IAL   21557
INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Characterization of Arabidopsis genes encoding cytochrome c oxidase assembly factors
Autor/es:
CAROLINA V. ATTALLAH, ELINA WELCHEN, RAÚL N. COMELLI Y DANIEL H. GONZÁLEZ
Lugar:
Villa Carlos Paz, Córdoba, Argentina
Reunión:
Congreso; XLIV Reunión Anual de la Sociedad Argentina de Investigación en Bioquímica y Biología Molecular; 2008
Institución organizadora:
Sociedad Argentina de Investigación en Bioquímica y Biología Molecular (SAIB)
Resumen:
<!-- /* Font Definitions */ @font-face {font-family:Times-Italic; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-charset:0; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:auto; mso-font-signature:3 0 0 0 1 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES-TRAD; mso-fareast-language:ES-TRAD;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} -->
<!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-alt:宋体;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-pitch:variable;
mso-font-signature:3 135135232 16 0 262145 0;}
@font-face
{font-family:"\@SimSun";
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-pitch:variable;
mso-font-signature:3 135135232 16 0 262145 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0cm;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:12.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:SimSun;
mso-ansi-language:EN-GB;}
@page Section1
{size:595.3pt 841.9pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;
mso-header-margin:35.4pt;
mso-footer-margin:35.4pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
The biogenesis of cytochrome c oxidase (COX)
requires accesory proteins, including COX11, COX17, and SCO1, that have been
implicated in copper metallation of two COX subunits. Another protein, COX19,
is essential for COX biogenesis but its exact function is unknown. Based on
structural similarities with COX17, it has also been implicated in metal
transport. The Arabidopsis genome contains one AtCOX11 gene and
two genes for each AtCOX17, AtCOX19, and AtSCO1. It is noteworthy that AtCOX11,
AtCOX17 and AtCOX19 genes contain an intron located near the
translation start site and share certain motifs in their promoter proximal
regions. Expression of AtCOX17 and AtCOX19 genes was localized
preferentially in young roots, anthers and siliques and was induced by different
treatments that produce oxidative stress in plants. Expression of these genes
was completely dependent on the presence of the intron and site II motifs
located around -200 from the translation start site. For AtCOX11,
similar expression patterns were observed, but induction by stress and
dependence on the intron and site II motifs was not evident. Our results
indicate that, in addition to the structural similarities observed for COX17
and COX19 proteins, the expression mechanisms of these genes are highly
conserved. This further supports the view that these copper chaperones have
closely related functions in COX assembly.