By A. F. Rowley, Hartmut Kühn, T. Schewe
Eicosanoids are a various workforce of biologically lively molecules derived from polyunsaturated fatty acid precursors. This quantity attracts jointly for the 1st time a chain of overviews at the biosynthesis and sensible importance of those and comparable compounds in quite a lot of animals, crops, and micro-organisms. All chapters are written via well-known specialists of their fields, and lots of utilize a great deal of unpublished fabrics. This quantity is geared toward complicated undergraduates and at researchers attracted to lipid biochemistry and normal plant and animal biology.
Originally released in 1999.
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1992) E nzym e N om enclature. R ecom m endations of the N om enclature C o m m ittee of the Intern atio n al U n io n of B iochem istry and M olecular Biology on the N om enclature and Classification of Enzymes, Academic Press, San Diego 9. , Schewe, T. M. (1986) Adv. Enzym ol. 58,273-311 10. Yamamoto, S. (1992) Biochim. Biophys. Acta 1128,117-131 11. H . (1992) FASEB J. 6,713-736 12. Euler, H . (1936) J. Physiol. 88,213-216 13. J. M. (1992) N ature (London) 367,243-249 14. , Ekabo, O . M. (1996) Biochemistry 35, 7330-7340 15.
T h e reaction involves an abstraction of the p ro -5 hydrogen fro m the p ro ch iral centre C 8 and (8A )-oxygen in sertion . T he (8A )-dioxygenase reaction (Scheme 11) differs from the L O X reaction in several m echanistic aspects: (i) the linoleate (8R )dioxygenase reaction involves a hydrogen abstraction from an allylic m ethylene (bond dissociation energy of 88 kcal-mol-1) whereas L O X s remove hydrogen from bisallylic m ethylenes (bond dissociation energy of 75 kcal-m ol-1). (ii) D u rin g linoleate (8R)-oxygenation, oxygen is introduced at the same allylic methylene that hydrogen is removed from .
Y384 on COX-I andY371 on COX-Z are the active sites for the formation of tyrosine radical in the cyclooxygenase reaction. H387 on COX-I and H3 74 on COX-Z are the proximal haem ligands for the enzymes. S529 on COX-I and 5516 on COX-Z are the aspirin-acetylated serine residues. Capital letters indicate amino acid residues, and the attached integers indicate residue numbers in the enzymes. Tanabe 28 recently determ ined by X -ray crystallography (Fig. 2) , giving fu rth er insight on the function of the enzyme.
Eicosanoids and related compounds in plants and animals by A. F. Rowley, Hartmut Kühn, T. Schewe
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