LIS - Legume Information System
Information about legume traits for crop improvement
CicerMine
v5.1.0.3
Cicer data from the Legume Information System
v5.1.0.3
Cicer data from the Legume Information System
| Type | Domain |
| Description | This entry represents the C-terminal domain of heterotetrameric clathrin-associated adaptor protein complex 2 (AP-2) medium mu2 subunit. Mu2 is ubiquitously expressed in mammals. In higher eukaryotes, AP-2 plays a critical role in clathrin-mediated endocytosis from the plasma membrane in different cells. The membrane-anchored cargo molecules can be linked to the outer lattice of CCVs by AP-2. Those cargo molecules interact with adaptors through short sorting signals in their cytosolic segments. Tyrosine-based endocytotic signals are one of the most important sorting signals. They are of the form Y-X-X-Phi, where Y is tyrosine, X is any amino acid and Phi is a bulky hydrophobic residue that can be Leu, Ile, Met, Phe, or Val. These kinds of sorting signals can be recognized by the C-terminal domain of AP-2 mu2 subunit, also known as Y-X-X-Phi signal-binding domain that contains two hydrophobic pockets, one for the tyrosine-binding and one for the bulky hydrophobic residue-binding. Since the Y-X-X-Phi binding site is buried in the core structure of AP-2, a phosphorylation induced conformational change is required when the cargo molecules binds to AP-2 [ , ]. In addition, the C-terminal domain of mu2 subunit has been shown to bind other molecules. For instance, it can bind phosphoinositides, in particular PtdIns4,5P2, which might be involved in the recognition process of the tyrosine-based signals [ , ]. It can also interact with synaptotagmins, a family of important modulators of calcium-dependent neurosecretion within the synaptic vesicle (SV) membrane []. |
| Short Name | Mu2_C |
