The SCARB1 protein, which is encoded in the region of chromosome 12q24.31, has been implicated in the transfer of alpha-tocopherol from HDL to tissues (29).
Alpha synuclein accumulation within astrocytes has been observed in the brains of Parkinson's disease patients and in vitro [ 28], where direct transfer of alpha-synuclein from neurons to astrocytes has been observed [ 29].
One of the most intriguing of these is the transfer of eukaryotic alpha- and beta-tubulin subunits to the bacterium Prosthecobacter [ 5, 6].
Horizontal gene transfer to alpha proteobacteria is proposed [ 12].
Indeed, recent evidence supports the potential transfer of pathogenic alpha-synuclein from the intestine to the DMN via the vagus nerve (Holmqvist et al., 2014).
These findings appear to be best compatible with a scenario in which the artubulins are direct evolutionary ancestors of the eukaryotic tubulins whereas bacterial tubulins originated as a result of horizontal transfer of eukaryotic alpha-beta tubulin genes into at least two bacterial lineages.
Alpha-2,3-sialyltransferases mediate the transfer of sialic acid with an alpha 2,3-linkage to terminal Gal residues.
Alpha-2,8-sialyltransferases mediate the transfer of sialic acid with an alpha 2,8-linkage (ST8 Sia I-IV).
Alpha-2,6-sialyltransferases mediate the transfer of sialic acid with an alpha 2,6-linkage to terminal Gal (ST6Gal I-II) [4], [5]or GalNAc residues (ST6Gal NAc I-VI).
However, it is much less than D(R nα − R mβ )|A αn |2 but important because it provides the propagation and transfer of excitation along the alpha-helix.
Furthermore, a similarity search revealed that a portion of the amino acid sequence of the PnfA protein (residues 176 to 240) has approximately 31% identity to equivalent regions from the UspA domain-containing protein of Mycobacterium sp. JLS and the electron transfer flavoprotein alpha subunit-like protein of Methylobacterium nodulans ORS 2060.
