10.12.2012 Views

netLibrary - eBook Summary Structure-based Drug Design by ...

netLibrary - eBook Summary Structure-based Drug Design by ...

netLibrary - eBook Summary Structure-based Drug Design by ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Document<br />

A. Receptor Targets<br />

Figure 20<br />

Iterative cycle(s) for structure-<strong>based</strong> drug design<br />

Page 592<br />

Amongst the known superfamilies of cell membrane anchored receptors, significant research has been<br />

focused on GPCR targets (Table 1). The GPCR superfamily of receptors consist of seven<br />

transmembrane-spanning (TM) helices. Sequence homology among them varies from 25–70% (for<br />

reviews see References 33, 122–132). The initial development of 3D structural models of GPCR targets<br />

has been developed from homology-building methodologies <strong>based</strong> on a low-resolution structure of<br />

bacteriorhodopsin [133]. Representative examples of recent studies that provide insight to<br />

pharmacophore modeling and structure-<strong>based</strong> drug design of peptide, peptidomimetic, and nonpeptide<br />

ligands are discussed below.<br />

3 G-Protein-Coupled Receptors<br />

Recent studies have explored several GPCR targets with respect to ligand-receptor binding interactions<br />

using site-directed mutagenesis to explore agonist<br />

http://legacy.netlibrary.com/nlreader/nlReader.dll?bookid=12640&filename=Page_592.html (1 of 2) [4/9/2004 1:18:59 AM]

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!