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Figure 7.
Fig. 7. A watermoleculetrapped in theac-
tive site f the sulfate-bound structure
bridgestheclosedWpD loop andthebound
oxyanion.The ater moleculeiswithin 3.3A
of severalresiduesincludingthe .sulfate.
istances from the waterare: 3.0 A to sul-
ateoxygen 04 thatis nalogous to thescis-
ileesterlinkage of phosphotyrosine,2.7 A
o sylfateoxygen 02,3.2 A Gln 446 OE 1,
.3 A o Gln450 Ne2, and 3.0br. to theam-
de of Gln 357 on pD loop. The car-
oxylsidechain of.Asp 356 A from
he ater and .6 A from 04.
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