FixK₂, a key regulator in Bradyrhizobium japonicum, is a substrate for the protease ClpAP in vitro.

Abstract:

:FixK₂ is a CRP-like transcription factor that controls the endosymbiotic lifestyle of Bradyrhizobium japonicum. The reason for its noticeable protease sensitivity was explored here. The repertoire of Clp chaperone-proteases in B. japonicum was examined, and specifically ClpAP₁ and ClpXP₁ were purified and tested. FixK₂ was found to be degraded by ClpAP₁ but not by ClpXP₁. Degradation was inhibited by the ClpS₁ adaptor protein, indicating that FixK₂ is a direct substrate for ClpAP₁. The last 12 amino acids of FixK₂ appeared to be recognized by ClpA. The results suggest that the ClpAP system is involved in the cellular turnover of FixK₂.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Bonnet M,Stegmann M,Maglica Ž,Stiegeler E,Weber-Ban E,Hennecke H,Mesa S

doi

10.1016/j.febslet.2012.11.014

subject

Has Abstract

pub_date

2013-01-04 00:00:00

pages

88-93

issue

1

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(12)00873-3

journal_volume

587

pub_type

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