Escherichia coli K-12 substr. MG1655 Reactions Class: Transport Facilitated by Channels and Pores

Reactions in this class are facilitated by a family of proteins known as channels and pores. These proteins enable the energy independent diffusion of substrates across a membrane. Generally transport is considered to occur without the need for a carrier mediated mechanism but there are exceptions to this (eg. the ligand gated fatty acid channel FadL of E. coli). In the IUBMB Transport Classification System, Channels and Pores (Family 1) contains 5 subfamilies including alpha-helical channels (1.A), beta strand porins (1.B), pore-forming toxins (1.C), non-ribosomally synthesized channels (1.D) and holins (1.E).

Parent Classes:
Transport Reactions

curlin, major subunit[periplasmic space] → curlin, major subunit[extracellular space] ,
a nucleoside[extracellular space] → a nucleoside[periplasmic space] ,
a long-chain fatty acid[extracellular space] → a long-chain fatty acid[periplasmic space] ,
hydrophilic solute or ion < 600 Da[extracellular space] → hydrophilic solute or ion < 600 Da[periplasmic space] ,
N-acetylneuraminate[extracellular space]N-acetylneuraminate[periplasmic space] ,
mono-, di-, or trisaccharide < 600 Da[extracellular space] → mono-, di-, or trisaccharide < 600 Da[periplasmic space] ,
Ni2+[periplasmic space] → Ni2+[cytosol] ,
glycine[periplasmic space] ↔ glycine[cytosol] ,
partially N-deacetylated poly-β-1,6-N-acetyl-D-glucosamine[periplasmic space] → partially N-deacetylated poly-β-1,6-N-acetyl-D-glucosamine[extracellular space] ,
N,N'-diacetylchitobiose[extracellular space]N,N'-diacetylchitobiose[periplasmic space] ,
ammonium[periplasmic space] ↔ ammonium[cytosol] ,
N-acetyl-β-neuraminate[extracellular space]N-acetyl-β-neuraminate[periplasmic space] ,
glycerol[periplasmic space] ↔ glycerol[cytosol] ,
chloride[periplasmic space] ← chloride[cytosol] ,
urea[cytosol] ↔ urea[periplasmic space] ,
DL-glyceraldehyde[periplasmic space] ↔ DL-glyceraldehyde[cytosol] ,
K+[periplasmic space] → K+[cytosol] ,
non-specific ion/solute[cytosol] → non-specific ion/solute[periplasmic space] ,
glycine betaine[extracellular space] ↔ glycine betaine[periplasmic space] ,
maltose[extracellular space] → maltose[periplasmic space] ,
non-specific ion/solute[extracellular space] → non-specific ion/solute[periplasmic space] ,
nitrite[periplasmic space] → nitrite[cytosol] ,
Mg2+[periplasmic space] → Mg2+[cytosol] ,
formate[cytosol] ↔ formate[periplasmic space] ,
H2O[periplasmic space] ↔ H2O[cytosol]

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Please cite the following article in publications resulting from the use of EcoCyc: Nucleic Acids Research 41:D605-12 2013
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