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===Notes===
===Notes===
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glnK is a glnB paralog. Like GlnB, the GlnK protein is a member of the trimeric PII signal transduction protein family. In nitrogen limitation it is subject to post-translational modification by uridylylation (mediated by GlnD) of Tyr51 in the T-loop of each subunit. This modification is reversed in N-sufficient conditions.  In ammonium sufficient conditions non-uridylylated GlnK forms a 1:1 complex with the ammonia channel protein AmtB and prevents ammonium uptake through AmtB.  Complex formation is reversed by ammonium starvation. [Comment provided by EcoTeam member Mike Merrick, 11.16.06]<ref name='LIB:EcoGene'/>





Revision as of 01:58, 3 March 2009

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Quickview   Gene   Gene Product(s)   Expression   Evolution   On One Page    
References Suggestions
Gene Name

glnK (synonyms: ECK0444, b0450, JW0440, ybaI)[1]

Product(s)

GlnK product, GlnK product[1][2]: B0450 product, YbaI product, unmodified protein PII 2 product, [protein PII2] product, PII2 product

Description

[GlnK][2][3]

Component of nitrogen regulatory protein GlnK[2]

Knock-Out Phenotype
Regulation/Expression

transcription unit(s): glnK-amtB[2]

Regulation/Activity


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Notes

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glnK is a glnB paralog. Like GlnB, the GlnK protein is a member of the trimeric PII signal transduction protein family. In nitrogen limitation it is subject to post-translational modification by uridylylation (mediated by GlnD) of Tyr51 in the T-loop of each subunit. This modification is reversed in N-sufficient conditions. In ammonium sufficient conditions non-uridylylated GlnK forms a 1:1 complex with the ammonia channel protein AmtB and prevents ammonium uptake through AmtB. Complex formation is reversed by ammonium starvation. [Comment provided by EcoTeam member Mike Merrick, 11.16.06][4]



References

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  1. ↑ 1.0 1.1 Riley, M. et al. (2006) Nucleic Acids Res 34:1-6 (corrected supplemental data from B. Wanner)
  2. ↑ 2.0 2.1 2.2 2.3 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  3. ↑ EcoCyc (release 11.1; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  4. ↑ EcoGene: Rudd, KE (2000) EcoGene: a genome sequence database for Escherichia coli K-12. Nucleic Acids Res 28:60-4.