Frederic BARD   cell structure and function
                       
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  Frederic BARD  
  Lab Location: #5-12

email:
fbard@imcb.a-star.edu.sg
tel:65869585
 
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  Key Publications  
 

R Bard F, Malhotra V
Transit from the Trans-Golgi Network to the plasma membrane. Annu Rev Cell Dev Biol. 2006;22:439-55.

Bard F, Casano L, Mallabiabarrena A, Wallace E, Saito K, Kitayama H, Guizzinti G, Hu Y, DasGupta R, Perrimon N, Malhotra V. Functional genomics reveals new genes involved in protein secretion and Golgi organization.Nature. 2006 Feb 2;439(7076):604-7

Yeaman C, Ayala MI, Wright JR, Bard F, Bossard C, Ang A, Maeda Y, Seufferlein T, Mellman I, Nelson WJ, Malhotra V.
Protein kinase D regulates basolateral membrane protein exit from trans-Golgi network. Nat Cell Biol. 2004 Feb;6(2):106-12.

Saltel F, Destaing O, Bard F, Eichert D, Jurdic P.
Apatite-mediated actin dynamics in resorbing osteoclasts. Mol Biol Cell. 2004 15, 5231-41.

Bard F, Mazelin L, Pechoux-Longin C, Malhotra V, Jurdic P.
Src regulates Golgi structure and KDEL receptor-dependent retrograde transport to the endoplasmic reticulum.             J Biol Chem. 2003 Nov 21;278(47):46601-6.

Destaing O, Saltel F, Geminard JC, Jurdic P, Bard F. Podosomes display actin turnover and dynamic self-organization in osteoclasts expressing actin-green fluorescent protein. Mol Biol Cell. 2003 Feb;14(2):407-16.

 
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  Frederic BARD


Frederic Bard did his graduate work at Yale University, USA and at the Ecole Normale Superieure of Lyon, France where he obtained his PhD. He elucidated the dynamics of the sealing zone, a unique actin cytoskeleton structure in osteoclasts required for bone resorption. During his postdoctoral work at the University of California San Diego (2001-2006), he identified a collection of new genes essential for general protein secretion, the TANGO genes.

     
  Regulation of Membrane Traffic
 


Hormonal secretion for metabolic and behavioral regulation, extra-cellular matrix proteins secretion for tissue modeling, neurotransmitters secretion for synaptic function or mucus secretion for mucosa protection: these examples illustrate how much protein secretion is central to multiple aspects of human physiology and disease.

Thanks to the power of genetics in yeast, we now understand a lot of the basic machinery that controls the secretory process. However, cells of complex multicellular organisms such as humans have dramatically evolved to accommodate novel secretory functions unknown in yeast, for example the regulated secretion of hormones or mucus. In conjunction, the central organelle of the secretory pathway, the Golgi apparatus, has acquired a structural and functional complexity coupled to novel regulatory functions, such as regulation of entry into mitosis. This increase in complexity in the organization and functions of the secretory pathway involves molecular players unseen in lower eukaryotes and that we have only started to identify.

The group focus is to comprehensively characterize the genes that regulate the secretory apparatus specifically in higher eukaryotes by using a functional genomics approach, the RNA interference screen at the genome scale. (click here for more details).

The Golgi apparatus

    Legend: Human Hela cells stained for the nucleus (blue), the microtubules network (red) and the Golgi apparatus (green).
     
    The yeast versus Mammalian secretory apparatuses:

   
Legend: Comparison of yeast and an epithelial mammalian cells: ER: Endoplasmic reticulum, G.A.: Golgi Apparatus, Vac: Vacuole, v: vesicle, TC: transport carrier, E/L: endosomal/lysosomal compartment, BLM: baso-lateral membrane, SG: secretory granule. The transport vector evolved from mostly vesicles in yeast cells to transport carriers, large tubular structures able to transport large size cargo, in mammalian cells. The Golgi apparatus has acquired a structural complexity, sorting events at the exit of the Golgi have diversified and new structures, such as the secretory granule, have appeared. The magnification glass points to the various cargo handle by mammalian cells, including large extracellular matrix molecules such as collagens.
 
   
         
 
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