Abstract
Lipoxygenases (LOXs) are a group of enzymes involved in the oxygenation of polyunsaturated fatty acids. Among these 5-lipoxygenase (5-LOX) is the key enzyme leading to the formation of pharmacologically important leukotrienes and lipoxins, the mediators of inflammatory and allergic disorders. In view of close functional similarity to mammalian lipoxygenase, potato 5-LOX is used extensively. In this study, the homology modeling technique has been used to construct the structure of potato 5-LOX. The amino acid sequence identity between the target protein and sequence of template protein 1NO3 (soybean LOX-3) searched from NCBI protein BLAST was 63%. Based on the template structure, the protein model was constructed by using the Homology program in InsightII. The protein model was briefly refined by energy minimization steps and validated using Profile-3D, ERRAT and PROCHECK. The results showed that 99.3% of the amino acids were in allowed regions of Ramachandran plot, suggesting that the model is accurate and its stereochemical quality good. Like all LOXs, 5-LOX also has a two-domain structure, the small N-terminal β-barrel domain and a larger catalytic domain containing a single atom of non-heme iron coordinating with His525, His530, His716 and Ile864. Asn720 is present in the fifth coordination position of iron. The sixth coordination position faces the open cavity occupied here by the ligands which are docked. Our model of the enzyme is further validated by examining the interactions of earlier reported inhibitors and by energy minimization studies which were carried out using molecular mechanics calculations. Four ligands, nordihydroguaiaretic acid (NDGA) having IC50 of 1.5 μM and analogs of benzyl propargyl ethers having IC50 values of 760 μM, 45 μM, and no inhibition respectively were selected for our docking and energy minimization studies. Our results correlated well with the experimental data reported earlier, which proved the quality of the model. This model generated can be further used for the design and development of more potent 5-LOX inhibitors.





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References
Gerwick WH (1994) Biochim Biophys Acta 1211:243
De Petrocellis L, Di Marzo V (1994) Prostaglandins Leukot Essent Fatty Acids 51:215
Funk CD (1996) Biochim Biophys Acta 1304:65
Yamamoto S, Suzuki H, Ueda N (1997) Prog Lipid Res 36:23
Zimmerman DC, Vick BA (1973) Lipids 8:264
Krieg P, Kinzig A, Heidt M, Marks F, Fürstenberger G (1998) Biochim Biophys Acta 1391:7
Boeglin WE, Kim RB, Brash AR (1998) Proc Natl Acad Sci USA 95:6744
Sun D, Elsea SH, Patel PI, Funk CD (1998) Cytogenet Cell Genet 81:79
Reddanna P, Whelan J, Maddipati KR, Reddy CC (1990) Methods Enzymol 187:268
Chen X, Reddanna P, Reddy GR, Kidd R, Hildebrandt G, Reddy CC (1998) Biochem Biophys Res Commun 243:438
Whelan J, Reddanna P, Nikolaev V, Hildebrandt G, Reddy CC (1988) In: Reddy CC, Hamilton GA, Madyastha KM (eds) Biological oxidation systems, vol 2. Academic Press, San Diego, CA, p 765
Nikolaev V, Reddanna P, Whelan J, Hildebrandt G, Reddy CC (1990) Biochem Biophys Res Commun 170:491
Rapoport SM, Schewe T, Wiesner R, Halangk W, Ludwig P, Janicke-Höhne M, Tannert C, Hiebsch C, Klatt D (1979) Eur J Biochem 96:545
Brash AR (1999) J Biol Chem 274:23679
Shibata D, Axelrod B (1995) J Lipid Mediat Cell Signal 12:213
Minor W, Steczko J, Stec B, Otwinowski Z, Bolin JT, Walter R, Axelrod B (1996) Biochemistry 35:10687
Prigge ST, Boyington JC, Faig M, Doctor KS, Gaffney BJ, Amzel LM (1997) Biochimie 79:629
Sunitha M, Matthias W, Igor I, Sven H, Gerhard F, Peter K, Reddanna P, Hartmut K (2005) J Biol Chem 280:36633
Bigby TD, Levy BD, Serhan CN (1998) In: Drazen JM, Dahlén S-E, Lee TH (eds) Five-lipoxygenase products in asthma. Marcel Dekker, New York, p 125
Funk CD (2001) Science 294:1871
Dixon RA, Diehl RE, Opas E, Rands E, Vickers PJ, Evans JF, Gillard JW, Miller DK (1990) Nature 343:282
Chang M, Rao MK, Reddanna P, Li CH, Tu CP, Corey EJ, Reddy CC (1987) Arch Biochem Biophys 259:536
Reddanna P, Sandeep Prabhu K, Whelan J, Reddy CC (2003) Arch Biochem Biophys 413:158
Fitzaimmons BJ, Rokach J (1989) In: Rokach J (ed) Leukotrienes and lipoxygenases. Elsevier, New York, NY, p 427
Reddanna P, Rao MK, Reddy CC (1985) FEBS Lett 193:39
Barhate NB, Reddy CM, Reddy PS, Wakharkar RD, Reddanna P (2002) Indian J Biochem Biophys 39:264
Du L, Zhang Z, Luo X, Chen K, Shen X, Jiang H (2006) J Biol Chem 139:715
Hammarberg T, Provost P, Persson B, Rådmark O (2000) J Biol Chem 295:38787
Hemak J, Gale D, Brock TG (2002) J Mol Model 8:102
Bindu PH, Sastry GM, Sastry GN (2004) Biochem Biophys Res Commun 320:461
Werz O, Tretiakova I, Michel A, Ulke-Lemee A, Hörnig M, Franke L, Schneider G, Samuelsson B, Rådmark O, Steinhilber D (2005) Proc Natl Acad Sci USA 102:13164
Skrzypczak-Jankun E, Borbulevych OY, Jankun J (2004 Acta Crystallogr D Biol Crystallogr 60:613
INSIGHT II. (2000) Molecular Modeling Software. Accelrys, Inc., San Diego, USA
Berman HM, Westbrook J, Feng Z, Gilliland G, Bhat TN, Weissig H, Shindyalov IN, Bourne PE (2000) Nucleic Acids Res 28:235
Homology user guide, Accelrys, Inc., San Diego, USA (1999)
CHARMM user guide, Accelrys, Inc., San Diego, USA (1999)
Profile-3D user guide, Accelrys, Inc., San Diego, USA (1999)
Laskowski RA, Moss DS, Thornton JM (1993) J Mol Biol 231:1049
Colovos C, Yeates TO (1993) Protein Sci 2:1511
Jones G, Willett P, Glen RC, Leach AR, Taylor R (1997) J Mol Biol 267:727
Sansom CE, Wu J, Weber IT (1992) Protein Eng 5:659
Montgomery JA, Niwas S, Rose JD, Secrist JA 3rd, Babu YS, Bugg CE, Erion MD, Guida WC, Ealick SE (1993) J Med Chem 36:55
Erion MD, Stoeckler JD, Guida WC, Walter RL, Ealick SE (1997) Biochemistry 36:11735
Reddy MR, Viswanadhan VN, Erion MD (1998) In: Kubinyi H, Folkers G, Martin YC (eds) 3D QSAR in drug design, vol 2. Kluwer Academic Publishers, New York, NY, p 85
Reddy RN, Mutyala R, Aparoy P, Reddanna P, Reddy MR (2007) Curr Pharm Des 13:3505
Reddy MR, Erion MD (2005) Curr Pharm Des 11:283
Reddy MR, Erion MD (2001) J Am Chem Soc 123:6246
Singh UC, Weiner PK, Caldwell JK, Kollman PA (1986) AMBER version 3.0. University of California, San Francisco, CA
Needleman SB, Wunch CD (1970) J Mol Biol 48:443
Prigge ST, Boyington JC, Faig M, Doctor KS, Gaffney BJ (1997) Biochimie 79:629
Zhang YY, Lind B, Radmark O, Samuelsson B (1993) J Biol Chem 268:2535
Hammerberg T, Zhang YY, Lind B, Radmark O, Samuelsson B (1995) Eur J Biochem 230:401
QUANTA, Accelrys Inc., San Diego, CA, USA (2000)
Brash AR (1999) J Biol Chem 274:23679
Acknowledgements
This work was supported by research grants from Department of Biotechnology (DBT), Govt. of India (Grant # 37(1221)/05/EMR-II). We thank Centre for Modelling, Simulation and Design (CMSD), University of Hyderabad for permitting us to use the SGI workstation and InsightII facilities. We duly acknowledge Council of Scientific and Industrial Research (CSIR), Govt. of India for providing junior research fellowship to P. Aparoy.
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Aparoy, P., Reddy, R.N., Guruprasad, L. et al. Homology modeling of 5-lipoxygenase and hints for better inhibitor design. J Comput Aided Mol Des 22, 611–619 (2008). https://doi.org/10.1007/s10822-008-9180-0
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DOI: https://doi.org/10.1007/s10822-008-9180-0