Dissection of Ammonium Uptake Systems inCorynebacterium glutamicum: Mechanism of Action and Energetics of AmtA and AmtB | Zendy

Britta Walter | Zendy; Melanie Küspert | Zendy; Daniel Ansorge | Zendy; Reinhard Krämer | Zendy; Andreas Burkovski | Zendy

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Dissection of Ammonium Uptake Systems inCorynebacterium glutamicum: Mechanism of Action and Energetics of AmtA and AmtB

Author(s) -

Britta Walter,

Melanie Küspert,

Daniel Ansorge,

Reinhard Krämer,

Andreas Burkovski

Publication year - 2008

Publication title -

journal of bacteriology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.652

H-Index - 246

eISSN - 1067-8832

pISSN - 0021-9193

DOI - 10.1128/jb.01896-07

Subject(s) - corynebacterium glutamicum , biology , biophysics , substrate (aquarium) , biochemistry , ammonium , gene , chemistry , ecology , organic chemistry

Corynebacterium glutamicum has two different Amt-type proteins. While AmtB has a low substrate affinity and is not saturable up to 3 mM methylammonium, AmtA has a high substrate affinity and mediates saturable, membrane potential-dependent transport, resulting in a high steady-state accumulation of methylammonium, even in the absence of metabolic trapping.

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