hEGF, or human growth factor-like EGF, domains have six conserved residues disulfide-bonded into the characteristic 'ababcc' pattern. They are involved in growth and proliferation of cells, in proteins of the Notch/Delta pathway, neurogulin and selec ...
hEGF, or human growth factor-like EGF, domains have six conserved residues disulfide-bonded into the characteristic 'ababcc' pattern. They are involved in growth and proliferation of cells, in proteins of the Notch/Delta pathway, neurogulin and selectins. hEGFs are also found in mosaic proteins with four-disulfide laminin EGFs such as aggrecan and perlecan. The core fold of the EGF domain consists of two small beta-hairpins packed against each other. Two major structural variants have been identified based on the structural context of the C-terminal Cys residue of disulfide 'c' in the C-terminal hairpin: hEGFs and cEGFs. In hEGFs the C-terminal thiol resides in the beta-turn, resulting in shorter loop-lengths between the Cys residues of disulfide 'c', typically C[8-9]XC. These shorter loop-lengths are also typical of the four-disulfide EGF domains, laminin ad integrin. Tandem hEGF domains have six linking residues between terminal cysteines of adjacent domains. hEGF domains may or may not bind calcium in the linker region. hEGF domains with the consensus motif CXD4X[F,Y]XCXC are hydroxylated exclusively in the Asp residue.
TgMIC1 is released as part of a complex by Toxoplasma gondii prior to invasion. The complex which consists of TgMIC4-MIC1-MIC6 participates in host cell attachment and penetration and is critical in invasion. This is the C terminal domain of TgMIC1 w ...
TgMIC1 is released as part of a complex by Toxoplasma gondii prior to invasion. The complex which consists of TgMIC4-MIC1-MIC6 participates in host cell attachment and penetration and is critical in invasion. This is the C terminal domain of TgMIC1 which has a Galectin-like fold which interacts with and stabilises TgMIC6 providing a mechanism for an exit from the early secretory compartments and trafficking of the complex to micronemes [1].
