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PIG PURPLE ACID PHOSPHATASE COMPLEXED WITH PHOSPHATEPIG PURPLE ACID PHOSPHATASE COMPLEXED WITH PHOSPHATE
Structural highlights
FunctionPPA5_PIG Uteroferrin is a phosphoprotein phosphatase, synthesized in response to progesterone. It appears to function in transplacental transport of iron in pig. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBACKGROUND: Mammalian purple acid phosphatases are highly conserved binuclear metal-containing enzymes produced by osteoclasts, the cells that resorb bone. The enzyme is a target for drug design because there is strong evidence that it is involved in bone resorption. RESULTS: The 1.55 A resolution structure of pig purple acid phosphatase has been solved by multiple isomorphous replacement. The enzyme comprises two sandwiched beta sheets flanked by alpha-helical segments. The molecule shows internal symmetry, with the metal ions bound at the interface between the two halves. CONCLUSIONS: Despite less than 15% sequence identity, the protein fold resembles that of the catalytic domain of plant purple acid phosphatase and some serine/threonine protein phosphatases. The active-site regions of the mammalian and plant purple acid phosphatases differ significantly, however. The internal symmetry suggests that the binuclear centre evolved as a result of the combination of mononuclear ancestors. The structure of the mammalian enzyme provides a basis for antiosteoporotic drug design. Crystal structure of mammalian purple acid phosphatase.,Guddat LW, McAlpine AS, Hume D, Hamilton S, de Jersey J, Martin JL Structure. 1999 Jul 15;7(7):757-67. PMID:10425678[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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