kyung-tai min

SIGMA(F), THE 1ST COMPARTMENT-SPECIFIC TRANSCRIPTION FACTOR OF BACILLUS-SUBTILIS, IS REGULATED BY AN ANTI-SIGMA FACTOR THAT IS ALSO A PROTEIN-KINASE

Publisher: Elsevier BV

Date: 08-1993

DOI: 10.1016/0092-8674(93)90520-Z

Abstract: The establishment of compartment-specific transcription in sporulating cells of B. subtilis is governed at the level of the activity of transcription factor sigma F. Genetic experiments have suggested that SpoIIAA and SpoIIAB, the other products of the sigma F operon, are involved in regulating sigma F activity. This activity is inhibited in the pre isional cell but specifically released from inhibition in the prespore about 1.5 hr after sporulation is induced. We now show that purified SpoIIAB inhibits transcription directed by sigma F in vitro. We note that the amino acid sequence of SpoIIAB shows some similarity to a group of bacterial histidine protein kinases, and we find that SpoIIAB is indeed a protein kinase that phosphorylates SpoIIAA on a serine residue. We suggest that this phosphorylation is responsible for the compartment-specific release of sigma F activity, perhaps through the formation of a tight complex between SpoIIAB and phosphorylated SpoIIAA.

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Location: United Kingdom of Great Britain and Northern Ireland

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National Institute Of Neurological Disorders And Stroke

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Ulsan National Institute Of Science And Technology

Location: Korea, Republic of

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Indiana University Bloomington

Location: United States of America

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Korea Advanced Institute Of Science And Technology

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California Institute Of Technology

Location: United States of America

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