4 mixed protein and elicited antibody responses to LF and edema factor (EF), therefore, it holds promise to be a more effective trivalent vaccine candidate to use in anthrax prevention.
Dissertation
Fluorescence studies on anthrax protective antigen pore formation and in the presence of the host receptor, CMG2
TL;DR: In this paper, the authors studied the pH dependent pore formation in presence of receptor, using fluorescence and showed that, even in case of D425A PA63 (as a control, not forming a pore), receptor dissociates at the same pH required for Pore formation.
References
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Brad St. Croix,Carlo Rago,Carlo Rago,Victor E. Velculescu,Giovanni Traverso,Katharine E. Romans,Elizabeth A. Montgomery,Anita Lal,Gregory J. Riggins,Christoph Lengauer,Bert Vogelstein,Bert Vogelstein,Kenneth W. Kinzler +12 more
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TL;DR: A second selection process occurs during immune responses in which a new antibody repertoire is generated through somatic hypermutation, where only mutants binding antigen with high affinity survive to become memory cells.
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Vesicular stomatitis virus G glycoprotein pseudotyped retroviral vectors: concentration to very high titer and efficient gene transfer into mammalian and nonmammalian cells
TL;DR: The ability to concentrate vesicular stomatitis virus G glycoprotein pseudotyped vectors will facilitate gene therapy model studies and other gene transfer experiments that require direct delivery of vectors in vivo, and facilitate genetic studies in nonmammalian species, including the important zebrafish developmental system.
Journal ArticleDOI
Spermatogenic cells of the prepuberal mouse. Isolation and morphological characterization.
TL;DR: The successful isolation of these prepuberal cell types was accomplished by defining distinctive morphological characteristics of the cells and assessing the identity and purity of the isolated cell types by microscopy.