OBSOLETE. Plasmid-encoded bacteriocins which are produced by enteric bacteria. Exert a lethal effect on other bacteria including E. coli strains that lack the Col plasmid. Bind to a cell surface receptor and are transported into the periplasm via an energy-dependent process involving a TonB- or TolA-dependent hetero-oligomeric protein complex. Some colicins kill their target cell by inserting into the cytoplasmic membrane where they form voltage-sensitive (trans-negative) channels that depolarize and deenergize the cell, and thereby kill it.

OBSOLETE. An agent that can lyse cells.

OBSOLETE. An agent that can lyse the cell in which it is synthesized.

Combining with an acetylcholine receptor ligand and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity.

OBSOLETE. (Was not defined before being made obsolete).

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: ATP + H2O + protein(out) = ADP + phosphate + protein(in).

Enables the transfer of oligosaccharide, sized less than 1000 Da, from one side of a membrane to the other. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.

OBSOLETE. (Was not defined before being made obsolete).

Enables the transfer of hemaglutinin from the periplasm to the external milieu; the hemaglutinin and the porin are the N- and C-terminal regions of the same protein, respectively.

Transports a passenger protein from the periplasm to the external milieu; the passenger protein and the porin are the N- and C-terminal regions of the same protein, respectively.

OBSOLETE. A porin of the bacterial outer membrane that forms transmembrane pores and transports relatively large molecules from the external milieu to the periplasm in an energized process. Energizing of transport across the outer membrane requires a heterotrimeric complex of proteins, the TonB-ExbB-ExbD complex, or in some cases, the TolA-TolQ-TolR complex. Energizing requires proton motive force across the cytoplasmic membrane.

Enables the transfer of adhesin from the periplasm to the external milieu; the adhesin and the porin are the N- and C-terminal regions of the same protein, respectively.

OBSOLETE. Assists in the correct assembly of fimbria, extracellular organelles that are used to attach a bacterial cell to a surface, but is not a component of the fimbrium when performing its normal biological function.

A porin that acts in the assembly of fimbria together with fimbrial chaperone.

OBSOLETE. Polypeptide antibiotic secreted by bacteria and able to kill bacteria of susceptible strains after absorption by specific cell surface receptor.

Enables the energy independent passage of nucleoside, sized less than 1000 Da, across a membrane. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.

Enables the transfer of melibiose from one side of a membrane to the other. Melibiose is the disaccharide 6-O-alpha-D-galactopyranosyl-D-glucose and occurs as a constituent of the trisaccharide raffinose or in the exudates and nectaries of a number of plants.

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: glucuronide(out) + monovalent cation(out) = glucuronide(in) + monovalent cation(in).