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References Suggestions


Standard Name


Gene Synonym(s)

ECK1326, b1329, JW1322, ynaH[1], ynaH

Product Desc.

periplasmic murein tripeptide binding protein[2][3];

Component of Murein Tripeptide ABC Transporter[3]

Murein tripeptide/heme transport, periplasmic binding protein; L-ala-gamma-D-glutamyl-meso-DAP binding protein; feeds into the Dpp (heme)and Opp (murein peptide) transport systems[4]

Product Synonyms(s)

murein tripeptide (L-ala-gamma-D-glutamyl-meso-DAP) transporter subunit[1], periplasmic-binding component of ABC superfamily[1], B1329[2][1], YnaH[2][1], MppA[2][1] , ECK1326, JW1322, ynaH, b1329

Function from GO

<GO_nr />

Knock-Out Phenotype

transcription unit(s): mppA[2]

Quick Links

porteco.png EcoCyc.gif regulondb.jpg

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E. coli does not normally use exogeneous heme, but heme can be utilized if a foreign OM heme receptor is expressed in E. coli; heme and tripeptides compete for the same binding site; DppA is an alternative heme periplasmic binding protein; MppA or DppA is required for the uptake of 5-aminolevulinic acid (Letoffe, 2006).[4]


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  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 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.