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secretin N-terminal domain-containing protein
This is a short, often repeated, domain found in bacterial type II/III secretory system proteins. All previous NolW-like domains fall into this family. (from Pfam)
Bacterial type II and III secretion system protein
DNA uptake porin HofQ
DNA uptake porin HofQ is required for the use of extracellular DNA as a nutrient
HofQ, as found in Escherichia coli, belongs to the family of the type IV pilus secretin (outer membrane channel protein) PilQ. It belongs to a system that enables the uptake of DNA as a nutrient and resembles an incomplete system of competence for transformation.
type IV pilus secretin PilQ
PilQ is a secretin (an outer membrane complex formation protein required for secretion) of type 4 pilus assembly. The family also includes proteins of competence system for transformation by exogenous DNA, where the competence system may transport machinery may derive from an incomplete type 4 pilus system. The system also includes HofQ from Escherichia coli, part of an apparent incomplete competence system in which DNA is imported as a carbon source rather than for transformation. PilQ shows homology to secretins of type 2 and type 3 secretion.
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