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Genomic Transformation of the Picoeukaryote Ostreococcus tauri
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Proteorhodopsina transferencia lateral de genes entre las bacterias planctónicas marinas y las arqueas
Niels-Ulrik Frigaard1, Asuncion Martinez, Tracy J Mincer
1Department of Civil and Environmental Engineering and Division of Biological Engineering, Massachusetts Institute of Technology, Building 48, 15 Vassar Street, Cambridge, Massachusetts 02139, USA.
Nature
|February 17, 2006
Resumen
Una nueva investigación revela arqueas en el océano.
Área de la Ciencia:
- Ecología microbiana Ecología microbiana.
- Biología Molecular Biología Molecular
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- Los microorganismos planctónicos, incluidas las bacterias, arqueas y eucariotas, habitan en la zona fótica del océano.
- Las proteorhodopsinas son proteínas activadas por la luz en las bacterias, que ayudan al metabolismo energético a través de la translocación de protones.
- Estudios previos documentaron genes de proteorhodopsina principalmente en proteobacterias.
Objetivo del estudio:
- Para investigar la presencia y distribución de los genes de proteorhodopsina en las arqueas marinas.
- Para explorar la historia evolutiva y la transferencia de genes de proteorhodopsina entre dominios microbianos.
Principales métodos:
- Análisis genómico de las comunidades microbianas planctónicas.
- Análisis filogenético de los genes de la proteorhodopsina.
- Investigando el contexto genómico de las proteorhodopsinas arqueológicas.
Principales resultados:
- Los genes de la proteorhodopsina fueron identificados en arqueas del orden de los termoplasmáticos en la zona fótica del océano.
- La evidencia sugiere la transferencia lateral de genes de proteorhodopsinas entre las bacterias planctónicas y las arqueas.
- Aproximadamente el 10% de los euryarqueotas de la zona fótica poseían el gen proteorhodopsina, a menudo cerca de los genes de ARN ribosomal.
Conclusiones:
- La amplia distribución de las proteorhodopsinas indica importantes ventajas para la salud dependientes de la luz.
- La transferencia génica lateral y la restricción de la zona fótica resaltan la importancia adaptativa de estas fotoproteínas.
- Las proteorhodopsinas juegan un papel crucial en la adaptación microbiana a los ambientes marinos ricos en luz.
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