Words similar to gdp-bound
Example sentences for: gdp-bound
How can you use “gdp-bound” in a sentence? Here are some example sentences to help you improve your vocabulary:
Several laboratories have shown that in addition to mutations in the N(T)KxD motif, which reduce overall nucleotide binding, dominant-negative Rab constructs can be generated by introducing amino acid substitutions ( e.g. , asparagine) at the position cognate to Ras S17 ( i.e. , S22 in Rab24) [ 31 40 41 42 ] . Such proteins are thought to be locked in an inactive GDP-bound state because the mutation markedly reduces their affinity for GTP, compared to GDP [ 42 ] . As shown in Fig.
Since neither Rab24(S22N) nor Rab24(S67Q) showed evidence of being locked in a GDP-bound state, it is unlikely that either would function as a dominant-negative.
Rab proteins comprise a large family of Ras-related GTPases that function in the anterograde and retrograde trafficking of proteins in mammalian cells [ 1 2 3 ] . Different Rab proteins reside in specific subcellular membranes or organelles, where they mediate vesicular transport between discrete donor and acceptor compartments in the endocytic or exocytic pathways [ 4 5 ] . Detailed studies of a few Rab proteins ( e.g .; Rab1, Rab5 and Rab9) have led to a general model wherein Rab proteins are presumed to cycle on and off donor and acceptor membranes in connection with changes in their guanine nucleotide state [ 6 7 8 ] . In the active GTP-bound state, Rab proteins associate with budding transport vesicles [ 9 10 11 ] and appear to participate in the assembly of membrane docking complexes [ 12 13 14 ] . Following vesicle fusion with the acceptor compartment and GTP hydrolysis, the inactive GDP-bound Rab is extracted from the membrane by a carrier protein termed guanine nucleotide dissociation inhibitor (GDI) [ 15 16 17 ] . The GTPase can then re-enter the transport cycle through nucleotide exchange promoted by a specific exchange factor at the donor vesicle membrane [ 18 19 20 ] . In addition to changes in guanine nucleotide state, the posttranslational prenylation of Rab proteins plays an important role in the cycling mechanism.
Loading...