688329-97-7Relevant academic research and scientific papers
Conformationally constrained diacylglycerol (DAG) analogs: 4-C-hydroxyethyl-5-O-acyl-2,3-dideoxy-D-glyceropentono-1,4-lactone analogs as protein kinase C (PKC) ligands
Lee, Jeewoo,Kim, Su Yeon,Kang, Ji-Hye,Acs, Geza,Acs, Peter,Blumberg, Peter M.,Marquez, Victor E.
, p. 69 - 77 (2007/10/03)
The (R)-DAG-lactones (5 and 7E/Z) are conformationally constrained diacylglycerol (DAG) analogs with high potency as protein kinase C (PKC) ligands. Here, we have prepared and characterized their one-carbon lengthened analogs (6 and 8E/Z). The target compounds were synthesized from 1,2-O-isopropylidene D-xylose through a key intermediate, 4-C-hydroxyethyl-2,3- dideoxy-D-glyceropentono-1,4-lactone (13); they were evaluated as competitive ligands to displace bound [3H]phorbol 12,13-dibutyrate (PDBU) from a recombinant single isozyme (PKC-α). The binding affinities of the synthesized compounds were Ki = 2.623 μM for 6, Ki = 1.080 μM for 8Z and Ki = 0.92 μM for 8E, which were ca. 27, 90, and 70 times less potent than the corresponding parent compounds (5, 7Z and 7E). Molecular modeling indicated that the reduced binding affinity of the representative 3-alkylidene lactone 8Z, as compared to 7Z, may be explained by its poor fit in the sn-1 binding mode as well as by its entropic loss due to the relatively flexible hydroxyethyl group.
