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Una posible síntesis prebiótica de la panteteína, un precursor de la coenzima A

A D Keefe¹, G L Newton, S L Miller

¹Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla 92093.

|February 23, 1995

Resumen

Los componentes de la coenzima A pueden formar panteteína, un precursor de los sistemas metabólicos de la vida temprana, a través de un simple calentamiento. Esto apoya la hipótesis del mundo del tioester que precede al mundo del ARN.

Área de la Ciencia:

Química de los prebióticos.
Los estudios sobre el origen de la vida.
La bioquímica es la bioquímica.

Sus antecedentes:

El papel de la coenzima A en las reacciones enzimáticas sugiere una importancia biológica temprana.
Sus componentes son compuestos prebióticos plausibles.
La biosíntesis de los antibióticos péptidos involucra a la coenzima A, vinculándola a la hipótesis del mundo del tioester.

Objetivo del estudio:

Investigar la síntesis prebiótica de la fracción panteteína de la coenzima A. Para investigar la síntesis prebiótica de la fracción panteteína de la coenzima A.
Explorar el potencial de los sistemas metabólicos tempranos basados en los precursores de la coenzima A.

Principales métodos:

Calentamiento de la pantoil lactona, la beta-alanina y la cisteamina a 40°C.
Analizando la síntesis de la fracción panteteína.

Principales resultados:

La fracción de panteteína sintetizada en rendimientos de varios por ciento a 40°C.
Formación de enlaces amídicos demostrada a bajas temperaturas.
Los componentes prebióticos son altamente solubles, lo que favorece la concentración en cuerpos de agua que se evaporan.

Conclusiones:

La síntesis de panteteína en condiciones suaves apoya su papel en el metabolismo temprano.
Los hallazgos proporcionan evidencia circunstancial para la hipótesis del mundo del tioester.
La coenzima A y sus precursores pueden haber sido cruciales en los primeros sistemas metabólicos.

Palabras clave:

La disciplina de la NASA es la exobiología.La Disciplina de la NASA con el número 52-20-20 La Orden de Disciplina de la NASA número 93-10-10 fue aprobada.Programa de exobiología de la NASA Programa de exobiología de la NASA.El programa de la NASA NSCORT es el programa NSCORT.No perteneciente al Centro de la NASA.

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