An iron stress operon involved in photosynthetic electron transport in the marine cyanobacterium Synechococcus sp. PCC 7002.
J Gen Microbiol
; 138 Pt 8: 1613-21, 1992 Aug.
Article
en En
| MEDLINE
| ID: mdl-1527503
The iron-stress-induced genes isiA and isiB have been cloned and sequenced from the marine unicellular cyanobacterium Synechococcus sp. PCC 7002. These genes code for a photosystem II chlorophyll-binding protein and flavodoxin respectively. The genes form a dicistronic operon that is transcriptionally activated under iron-stress conditions to produce an abundant monocistronic message containing isiA and a much less abundant dicistronic message that also contains isiB. The arrangement of these genes, their transcriptional control and the relative abundance of the monocistronic and dicistronic messages produced under iron stress parallels the pattern shown by the freshwater cyanobacterium Synechococcus sp. PCC 7942. The genes for the corresponding proteins found under iron-replete conditions, CP-43 and ferredoxin, have also been cloned and sequenced. Northern blot analysis indicates that both of these genes are constitutively expressed under both iron-stress and iron-replete conditions.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Operón
/
Fotosíntesis
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Proteínas Bacterianas
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Proteínas Portadoras
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Cianobacterias
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Complejos de Proteína Captadores de Luz
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Ferredoxinas
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Flavodoxina
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Hierro
Idioma:
En
Revista:
J Gen Microbiol
Año:
1992
Tipo del documento:
Article
País de afiliación:
Canadá
Pais de publicación:
Reino Unido