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    Functional Redundancy of two nucleoside transporters of the ENT family (CeENT1, CeENT2) required for development of Caenorhabditis elegans.

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    Publication date
    2009-11-25T10:51:18Z
    Author
    Appleford, P.J.
    Griffiths, M
    Yao, S.Y.
    Ng, A.M.
    Chomey, E.G.
    Isaac, R.E.
    Coates, David
    Hope, I.A.
    Cass, C.E.
    Young, J.D.
    Baldwin, S.A.
    Show allShow less
    Keyword
    Caenorhabditis elegans
    Nucleoside transporters
    Eukaryote nucleoside transporters
    Transporters
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    The genome of Caenorhabditis elegans encodes multiple homologues of the two major families of mammalian equilibrative and concentrative nucleoside transporters. As part of a programme aimed at understanding the biological rationale underlying the multiplicity of eukaryote nucleoside transporters, we have now demonstrated that the nematode genes ZK809.4 (ent-1) and K09A9.3 (ent-2) encode equilibrative transporters, which we designate CeENT1 and CeENT2 respectively. These transporters resemble their human counterparts hENT1 and hENT2 in exhibiting similar broad permeant specificities for nucleosides, while differing in their permeant selectivities for nucleobases. They are insensitive to the classic inhibitors of mammalian nucleoside transport, nitrobenzylthioinosine, dilazep and draflazine, but are inhibited by the vasoactive drug dipyridamole. Use of green fluorescent protein reporter constructs indicated that the transporters are present in a limited number of locations in the adult, including intestine and pharynx. Their potential roles in these tissues were explored by using RNA interference to disrupt gene expression. Although disruption of ent-1 or ent-2 expression alone had no effect, simultaneous disruption of both genes yielded pronounced developmental defects involving the intestine and vulva.
    URI
    http://hdl.handle.net/10454/3983
    Version
    No full-text available in the repository
    Citation
    Appleford, P.J., Griffiths, M., Yao, S.Y., Ng, A.M. and Coates, D. et al. (2004). Functional Redundancy of two nucleoside transporters of the ENT family (CeENT1, CeENT2) required for development of Caenorhabditis elegans. Molecular Membrane Biology. Vol. 21, No. 4, pp. 247-259.
    Link to publisher’s version
    http://dx.doi.org/10.1080/09687680410001712550
    Type
    Article
    Collections
    Life Sciences Publications

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