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The functional domains of dopamine transporter for cocaine analog, CFT binding
Experimental & Molecular Medicine ; : 90-94, 2002.
Artigo em Inglês | WPRIM | ID: wpr-228522
ABSTRACT
Cocaine analogue, CFT (2beta-carbomethoxy-3beta-(4-fluorophenyl) tropane) binding to dopamine transporter (DAT) in different species is quite heterogeneous. CFT is scarcely detected in bovine DAT whereas it is conspicuous in humans. To examine the structural basis for this functional discrepancy, we analyzed transporter chimeras of these two DATs. The CFT binding activities are avid in all of the chimeric DATs of which both of the 3rd and the 6-8th transmembrane domain (TM) are composed of human DAT sequences. On the contrary, CFT binding activities were scarcely detected if either or both of two regions are replaced with bovine sequences. These findings indicate that the CFT binding absolutely requires human DAT sequences, at least, in the regions encompassing the 3rd and 6-8th transmembrane domain (TM), and that these regions might contribute to form the 3-dimensional pocket for CFT binding.
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Proteínas de Membrana Transportadoras / Ligação Proteica / Proteínas Recombinantes de Fusão / Estrutura Terciária de Proteína / Cocaína / Animais Limite: Animais / Humanos Idioma: Inglês Revista: Experimental & Molecular Medicine Ano de publicação: 2002 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Proteínas de Membrana Transportadoras / Ligação Proteica / Proteínas Recombinantes de Fusão / Estrutura Terciária de Proteína / Cocaína / Animais Limite: Animais / Humanos Idioma: Inglês Revista: Experimental & Molecular Medicine Ano de publicação: 2002 Tipo de documento: Artigo