Exchange of precursor-specific elements between Pro-sigma E and Pro-sigma K of Bacillus subtilis.
J Bacteriol
; 178(2): 546-9, 1996 Jan.
Article
en En
| MEDLINE
| ID: mdl-8550479
ABSTRACT
sigma E and sigma K are sporulation-specific sigma factors of Bacillus subtilis that are synthesized as inactive proproteins. Pro-sigma E and pro-sigma K are activated by the removal of 27 and 20 amino acids, respectively, from their amino termini. To explore the properties of the precursor-specific sequences, we exchanged the coding elements for these domains in the sigma E and sigma K structural genes and determined the properties of the resulting chimeric proteins in B. subtilis. The pro-sigma E-sigma K chimera accumulated and was cleaved into active sigma K, while the pro-sigma K-sigma E fusion protein failed to accumulate and is likely unstable in B. subtilis. A fusion of the sigE "pro" sequence to an unrelated protein (bovine rhodanese) also formed a protein that was cleaved by the pro-sigma E processing apparatus. The data suggest that the sigma E pro sequence contains sufficient information for pro-sigma E processing as well as a unique quality needed for sigma E accumulation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Precursores de Proteínas
/
Factor sigma
/
Bacillus subtilis
/
Factores de Transcripción
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ADN Bacteriano
Límite:
Animals
Idioma:
En
Revista:
J Bacteriol
Año:
1996
Tipo del documento:
Article
País de afiliación:
Estados Unidos