amtB:Quickview: Difference between revisions

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!align=left {{table_heading_style}} |Standard Name
!align=left |Standard Name
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''amtB''  
''amtB''  
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!align=left {{table_heading_style}} |Gene Synonym(s)
!align=left |Gene Synonym(s)
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''ECK0445, b0451, JW0441, ybaG''<ref name='LIB:Riley_2006'/>
''ECK0445, b0451, JW0441, ybaG''<ref name='LIB:Riley_2006'/>
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!align=left {{table_heading_style}} |Product Desc.
!align=left |Product Desc.
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AmtB ammonium Amt transporter<ref name='LIB:EcoCyc10.6'/>; AmtB<ref name='LIB:EcoCyc11.1'/>;  
AmtB ammonium Amt transporter<ref name='LIB:EcoCyc10.6'/>; AmtB<ref name='LIB:EcoCyc11.1'/>;  
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Ammonia gas channel; sequesters GlnK, a negative regulator of AmtB activity, to the inner membrane; bi-directional facilitated diffusion<ref name='LIB:EcoGene'/>
Ammonia gas channel; sequesters GlnK, a negative regulator of AmtB activity, to the inner membrane; bi-directional facilitated diffusion<ref name='LIB:EcoGene'/>
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!align=left {{table_heading_style}} |Product Synonyms(s)
!align=left |Product Synonyms(s)
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ammonium transporter<ref name='LIB:Riley_2006'/>, B0451<ref name='LIB:EcoCyc10.6'/><ref name='LIB:Riley_2006'/>, YbaG<ref name='LIB:EcoCyc10.6'/><ref name='LIB:Riley_2006'/>, AmtB<ref name='LIB:EcoCyc10.6'/><ref name='LIB:Riley_2006'/>, AmtB ammonium Amt transporter<ref name='LIB:EcoCyc11.1'/><ref name='LIB:Riley_2006'/>  
ammonium transporter<ref name='LIB:Riley_2006'/>, B0451<ref name='LIB:EcoCyc10.6'/><ref name='LIB:Riley_2006'/>, YbaG<ref name='LIB:EcoCyc10.6'/><ref name='LIB:Riley_2006'/>, AmtB<ref name='LIB:EcoCyc10.6'/><ref name='LIB:Riley_2006'/>, AmtB ammonium Amt transporter<ref name='LIB:EcoCyc11.1'/><ref name='LIB:Riley_2006'/>  
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!align=left {{table_heading_style}} |Knock-Out Phenotype
!align=left |Knock-Out Phenotype
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!align=left {{table_heading_style}} |Regulation/Expression
!align=left |Regulation/Expression
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transcription unit(s): [[:Category:Txn_unit:glnK-amtB|glnK-amtB]]<ref name='LIB:EcoCyc10.6'/>  
transcription unit(s): [[:Category:Txn_unit:glnK-amtB|glnK-amtB]]<ref name='LIB:EcoCyc10.6'/>  
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!align=left {{table_heading_style}} |Regulation/Activity
!align=left |Regulation/Activity
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Revision as of 00:00, 9 January 2010

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

See Help:Quickview for help with entering information in the Quickview table.

Standard Name

amtB

Gene Synonym(s)

ECK0445, b0451, JW0441, ybaG[1]

Product Desc.

AmtB ammonium Amt transporter[2]; AmtB[3];

Component of ammonium Amt transporter[3]

Ammonia gas channel; sequesters GlnK, a negative regulator of AmtB activity, to the inner membrane; bi-directional facilitated diffusion[4]

Product Synonyms(s)

ammonium transporter[1], B0451[2][1], YbaG[2][1], AmtB[2][1], AmtB ammonium Amt transporter[3][1]

Knock-Out Phenotype
Regulation/Expression

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

Regulation/Activity


edit table

See Help:Quickview for help with entering information in the Quickview table.

Notes

[back to top]


AmtB is a trimeric inner membrane protein. Each subunit has 11 TM helices; a predicted N-terminal 12th TM helix is actually a cleaved signal peptide. Ammonium is proposed to bind to the periplasmic face of AmtB and then to be deprotonated to ammonia for diffusion through the AmtB channel, then reprotonated by water to hydrate the ammonia gas to ammonium ion in the cytoplasm. AmtB enables growth on ammonium as sole nitrogen source at low ammonium ion concentrations (Soupene, 1998). The human Rh proteins are AmtB homologs and have been variously proposed to act as ammonia channels or as carbon dioxide gas channels.[4]



References

[back to top]


  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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 2.4 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  3. ↑ 3.0 3.1 3.2 EcoCyc (release 11.1; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  4. ↑ 4.0 4.1 EcoGene: Rudd, KE (2000) EcoGene: a genome sequence database for Escherichia coli K-12. Nucleic Acids Res 28:60-4.
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