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Cluster of genes that encode positive and negative elements influencing filament length in a heterocyst-forming cyanobacterium

Opened Access Cluster of genes that encode positive and negative elements influencing filament length in a heterocyst-forming cyanobacterium

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Autor: Merino Puerto, Victoria
Herrero Moreno, Antonia
Flores García, Enrique
Departamento: Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
Fecha: 2013
Publicado en: Journal of Bacteriology, 195 (17), 3957-3966.
Tipo de documento: Artículo
Resumen: The filamentous, heterocyst-forming cyanobacteria perform oxygenic photosynthesis in vegetative cells and nitrogen fixation in heterocysts, and their filaments can be hundreds of cells long. In the model heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120, the genes in the fraC-fraD-fraE operon are required for filament integrity mainly under conditions of nitrogen deprivation. The fraC operon transcript partially overlaps gene all2395, which lies in the opposite DNA strand and ends 1 bp beyond fraE. Gene all2395 produces transcripts of 1.35 kb (major transcript) and 2.2 kb (minor transcript) that overlap fraE and whose expression is dependent on the N-control transcription factor NtcA. Insertion of a gene cassette containing transcriptional terminators between fraE and all2395 prevented production of the antisense RNAs and resulted in an increased length of the cyanobacterial filaments. Deletion of all2395 resulted in a larger increase of filament length and in impaired gr...
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Cita: Merino Puerto, V., Herrero, A. y Flores García, E. (2013). Cluster of genes that encode positive and negative elements influencing filament length in a heterocyst-forming cyanobacterium. Journal of Bacteriology, 195 (17), 3957-3966.
Tamaño: 2.371Mb
Formato: PDF

URI: http://hdl.handle.net/11441/62808

DOI: 10.1128/JB.00181-13

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