Protein Domain : Profilin IPR005455

Type  Family
Description  This entry represents the Profilin family, which are small eukaryotic proteins that have different functions. In plants, they are major allergens present in pollens [ ].The majority of the Profilin family members binds to monomeric actin (G-actin) in a 1:1 ratio thus preventing the polymerisation of actin into filaments (F-actin). They can also in certain circumstance promote actin polymerisation [ ]. However, some Profilin family members, such as Profilin4 from mammals, does not binds to actin and may have functions distinct from regulating actin dynamics []. It plays a role in the assembly of branched actin filament networks, by activating WASP via binding to WASP's proline rich domain []. Profilin may link the cytoskeleton with major signalling pathways by interacting with components of the phosphatidylinositol cycle and Ras pathway [, ].This entry also includes Asgard archaea profilins (Thor profilin, Loki profilin-1 and Loki profilin-2), which bind to actin and regulate the structure of the cytoskeleton. This indicates that Asgard archaea have a functional eukaryotic-like actin machinery [ ].Some Profilins can also bind to polyphosphoinositides such as PIP2 [ ]. Overall sequence similarity among profilin from organisms which belong to different phyla (ranging from fungi to mammals) is low, but the N-terminal region is relatively well conserved. The N-terminal region is thought to be involved in actin binding.
Short Name  PFN

2 Child Features

2 Gene Families

42 Genes

1 Ontology Annotations

0 Parent Features

4 Publications

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