Uridylylation of the PII protein from Herbaspirillum seropedicae.

Abstract:

:The PII protein is apparently involved in the control of NifA activity in Herbaspirillum seropedicae. To evaluate the probable role of PII in signal transduction, uridylylation assays were conducted with purified H. seropedicae PII and Escherichia coli GlnD, or a cell-free extract of H. seropedicae as sources of uridylylating activity. The results showed that alpha-ketoglutarate and ATP stimulate uridylylation whereas glutamine inhibits uridylylation. Deuridylylation of PII-UMP was dependent on glutamine and inhibited by ATP and alpha-ketoglutarate. PII uridylylation and (or) deuridylylation in response to these effectors suggests that PII is a nitrogen level signal transducer in H. seropedicae.

journal_name

Can J Microbiol

authors

Benelli EM,Buck M,de Souza EM,Yates MG,Pedrosa FO

doi

10.1139/w01-018

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

309-14

issue

4

eissn

0008-4166

issn

1480-3275

journal_volume

47

pub_type

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