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Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies
Published on: March 6, 2013
Estructura primaria del receptor humano de transferrina deducida de la secuencia de ARNm
Nature
|October 18, 1984
Resumen
Este estudio detalla el receptor humano de la transferrina.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- La bioquímica es la bioquímica.
- Biología celular Biología celular.
Sus antecedentes:
- Los vertebrados utilizan la proteína portadora transferrina para la absorción de hierro.
- La transferrina se une a su receptor, iniciando la internalización del complejo receptor-ligando a través de fosas recubiertas.
- El receptor de transferrina es una glicoproteína transmembrana con un peso molecular de 180.000, compuesta por dos subunidades unidas a disulfuro.
Objetivo del estudio:
- Para determinar la secuencia de nucleótidos de la región de codificación del receptor de transferrina humana del ARNm.
- Para deducir la secuencia de aminoácidos de la proteína receptora de transferrina humana.
Principales métodos:
- Secuenciación de nucleótidos del ARNm del receptor de transferrina humano.
- Deducción de la secuencia de aminoácidos a partir de datos de la secuencia de ARNm.
Principales resultados:
- Se determinó la secuencia de codificación del ARNm del receptor humano de transferrina.
- Se dedujo la secuencia de aminoácidos de la proteína del receptor de transferrina.
- El receptor carece de un péptido de señal N-terminal y posee un segmento de 62 aminoácidos que abarca la membrana desde el N-terminal.
Conclusiones:
- El receptor de transferrina tiene una configuración inusual con un pequeño dominio citoplasmático N-terminal.
- El receptor presenta un gran dominio extracelular C-terminal de 672 aminoácidos.
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