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Functional characterization of neuro...

Umesh, Anita.

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Functional characterization of neurotransmitter transporters from the insects, Aedes aegypti and Manduca sexta.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Functional characterization of neurotransmitter transporters from the insects, Aedes aegypti and Manduca sexta./
作者:	Umesh, Anita.
面頁冊數:	211 p.
附註:	Chairperson: Sarjeet S. Gill.
Contained By:	Dissertation Abstracts International63-11B.
標題:	Biology, Molecular. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3071461
ISBN:	0493912932

Functional characterization of neurotransmitter transporters from the insects, Aedes aegypti and Manduca sexta.
Umesh, Anita.

Functional characterization of neurotransmitter transporters from the insects, Aedes aegypti and Manduca sexta. - 211 p.

Chairperson: Sarjeet S. Gill.

Thesis (Ph.D.)--University of California, Riverside, 2002.

Collectively, this thesis provides the nature of the chemical architecture of the insect nervous system from the standpoint of proteins involved in transporting the neurotransmitters.

ISBN: 0493912932Subjects--Topical Terms:

1017719
Biology, Molecular.

Functional characterization of neurotransmitter transporters from the insects, Aedes aegypti and Manduca sexta.
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245 1 0 $a Functional characterization of neurotransmitter transporters from the insects, Aedes aegypti and Manduca sexta.
300 $a 211 p.
500 $a Chairperson: Sarjeet S. Gill.
500 $a Source: Dissertation Abstracts International, Volume: 63-11, Section: B, page: 5095.
502 $a Thesis (Ph.D.)--University of California, Riverside, 2002.
520 $a Collectively, this thesis provides the nature of the chemical architecture of the insect nervous system from the standpoint of proteins involved in transporting the neurotransmitters.
520 $a In an attempt to probe insect neurotransmission at a molecular level, neurotransmitter transporters from the mosquito <italic>Aedes aegypti</italic> and tobacco hornworm <italic>Manduca sexta</italic> were isolated and characterized with regards to localization, function, pharmacology, and electrophysiology. Three classes of neurotransmitter transporters were studied: (1) a <italic> M. sexta</italic> γ-aminobutyric acid (GABA) transporter (MasGAT) belonging to the Na<super>+</super>/Cl<super>−</super> dependent plasma membrane transporter family, (2) an <italic>Ae. aegypti</italic> excitatory amino acid (EAAT) transporter (AeaEAAT), falling under the Na<super>+</super>/K<super> +</super> dependent plasma membrane transporter family, and (3) a <italic> M. sexta</italic> vesicular acetylcholine transporter homologue, a part of the vesicular monoamine family of transporters.
520 $a Immunocytochemical localization of MasGAT using a specific antibody to a variable region of the protein, demonstrated abundance in the neuropile regions of the brain and ganglia throughout the course of development. Immunoreactivity was evident from as early as the second-day embryo, and sustained through adulthood. It strongly mirrored the staining pattern for GABA in <italic> M. sexta</italic> as well as for the GABA receptor subunits in <italic>D. melanogaster</italic> that had been previously observed.
520 $a A thorough functional characterization of AeaEAAT, having 40–50% identity to other known EAATs from both vertebrates and invertebrates, demonstrated it as the functional homologue of human EAAT3. It transported L-glutamate, L- and D-aspartate with high affinity, and exhibited current responses to application of L-cysteine, L-glutamine, and L-asparagine. Like its mammalian homologues, AeaEAAT of mediated a substrate-elicited anion conductance that was not required for functional substrate transport. Studies into the localization of this protein illustrated highest levels in the adult thorax, particularly in the thoracic ganglia.
520 $a Finally, an antibody was developed to a variable region of the cloned MasVTR to localize cholinergic cells in <italic>M. sexta</italic>. MasVTR had 40–50% amino acid identity to characterized vertebrate acetylcholine transporters, with ca. 70% identity to a <italic>D. melanogaster</italic> homologue. Immunolocalization of the larval 5<super>th</super> instar ventral nerve cord showed staining of discreet cell clusters in the brain and thoracic ganglia.
590 $a School code: 0032.
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Biology, Neuroscience. $3 1017680
650 4 $a Health Sciences, Toxicology. $3 1017752
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791 $a Ph.D.
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