Asian Journal of Biochemistry1815-99231815-9931Academic Journals Inc.10.3923/ajb.2009.77.87Capsicum chinense Seed Peptide Fraction with Broad Antibacterial Activity]]>Brito-ArgaezL. Moguel-SalazarF. ZamudioF. Gonzalez-EstradaT. Islas-FloresI. 3200943Habanero chili pepper (Capsicum chinense) is widely consumed as a fresh vegetable, although its extremely high capsaicin content has led to other uses (e.g., medicine and self-defense). Recently described antimicrobial peptides from C. annuum were very efficient in inhibiting growth in human and plant pathogenic bacteria and fungi. In order to explore the potential use of Capsicum chinense seeds as a source of antimicrobial peptides, in the present study a peptide fraction from C. chinense pepper seeds, denominated G10P1, was enriched, partially purified and its antimicrobial activity tested against the plant and human pathogens Xanthomonas campestris, Pseudomonas syringae, Pseudomonas aeruginosa, Erwinia carotovora, Agrobacterium sp., Shigella flexnerii, Escherichia coli, Staphyllococcus aureus and Bacillus subtilis. The minimum inhibitory concentration of the G10P1 peptide fraction against X. campestris was 12.5 μg mL-1. Electrophoresis of the G10P1 in a denaturant 15% polyacrylamide gel showed it to be composed of ~7.57 and ~5.6 kDa polypeptides, both associated with an area of strong antibacterial activity. The sequencing of 18 amino acids from the N-terminal of the ~7.57 peptides and 12 from the ~5.6 kDa peptides showed no clear association with previously described antimicrobial peptides. However, the ~5.6 kDa peptides were related to the NAC and WRKY transcription factors, both involved in direct regulation of the plant defense response against pathogen attack and the ~7.57 kDa peptides had low homology with a 3-oxo-[acyl-carrier-protein] synthase from Capsicum chinense.]]>Agrios, G.N.,20055th Edn.,Pages: 922Pages: 922Alcorn, J.B.,19841st Edn.,pp: 982pp: 982Aluru, M., J. Curry and M.A. O'Connell,1999120343633Aluru, M., J. Curry and M.A. O'Connell,199811811011102Bradford, M.M.,197672248254Castro, M.S. and W. Fontes,2005121116Cichewicz, R.H. and P.A. Thorpe,1996Capsicum species) and their uses in Mayan medicine.]]>526170Cordell, G.A. and O.E. Araujo,199327330336Diz, M.S.S., A.O. Carvalho, R. Rodriguez, A.G.C. Neves-Ferreira and M. Da Cunha et al.,2006176013231332Hancock, R.E.W. and R.I. Lehrer,1998168288Islas-Flores, I., T. Gonzalez-Estrada and M.A. Villanueva,20052005pp: 121-132pp: 121-132Jensen, M.K., J.H. Rung, P.L. Gregersen, T. Gjetting and A.T. Fuglsang et al.,2007Arabidopsis.]]>65137150Kelemu, S., C. Cardona and G. Segura,2004Clitoria ternatea, a tropical forage legume.]]>42867873Kimati, H., L. Amorim, A. Bergamim-Filho, L.E.A. Camargo and J.A.M. Rezende,19973rd Edn.,Lay, F.T. and M.A. Anderson,2005685101Laemmli, U.K.,1970227680685Moguel-Salazar, F., A. Quijano-Ramayo, M. Keb-Llanes, O. Valenzuela-Moreno and I. Islas-Flores,2007Pseudomonas spp from diseased Capsicum chinense (Habanero pepper) plants in Yucatan, Mexico.]]>155470474Montesinos, E.,2007270111Mygind, P.H., R.L. Fischer, K.M. Schnorr, M.T. Hansen and C.P. Sonken et al.,2005473975980Surh, Y.J. and S.S. Lee,19955618451855Tellez, G.I., L. Jaeger, C.E. Dean, D.E. Corrier and J.R. DeLoach,199337143148Texeira, F.R., M.C.O.P. Lima, H.O. Almeida, R.S. Romeiro and D.J.H. Silva et al.,2006Ralstonia solanacearum and Clavibacter michiganensis ssp. michiganensis growth.]]>154418421Turnbull, P.C.B. and J.M. Kramer,1991Bacillus.]]>1991pp: 296-303pp: 296-303Zasloff, M.,2002415389395Zheng, Z., S.L. Mosher, B. Fan, D.F. Klessig and Z. Chen,2007Arabidopsis WRKY25 transcription factor in plant defense against Pseudomonas syringae.]]>722