• No results found

GStreamer kommando for å motta video

In document Fjernstyring av kjøretøy over 5G/4G (sider 88-100)

D.1 Kode på mikrokontroller

3.58 GStreamer kommando for å motta video

O uso da estrutura cristalográfica da TbFeSODB2 na otimização do desenho de inibidores específicos, através de experimentos de co-cristalização com compostos já conhecidos, cujos mecanismos ainda não são perfeitamente esclarecidos, ou com bibliotecas de fragmentos.

A atual base de dados disponibilizou um número satisfatório de seqüências para a análise do acoplamento estatístico, onde dois importantes centros reguladores da atividade e especificidade pelo metal foram identificados. No entanto, os resultados devem ser considerados parciais, uma vez que não existem seqüências depositadas na base de dados suficientes para representar tetrâmeros de ferro nem dímeros de manganês, o que sugere que no futuro, com a ampliação dos projetos de genoma, a mesma análise poderá fornecer significativas informações adicionais.

No futuro pretende-se usar mutagenese sítio dirigida dos resíduos identificados nos clusters específicos de cada metal e estado oligomérico, para avaliar o impacto na:

- Atividade catalítica - Especificidade pelo metal

- Estrutura local e eletrônica do sítio usando EPR - Potencial redox

O uso de mutações simples e em conjunto, envolvendo a troca de resíduos associados à especificiade de um dado metal por outro, serão usados para entender como a estrutura da cadeia polipeptídica influencia as propriedades catalíticas do sitio ativo.

REFERÊNCIAS

1. MORAN. M. et. al. The new landscape of neglected disease drug development. London. The

Wellcome Trust, 2005.

2. MORAN M. A breakthrough in R&D for neglected diseases: new ways to get the drugs we need. PloS Medicine, v. 2, n. 9, p. 828-832, 2005.

3. OLIVEIRA E. A.; LABRA M. E.; BERMUDEZ J. Public production of medicines in Brazil: an overview. Cadernos de Saúde Pública, v. 22, n. 11, p. 2379-2389, 2006.

4. PÉCOUL B. et al. Access to essential drugs in poor countries:a lost battle? Journal of

American Medical Associantion, v. 281, n. 4, p 361-367, 1999.

5. THE INSTITUTE OF TROPICAL MEDICINE IN ANTWERP, trypanaosoma brucei

history. Disponível em:

<http://www.itg.be/itg/DistanceLearning/LectureNotesVandenEndenE/03_African_trypanoso miasisp3.htm> Acesso em: 9 de junho de 2008.

6. BEVERLEY, S.M. Protozomics: Trypanosomatid Parasite Genetics Comes Of Age. Nature

Reviews Genetics, v.4, n. 1, p. 11-12, 2003.

7. FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS.

Programme Against African Trypanosomiasis. Diponível em:

<http://www.fao.org/ag/againfo/programmes/en/paat/disease.html> Acesso em: 9 de junho de 2008.

8. REY L. Parasitologia. 2ed. Rio de Janeiro: Guanabara Koogan, 1991.

9. MATTHEWS K.R.; GULL K. Cycles within cycles: the interplay between differentiation and cell division in Trypanosoma brucei. Parasitology Today, v. 10, p. 473–476, 1994.

10. WANG C. C. Molecular mechanisms and therapeutic approaches to the treatment of African trypanosomiasis. Annual Review of Pharmacology and Toxicology, v. 35, p. 93–127, 1995. 11. OPPERDOES, F.R.; BORST, P. Localization of nine glycolytic Enzymes in a Microbody-

like Organele in Trypanosoma brucei: the glycossome. FEBS Letter., v. 80, n. 2, p. 360-364. 1977.

12. BERRIMAN, M. et al. The genome of the African trypanosome Trypanosoma brucei.

Science, v. 30, n. 5733, p.416–422, 2005.

13. LEGROS, D. et al. Risk factors for treatment failure after melarsoprol for Trypanosoma brucei gambiense trypanosomiasis in Uganda. Transactions of the Royal Society of Tropical

14. VAN W.C.V. Therapy and prophylaxis of systemic protozoan infections. Drugs, v. 40, n. 2, p. 176–202, 1990.

15. BORST, P.; OUELLETTE, M. ANNU. New mechanisms of drug resistance in parasitic protozoa. Annual Review of Microbiology, v. 49, p. 427-460 , 1995.

16. BARRETT, M. P.; FAIRLAMB, A. H. The biochemical basis of arsenical-diamidine crossresistance in African trypanosomes. Parasitol Today, v. 15, n. 4, p. 136-40. 1999.

17. PÉPIN, J. & MILORD, F. The treatment of human African trypanosomiasis. Advances in.

Parasitology, v. 33, p. 1-47, 1994.

18. AWADZI, K. et al. The chemotherapy of onchocerciasis XVIII. Aspects of treatment with suramin. Annals of Tropical Medicine and Parasitology, v. 46, n.1 p. 19–26, 1995.

19. GARDNER, M.J. et al. Genome sequence of the human malaria parasite Plasmodium falciparum. Nature, v. 419 , p.498-511. 2002.

20. FOSTER, J.M.; JOHNSTON D.A. Helminth genomics: from gene discovery to genome.

Sequencing Trends in Parasitology, v. 18, n. 6, p. 241-242, 2002.

21. PLEWES, K. A., BARR, S. D., GEDAMU, L. Iron Superoxide Dismutases Targeted to the Glycosomes of Leishmania chagasi Are Important for Survival. Infection and Immunity, v. 71, n. 10, p. 5910-5920, 2003.

22. OPPERDOES, F. R. Compartmentation of Carbohydrate Metabolism in Trypanosome.

Annual Reviews of Microbiology, v. 41, p. 127-151, 1987.

23. WIERENGA, R.K. et al. 1.83 A structure of trypanosomal triosephosphate isomerase crystallized in the presence of 2.4 M-ammonium sulphate. A comparison with the structure of the trypanosomal triosephosphate isomerase-glycerol-3-phosphate complex. Journal of

Molecular Biology, v. 220, n. 4, p. 995-1015, 1991.

24. VELLIEUX, F.M. et al. Structure of glycosomal glyceraldehyde-3-phosphate dehydrogenase from Trypanosoma brucei determined from Laue data. Proceedings of National Academy of

Science U S A, v. 90, n. 6, p. 2355-2359, 1993.

25. BERNSTEIN, B.E.; MICHELS, P.A.; HOL, W.G. Synergistic effects of substrate-induced conformational changes in phosphoglycerate kinase activation. Nature, v. 385, n. 6613, p. 275-278. 1997.

26. SUBBAYYA I.N. et al. Metabolic enzymes as potential drug targets in Plasmodium falciparum. Indian Journal of Medical Research, v. 106, p. 79-94. 1997.

27. MCKERROW, J. H. et al. The proteases and pathogenicity of parasitic protozoa. Annual.

28. BLACKMAN M.J. Proteases involved in erythrocyte invasion by the malaria parasite: function and potential as chemotherapeutic targets. Current Drug Targets, v. 1, n 1, p. 59-83, 2000.

29. CHANCE, B.; SIES H.; BOVERIS, A. Hydroperoxide metabolism in mammalian organs.

Physiological Reviews, v. 59, n. 3, p. 527–605, 1979.

30. MCCORD J. M.; FRIDOVICH I. Superoxide dismutase. An enzymic function for erythrocuprein (hemocuprein). Journal of Biological Chemistry, v. 244, n. 22, p. 6049–6055. 1969.

31. FRIDOVICH, I. Superoxide radical and superoxide dismutases. Annual Reviews of

Biochemistry, v. 64, p. 97–112, 1995.

32. URSINI, F. et al. SCHOMBURG, D. AND FLOHÉ, L., Diversity of glutathione peroxidases.

Methods in Enzymology, v. 252, p.. 38–53, 1995.

33. MEYER, M. J. et al. Quantitative in vivo measurement of glutathione in Arabidopsis cells.

The Plant Journal, v. 27, n. 1, p. 67–78, 2001.

34. FLOHE, L.; HECHT, H.J.; STEINERT, P. Glutathione and trypanothione in parasitic hydroperoxide metabolism. Free Radical Biology &. Medicine, v. 27, n. 9, p. 966–984, 2003. 35. BOVERIS, A. et al. Deficient metabolic utilization of hydrogen peroxide in Trypanosoma

cruzi. Biochemical Journal, v. 188, n. 3, p. 643–648. 1980.

36. WILKINSON, S.R.; MEYER, D.J.; KELLY, J.M. Biochemical characterization of a trypanosome enzyme with glutathione-dependent peroxidase activity. Biochemical Journal, v. 352, n. 3, p. 755–761, 2000.

37. WILKINSON, S.R. et al. RNA interference identifies two hydroperoxide metabolizing enzymes that are essential to the bloodstream form of the african trypanosome. Journal of

Biological Chemistry, v. 278, n. 34, p. 31640–31646, 2003.

38. KRAUTH-SIEGEL, R.L.; MEIERING, S.K.; SCHMIDT, H. The parasite-specific trypanothione metabolism of trypanosoma and leishmania. Biological Chemistry, v. 384, n. 4, p. 539–549. 2003.

39. STEENKAMP, D.J. Thiol metabolism of the trypanosomatids as potential drug targets.

IUBMB Life, v. 53, n. 4. p. 243–248, 2003.

40. HALLIWELL, B.; CLEMENT, M. V.; LONG, L. H. Hydrogen peroxide in the human body.

FEBS Letters., v. 10, n. 1, p 486. 2000.

41. BABIOR, B. M. Superoxide: a two-edged sword. Brazilian Journal of Medical Biological

42. SOULÈRE, L. et al. Selective inhibition of Fe- versus Cu/Zn-superoxide dismutases by 2,3- dihydroxybenzoic acid derivatives. Chemical Pharmceutical Bulletin, v. 50, n. 5, p. 578-582, 2002.

43. GHOSH, S.; GOSWAMI, S.; ADHYA, S. Role of superoxide dismutase in survival of Leishmania within the macrophage. Biochemical Journal, v. 369, n. 3, p. 447-452, 2003. 44. FRIDOVICH, I. Biological effects of the superoxide radical. Archives of Biochemistry and

Biophysics, v. 247, n. 1, p. 1-11, 1986.

45. LUDWIG M.L. et al. Manganese superoxide dismutase from Thermus thermophilus. A structural model refined at 1.8 A resolution. Journal of Molecular Biology, v. 219, n. 2, p. 335-358, 1991.

46. KIM E.J. et al. Transcriptional and post-transcriptional regulation by nickel of sodN gene encoding nickel-containing superoxide dismutase from Streptomyces coelicolor Müller.

Molecular Microbiology, v. 27, p. 187-195, 1998.

47. WUERGES, J. et al. Crystal structure of nickel-containing superoxide dismutase reveals another type of active site. Proccedings of National Academy of Sciences U S A, v. 101, n. 23, p. 8569-8574, 2004.

48. CARDOSO, R.M. et al. Structure of the cytosolic Cu,Zn superoxide dismutase from Schistosoma mansoni. Acta Crystallographica Section D, v. 60, n. 9, p. 1569-1578, 2004. 49. MUNOZ I.G. The crystal structure of an eukaryotic iron superoxide dismutase suggests

intersubunit cooperation during catalysis. Protein Science, v. 14, n. 2, p. 387–394, 2005. 50. BARRETTE, W.C. Potentiometric titrations and oxidation--reduction potentials of several

iron superoxide dismutases. Biochemistry. v. 22, n. 3, p. 624-627. 1983.

51. YAMAKURA F. pH-dependent activity change of superoxide dismutase from Mycobacterium smegmatis. Biochemistry & Molecular Biology Internacional, v. 36, n. 2, p. 233-240. 1995.

52. YAMAKURA F. et al. The pH-dependent changes of the enzymic activity and spectroscopic properties of iron-substituted manganese superoxide dismutase. A study on the metal-specific activity of Mn-containing superoxide dismutase. European Journal of Biochemistry., v. 227,n. 3, p. 700-706. 1995.

53. LAH M.S. Structure-function in Escherichia coli iron superoxide dismutase: comparisons with the manganese enzyme from Thermus thermophilus. Biochemistry, v.34, n. 5, p. 1646- 1660, 1995.

54. DUFERNEZ, F. The presence of four iron-containing superoxide dismutase isozymes in trypanosomatidae: characterization, subcellular localization, and phylogenetic origin in Trypanosoma brucei. Free Radical Biology & Medicine, v.40, n. 2, p. 210-225, 2006.

55. CHEN, J.; LI, Y.; WANG, Y. High-level expression and single-step purification of leucyl- tRNA synthetase from Escherichia coli. Protein Expression and Purification, v. 15, n. 1, p. 115-120, 1999.

56. SAMBROOK, J.; RUSSELL, D.W. Molecular Cloning a Laboratory Manual. 3 ed. New York: CSHL Press, 2000. v. 3.

57. ABELSON, J.N. et al. Guide to Protein Purification. London: Academic Press, 1990. v. 182 58. GASTEIGER, E. ExPASy: The proteomics server for in-depth protein knowledge and

analysis. Nucleic Acids Research, v. 31, n. 13, p. 3784-3788, 2003.

59. MARKLUND, S.; MARKLUND, G. Involvement of the superoxide anion radical in the autoxidation of pyrogallol and a convenient assay for superoxide dismutase. European

Jouranl of Biochemistry, v. 47, n. 3, p. 469–474, 1974.

60. BERGFORS, T. M. Protein crystallization. Oxford: Internacional University line, 1999. 61. LESLIE, A.G. The integration of macromolecular diffraction data. Acta Crystallographica

Section D, v. 62, n. 10, p. 48-57, 2006.

62. EVANS P. Scaling and assessment of data quality. Acta Crystallographica Section D, v. 62, n. 10, p.72-82, 2005.

63. USÓN, I.; SHELDRICK, G.M. Advances in direct methods for protein crystallography.

Current Opinion in Structural Biology, v. 9, n. 5, p. 643-648. 1999.

64. BALDWIN, J.M. The structure of human carbonmonoxy haemoglobin at 2.7 Å resolution.

Journal of Molecular .Biology, v. 136, n. 2, p.103-128, 1980.

65. ROSSMAN, M.G.; BLOW,D.M. The Detection of Sub-Units within the Crystallographic Asymmetric Unit. Acta Crystallographica, v.15, p.24-32, 1962.

66. WINN, M.; ISUPOV, M.; MURSHUDOV, G.N. Use of TLS parameters to model anisotropic displacements in macromolecular refinement. Acta Crystallographica Section D, v.57, n. 1, p.122-133, 2001.

67. MURSHUDOV, G.N.; VAGEN A.A.; DODSON, E.J. Refinement of macromolecular structures by the maximum-likelihood method. Acta Crystallographica Section D. v. 53, n. 3, p. 240-255, 1997.

68. EMSLEY, P.; COWTAN, K. Coot: model-building tools for molecular graphics. Acta

Crystallographica Section D. v. 60, n. 12, p. 2126-2132. 2004.

69. MORRIS, R.J.; PERRAKIS, A.; LAMZIN, V.S. ARP/wARP's model-building algorithms. I. The main chain. Acta Crystallographyca Section D, v. 58, n. 2, p. 968-975, 2002.

70. LASKOWSKI, R. A. et al. PROCHECK: a program to check the stereochemical quality of protein structures. Journal of Applied. Crystallography, v. 26, n. 2, p. 283-291, 1993.

71. KATOH, K. et al. MAFFT: a novel method for rapid multiple sequence alignment based on fast Fourier transform. Nucleic Acids Research., v. 30, n. 14, p. 3059-3066, 2002.

72. CLAMP, M. The Jalview Java Alignment Editor. Bioinformatics, v. 20, n. 3, 426-427, 2004. 73. DELANO, W.L. The PyMOL molecular graphics system. San Carlos: DeLano Scientific,

2002.

74. LOCKLESS, S.W.; RANGANATHAN, R. Evolutionarily conserved pathways of energetic connectivity in protein families. Science, v. 286, n. 5438, p. 295-299, 1999.

75. SUEL, G.M. et al. Evolutionarily conserved networks of residues mediate allosteric communication in proteins. Nature Structure Biology., v. 10, n. 1, p. 59-69, 2003.

76. PFAM SERVER. Diponível em: <http:// www.sanger.ac.uk/Software/Pfam/> Acesso em : 12 de setembro de 2007.

77. EXPASY SERVER. Diponível em: <http://www.expasy.ch/> Acesso em: 12 de setembro de 2007.

78. BOUCHER, I.W. et al .The crystal structure of superoxide dismutase from Plasmodium falciparum. BMC Structure Biology., v. 6, n. 20, 2006.

79. STALLINGS, W.C. et al. Iron superoxide dismutase from Escherichia coli at 3.1-A resolution: a structure unlike that of copper/zinc protein at both monomer and dimer levels.

Proccedings of National Academy of Sciences U S A, v. 80, n. 13, p. 3884-3888, 1983.

80. STALLINGS, W.C. et al . The structure of manganese superoxide dismutase from Thermus thermophilus HB8 at 2.4-A resolution. Journal of Biological Chemistry., v. 260, n. 30, p. 16424-1632, 1985.

81. FLÜCKIGER, S. et al. Comparison of the crystal structures of the human manganese superoxide dismutase and the homologous Aspergillus fumigatus allergen at 2-A resolution.

Journal of Immunology, v.168, n. 3, p. 1267-1272, 2002.

82. ALLISON, S.A.; BACQUET, R.J.; MCCAMMON, J.A. Simulation of the diffusion- controlled reaction between superoxide and superoxide dismutase. II. Detailed models.

Biopolymers, v. 27, n. 2, p. 251-69, 1988.

83. YIKILMAZ, E.; RODGERS, D.W.; MILLER, A.F. The crucial importance of chemistry in the structure-function link: manipulating hydrogen bonding in iron-containing superoxide dismutase. Biochemistry, v.45, n. 4, p. 1151-1161, 1997.

84. HUNTER, T. et al. The conserved residue tyrosine 34 is essential for maximal activity of iron-superoxide dismutase from Escherichia coli. Biochemistry, v. 36, n.16, p. 4925-4933, 1997.

85. BORGSTAHL, G.E. et al. The Structure of Human Mitochondrial Mn3+ Superoxide Dismutase Reveals a Novel Tetrameric Interface of Two 4-Helix Bundles. Cell, v. 71, n. 3, p. 107-107, 1992.

86. SOULERE, L. et al. Screening of Plasmodium falciparum iron superoxide dismutase inhibitors and accuracy of the SOD-assays. Bioorganic & Medical Chemistry, v.11, p. 4941– 4944, 2003.

87. WHITTAKER, M.M.; WHITTAKER, J.W. A glutamate bridge is essential for dimer stability and metal selectivity in manganese superoxide dismutase. Journal of Biological Chemistry, v. 273, n. 35, p. 22188-22193, 1998.

88. TELLEZ-VALENCIA, A. et al. Inactivation of triosephosphate isomerase from Trypanosoma cruzi by an agent that perturbs its dimer interface. Journal of Molecular Biology, v. 341, n. 5, p. 1355–1365, 2004.

89. WINTJENS, R. et al. Specificity and phenetic relationships of iron- and manganese- containing superoxide dismutases on the basis of structure and sequence comparisons.

Journal of Biological Chemistry, v. 279, n. 10, p. 9248-54, 2004.

90. WINTJENS, R.; GILIS, D.; ROOMAN, M. Mn/Fe superoxide dismutase interaction fingerprints and prediction of oligomerization and metal cofactor from sequence. Proteins, v. 70, n. 4, p. 1564-1577, 2007.

91. YIKILMAZ, E. et al. How can a single second sphere amino acid substitution cause reduction midpoint potential changes of hundreds of millivolts? Journal of American Chemical Socity., v. 129, n. 32, p. 9927-9940, 2007.

92. YAMAKURA F. et al. Pronounced conversion of the metal-specific activity of superoxide dismutase from Porphyromonas gingivalis by the mutation of a single amino acid (Gly155Thr) located apart from the active site. Biochemistry, v. 42, n. 36, p.10790-10799, 2003.

93. EDWARD, R. A. et al. Distinct metal environment in Fe-substituted manganese superoxide dismutase provides a structural basis of metal specificity. Journal of American Chemical

Socity, v. 120, n. 37, p. 9684-9685, 1998.

94. KWASIGROCH, J.M. SODa : an Mn/Fe superoxide dismutase prediction and design server.

In document Fjernstyring av kjøretøy over 5G/4G (sider 88-100)