SMART: Pfam domain BAR

The domain within your query sequence starts at position 1 and ends at position 144; the E-value for the BAR_2 domain shown below is 1.8e-6.

RNFIEGDYKTIAKERKLLQNKRLDLDAAKTRLKKAKAAETKSSQLNSARPEGDNIMVNFS
YMLNFLHVKWLKIWAEEVTKSEQELRITQSEFDRQAEITRLLLEGISSTHAHHLRCLNDF
VEAQMTYYAQCYQYMLDLQKQLGS

BAR_2

PFAM accession number:	PF10455
Interpro abstract (IPR018859):	Endocytosis and intracellular transport involve several mechanistic steps: (1) for the internalisation of cargo molecules, the membrane needs to bend to form a vesicular structure, which requires membrane curvature and a rearrangement of the cytoskeleton; (2) following its formation, the vesicle has to be pinched off the membrane; (3) the cargo has to be subsequently transported through the cell and the vesicle must fuse with the correct cellular compartment. Members of the Amphiphysin protein family are key regulators in the early steps of endocytosis, involved in the formation of clathrin-coated vesicles by promoting the assembly of a protein complex at the plasma membrane and directly assist in the induction of the high curvature of the membrane at the neck of the vesicle. Amphiphysins contain a characteristic domain, known as the BAR (Bin-Amphiphysin-Rvs)-domain, which is required for their in vivo function and their ability to tubulate membranes [ (PUBMED:14993925) ]. The crystal structure of these proteins suggest the domain forms a crescent-shaped dimer of a three-helix coiled coil with a characteristic set of conserved hydrophobic, aromatic and hydrophilic amino acids. Proteins containing this domain have been shown to homodimerise, heterodimerise or, in a few cases, interact with small GTPases. This entry identifies several fungal BAR domain-containing proteins, such as Gvp36, that are not detected by IPR004148 [ (PUBMED:18156177) ].

PFAM accession number:

PF10455

Interpro abstract (IPR018859):

Endocytosis and intracellular transport involve several mechanistic steps:

(1) for the internalisation of cargo molecules, the membrane needs to bend to form a vesicular structure, which requires membrane curvature and a rearrangement of the cytoskeleton;
(2) following its formation, the vesicle has to be pinched off the membrane;
(3) the cargo has to be subsequently transported through the cell and the vesicle must fuse with the correct cellular compartment.

Members of the Amphiphysin protein family are key regulators in the early steps of endocytosis, involved in the formation of clathrin-coated vesicles by promoting the assembly of a protein complex at the plasma membrane and directly assist in the induction of the high curvature of the membrane at the neck of the vesicle. Amphiphysins contain a characteristic domain, known as the BAR (Bin-Amphiphysin-Rvs)-domain, which is required for their in vivo function and their ability to tubulate membranes [ (PUBMED:14993925) ].

The crystal structure of these proteins suggest the domain forms a crescent-shaped dimer of a three-helix coiled coil with a characteristic set of conserved hydrophobic, aromatic and hydrophilic amino acids. Proteins containing this domain have been shown to homodimerise, heterodimerise or, in a few cases, interact with small GTPases.

This entry identifies several fungal BAR domain-containing proteins, such as Gvp36, that are not detected by IPR004148 [ (PUBMED:18156177) ].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry BAR_2