5‐lipoxygenase‐activating protein is an arachidonate binding protein

FEBS Letters

Perrier, Hélène³  Mancini, Joseph A.¹  Charleson, Stella¹  Vickers, Philip J.¹  Wong, Elizabeth¹  Prasit, Peptiboon³  Abramovitz, Mark²  Cox, Martha E.²  Wang, Zhaoyin³ 

[1] Department of Pharmacology, Merck Frosst Centre for Therapeutic Research, Quebec H9R 4P8, Canada;Department of Molecular Biology, Merck Frosst Centre for Therapeutic Research, Quebec H9R 4P8, Canada;Department of Medicinal Chemistry, Merck Frosst Centre for Therapeutic Research, Quebec H9R 4P8, Canada

关键词: 5-Lipoxygenase-activating protein;    5-Lipoxygenase;    Arachidonic acid;    Photoaffinity labeling;    Baculovirus;    5-HPETE;    (5S)-hydroperoxy-6;    8;    11;    14-eicosatetraenoic acid;    LTA4;    5;    6-oxido-7;    9;    11;    14-eicosatetraenoic acid;    LTB4;    (5S;    12R)-dihydroxy-6;    8;    10;    14-eicosatetraenoic acid;    LTC4;    (5S)-hydroxy-(6R)-S-glutathionyl-7;    9;    -(trans)-11;    14-(cis)-eicosatetraenoic acid;    LTD4;    (5S)-hydroxy-(6R)-S-cysteinylglycyl-7;    9-(trans)-11;    14-(cis)-eicosatetraenoic acid;    LTE4;    (5S)-hydroxy-(6R)-S-cysteinyl-7;    9-(trans)-11;    14-(cis)-eicosatetraenoic acid;    5-LO;    5-lipoxygenase;    FLAP;    5-lipoxygenase-activating protein;    MK.-886;    3-[1-(p-chlorophenyl)-5-isopropyl-3-tert-butylthio-1H-indol-2-yl]-2;    2-dimethylpropanoic acid (formerly designated L-663;    536);    L-691;    831;    ((1-(4-iodobenzyl)-3-(3;    3-dimethyl-1-oxo-1-butyl)-5-quinol-2-ylmethoxy)-indol-2-yl)-2;    2-dimethyl propionic acid;    L-691;    678;    1H-indole-2-propanoic acid;    3-[(4-azidophenyl)sulfonyl]-2-[(4-iodophenyl)methyl]-α;    α-dimethyl-5-(2-quinolinylmethoxy)-;    DMSO;    dimethyl sulphoxide;    SDS-PAGE;    sodium dodecyl sulphate polyacrylamide gel electrophoresis;    EDTA;    ethylenediamine tetraacetic acid;    IC50;    concentration required for 50% inhibition;   

DOI  :  10.1016/0014-5793(93)80528-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

5-Lipoxygenase-activating protein (FLAP) is an 18-kDa integral membrane protein which is essential for cellular leukotriene (LT) synthesis, and is the target of LT biosynthesis inhibitors. However, the mechanism by which FLAP activates 5-LO has not been determined. We have expressed high levels of human FLAP in Spodoptera frugiperda (Sf9) insect cells infected with recombinant baculovirus, and used this system to demonstrate that FLAP specifically binds [¹²⁵I]L-739,059, a novel photoaffinity analog of arachidonic acid. This binding is inhibited by both arachidonic acid and MK-886, an LT biosynthesis inhibitor which specifically interacts with FLAP. These studies suggest that FLAP may activate 5-LO by specifically binding arachidonic acid and transferring this substrate to the enzyme.

【 授权许可】

Unknown