Characterization and mapping of an informational suppressor in Aspergillus nidulans

The present work was undertaken to characterize a suppressor gene present in a mutant strain of A. nidulans obtained with NTG (N-Methyl-N'-Nitro-N-Nitrosoguanidine). Analyses of this mutant have shown that this suppressor, designated suO1, induces phenotypic co-reversion of several auxotrophic...

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Autores principales:	GRACITE DE MELO FRANZONI,MELISSA, ALVES DE CASTRO-PRADO,MARIALBA AVEZUM
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2000
Materias:	Aspergillus nidulans barren cleistothecia informational suppressor paromomycin
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100008
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spelling	oai:scielo:S0716-976020000001000082000-11-27Characterization and mapping of an informational suppressor in Aspergillus nidulansGRACITE DE MELO FRANZONI,MELISSAALVES DE CASTRO-PRADO,MARIALBA AVEZUM Aspergillus nidulans barren cleistothecia informational suppressor paromomycin The present work was undertaken to characterize a suppressor gene present in a mutant strain of A. nidulans obtained with NTG (N-Methyl-N'-Nitro-N-Nitrosoguanidine). Analyses of this mutant have shown that this suppressor, designated suO1, induces phenotypic co-reversion of several auxotrophic mutations and makes the strain sensitive to aminoglycoside antibiotics and lower temperatures. suO1 has shown to be on linkage group VIII. The vegetative growth of the mutant strain is very unstable because the suppressor gene induces the production of prototrophic mitotic sectors. The strains bearing the suO1 gene produce cleistothecia containing a reduced number of viable ascospores during the sexual cycle. The segregation of the genetic markers has also been observed in the mutant strain self crossed. From the above results it may be concluded that suO1 is an informational suppressorinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.33 n.1 20002000-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100008en10.4067/S0716-97602000000100008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Aspergillus nidulans barren cleistothecia informational suppressor paromomycin
spellingShingle	Aspergillus nidulans barren cleistothecia informational suppressor paromomycin GRACITE DE MELO FRANZONI,MELISSA ALVES DE CASTRO-PRADO,MARIALBA AVEZUM Characterization and mapping of an informational suppressor in Aspergillus nidulans
description	The present work was undertaken to characterize a suppressor gene present in a mutant strain of A. nidulans obtained with NTG (N-Methyl-N'-Nitro-N-Nitrosoguanidine). Analyses of this mutant have shown that this suppressor, designated suO1, induces phenotypic co-reversion of several auxotrophic mutations and makes the strain sensitive to aminoglycoside antibiotics and lower temperatures. suO1 has shown to be on linkage group VIII. The vegetative growth of the mutant strain is very unstable because the suppressor gene induces the production of prototrophic mitotic sectors. The strains bearing the suO1 gene produce cleistothecia containing a reduced number of viable ascospores during the sexual cycle. The segregation of the genetic markers has also been observed in the mutant strain self crossed. From the above results it may be concluded that suO1 is an informational suppressor
author	GRACITE DE MELO FRANZONI,MELISSA ALVES DE CASTRO-PRADO,MARIALBA AVEZUM
author_facet	GRACITE DE MELO FRANZONI,MELISSA ALVES DE CASTRO-PRADO,MARIALBA AVEZUM
author_sort	GRACITE DE MELO FRANZONI,MELISSA
title	Characterization and mapping of an informational suppressor in Aspergillus nidulans
title_short	Characterization and mapping of an informational suppressor in Aspergillus nidulans
title_full	Characterization and mapping of an informational suppressor in Aspergillus nidulans
title_fullStr	Characterization and mapping of an informational suppressor in Aspergillus nidulans
title_full_unstemmed	Characterization and mapping of an informational suppressor in Aspergillus nidulans
title_sort	characterization and mapping of an informational suppressor in aspergillus nidulans
publisher	Sociedad de Biología de Chile
publishDate	2000
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100008
work_keys_str_mv	AT gracitedemelofranzonimelissa characterizationandmappingofaninformationalsuppressorinaspergillusnidulans AT alvesdecastropradomarialbaavezum characterizationandmappingofaninformationalsuppressorinaspergillusnidulans
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Characterization and mapping of an informational suppressor in Aspergillus nidulans

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