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Figure 5.
FIGURE 5. Crystal structure of PTP1B/5. The ortho-Cl
substituent of the inhibitor binds in the D site where it
participates in VDW interactions with Tyr^46, Ser^216, Asp^181,
and Phe^182 and it is only 3.1 and 3.5 Å from one of the
sulfone oxygens and the CH of the heterocycle, respectively. The
IZD-phenyl template and aryl sulfonamide bind in previously
observed conformations, and salicylate binds in the B site where
it is in VDW contact with Met^258 and hydrogen bonds to Arg^24
and Arg^254. The linker that spans the A and B sites is well
defined in the electron density even though it does not interact
extensively with nonpolar residues.
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