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Publication Abstract from PubMed
Here we report the first structure of a mammalian 15-lipoxygenase. The protein is composed of two domains; a catalytic domain and a previously unrecognized beta-barrel domain. The N-terminal beta-barrel domain has topological and sequence identify to a domain in the mammalian lipases, suggesting that these domains may have similar functions in vivo. Within the C-terminal domain, the lipoxygenase substrate binding site is a hydrophobic pocket defined by a bound inhibitor. Arachidonic acid can be docked into this deep hydrophobic pocket with the methyl end extending down into the bottom of the pocket and the acid end tethered by a conserved basic residue on the surface of the enzyme. This structure provides a unifying hypothesis for the positional specificity of mammalian lipoxygenases.
The structure of mammalian 15-lipoxygenase reveals similarity to the lipases and the determinants of substrate specificity.,Gillmor SA, Villasenor A, Fletterick R, Sigal E, Browner MF Nat Struct Biol. 1997 Dec;4(12):1003-9. PMID:9406550[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
↑ Gillmor SA, Villasenor A, Fletterick R, Sigal E, Browner MF. The structure of mammalian 15-lipoxygenase reveals similarity to the lipases and the determinants of substrate specificity. Nat Struct Biol. 1997 Dec;4(12):1003-9. PMID:9406550
