Example sentences for: maguk

How can you use “maguk” in a sentence? Here are some example sentences to help you improve your vocabulary:

  • The MAGUK family of proteins [ 2 10 ] have characteristic domains which are present in DLG5: PDZ1 at bp 3763-4074, PDZ 2 domain 4186-4518 bp, SH3 domain bp 4570-4782 and the GUK domain at bp 4915-5539 (Figure 2).

  • The DLG5 gene encodes for a protein that is a member of the MAGUK (Membrane Associated Guan late Kinase homologs) family of proteins located in the plasma membrane [ 2 ] . MAGUK is a new family of proteins that act as a molecular scaffold for intracellular signaling pathways [ 11 ] . The MAGUK family of proteins is characterized by domains that interact with other proteins to create an assembly of large multi-protein complexes [ 10 ] . The PDZ (PSD-95, DLG and ZO-1) domains are the best characterized for their binding to the C-terminal region of channels and transmembrane proteins [ 11 ] . Usually each protein has 1-3 copies of such domains [ 8 12 13 ] . The SH3 domain (Src homology 3) are present in proteins that couple transmembrane receptors to signaling molecules [ 14 ] . The presence of this domain in MAGUKs increases their possibilities of interacting with signaling pathways.

  • It is notable that the PDZ domains predicted for the DLG5 protein do not have the GLGF motif [ 2 ] , present in most members of the MAGUK family.

  • This motif helps in the binding of the MAGUK with the C-terminus of proteins that have the consensus E (S/T) × (V/l) motif [ 19 ] . However the studies on the Drosophila protein InaD, which also has a PDZ domain, show that are other targets for the PDZ domain that do not have the consensus C-terminus binding motif [ 20 ] . Thus in DLG5 the PDZ domain may be binding to other targets that do not require the classic GLGF motif for interaction.

  • Previously reported MAGUKs have been studied for these interactions, and elegant work has shown one of its members, p55, to form a ternary complex that links the cytoskeleton and the plasma membrane to maintain proper cell shape [ 3 ] . Also there is significant evidence that MAGUKs are active in protein clustering especially of ion channels and membrane bound receptors [ 6 ] . This interaction has been proven by experiments in which DLG5 mutants show loss of clustering of the Shaker channels at neuromuscular junction [ 6 ] . Mammalian PSD-95 is a MAGUK which binds Kir4.


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