A COMPLETE HIV-1 Env CODING SEQUENCES FROM HIV ISOLATED IN CENTRAL JAVA, INDONESIA

Abstract

Background:The HIV envelope glycoprotein (env) plays a central role in viral transmission to target cells.The genetic diversity of env gene contributes a great mechanism on how HIV-1 could survive.Aims:To determine the genotype and genetic relationship of our isolate compared to the other HIV-1 isolates, especially from Indonesia based on the env gene. Also, for further use, the molecular properties of our gene had been analyzed. Methods: A complete coding sequence of HIV-1 env gene was cloned from 09IDSKA-6 (HIV isolated in Central Java, Indonesia), inserted into an Escherichia coli expression plasmid, and sequenced. The sequencing results of the env gene then subjected for virus subtyping and genotyping. The phylogenetic analysis was performed to know the relationship between the isolate with all HIV isolates in Indonesia based on the env gene.The sequencing results were also subjected for bioinformatics analysis.Results: Based on the molecular analysis of HIV-1 env complete coding sequences, the 09IDSKA-6 belong to HIV CRF01_AEwhich is quite common in Southeast Asia. The signal peptide, protein charge, transmembrane helix, antigenicity, hydrophobicity, secondary structure, and proteolytic cleavageof our gene also had been discussed.

Keywords: HIV-1, env gene, Indonesia. 

References
1. Betts, M.J., and R.B. Russel. 2003. Amino acid properties and consequences of substitutions. In: Bioinformatics for Geneticists. John Wiley & Sons Ltd., Chicester.
2. Gaschen, B., J. Taylor, K. Yusim, B. Foley, F. Gao, D. Lang, V. Novitsky, B. Haynes, B.H. Hahn, T. Bhattacharya, and B. Korber. 2002. Diversity considerations in HIV-1 vaccine selection. Science, vol. 296:2354-2360.
3. Gasteiger, E., C. Hoogland, A. Gattiker, S. Duvaud, M.R. Wilkins, R.D. Appel, and A. Bairoch. 2005. Protein identificationand analysis tools on the ExPASy server. In: The Proteomics Protocols Handbook. Humana Press., New York.
4. Jones, D.T. 1999. Protein secondary structure prediction based on position-specific scoring matrices. J Mol Biol, vol.292:195-202.
5. Kalia, V., S. Sarkar, P. Gupta, and R.C. Montelaro. 2005. Antibody neutralization escape mediated by point mutations in the intracytoplasmic tail of human immunodeficiency virus type 1 gp41. J Virol, vol.79:2097-2107.
6. Kemal, K.S., M. Reinis, B. Weiser, and H. Burger. 2009.Methods for viral RNA isolation and PCR amplificationfor sequencing of near full-length HIV-1 genomes. In: HIV Protocols. Humana Press., New York.
7. Kolaskar, A.S., and P.C. Tongaonkar. 1990. A semi-empirical method for prediction of antigenic determinants on protein antigens. FEBS Lett, vol.276:172-174.
8. Kwong, P.D., R. Wyatt, J. Robinson, R.W. Sweet, J. Sodroski, and W.A. Hendrickson. 1998. Structure of an HIV gp120 envelope glycoprotein in complex with the CD4 receptor and a neutralizing human antibody. Nature, vol. 393:648-659.
9. Pantophlet, R., and D.R. Burton. 2006. GP120: target for neutralizing HIV-1 antibodies. Annu RevImmunol, vol.24:739-769.
10. Petersen, T.N., S. Brunak, G. Von Heijne, and H. Nielsen. 2011. SignalP 4.0: discriminating signal peptides from transmembrane regions. Nat Methods, vol. 8:785-786.
11. Richardson, J.S. 1981. The anatomy and taxonomy of protein structure. Adv Protein Chem, vol. 34:339.
12. Rodriguez, D., J.R. Rodriguez, and M. Esteban. 1995. Enhanced proteolytic processing of the human immunodeficiency virus type 1 envelope protein in murine Ltk(-) cells. AIDS Res Hum Retroviruses, vol. 11:81-85.
13. Song, J., H. Tan, A.J. Perry, T. Akutsu, G.I. Webb, J.C. Whisstock, and R.N. Pike. 2012. PROSPER: an integrated feature-based tool for predicting protease substrate cleavage sites. PLoS One, vol. 7:e50300.
14. Tamura K, Peterson D, Peterson N, Stecher G, Nei M, Kumar S. 2011. MEGA5: Molecular Evolutionary Genetics Analysis using Maximum Likelihood, Evolutionary Distance, and Maximum Parsimony Methods. Mol BiolEvol, vol. 28:2731-2739.

15. Van Regenmortel MH. 2001. Antigenicity and immunogenicity of synthetic peptides.Biologicals, vol. 29: 209-213.
16. Yokoyama M, Naganawa S, Yoshimura K, Matsushita S, Sato H. 2012. Structural dynamic ofHIV-1 envelope gp120 outer domain with V3 loop. PLoS One, vol. 7:e37530.
17. Zhu P, Winkler H, Chertova E, Taylor KA, Roux KH. 2008. Cryoelectron tomography of HIV-1 envelope spikes: further evidence for tripod-like legs. PLoSPathog, vol.11:e1000203.