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Bowman-Birk protease inhibitor from Vigna unguiculata seeds enhances the action of Bradykinin-Related peptides. Repositório Alice
ÁLVARES, A. da C. M.; SCHWARTZ, E. F.; AMARAL, N. O.; TRINDADE, N. R.; PEDRINO, G. R.; SILVA, L. P.; FREITAS, S. M. de.
Tipo: Separatas Palavras-chave: Arterial blood pressure; Circular dichroism; Dynamic light scattering; Fluorescence spectroscopy.; Bowman-Birk inhibitor; Bradykinin..
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1006020
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Effects of 60Co gamma radiation on crotamine BJMBR
Boni-Mitake,M.; Costa,H.; Spencer,P.J.; Vassilieff,V.S.; Rogero,J.R..
Ionizing radiation can change the molecular structure and affect the biological properties of biomolecules. This has been employed to attenuate animal toxins. Crotamine is a strongly basic polypeptide (pI 10.3) from Crotalus durissus terrificus venom composed of 42 amino acid residues. It induces skeletal muscle spasms leading to a spastic paralysis of hind limbs in mice. The objective of the present study was to carry out a biochemical study and a toxic activity assay on native and irradiated crotamine. Crotamine was purified from C.d. terrificus venom by Sephadex G-100 gel filtration followed by ion-exchange chromatography, and irradiated at 2 mg/ml in 0.15 M NaCl with 2.0 kGy gamma radiation emitted by a 60Co source. The native and irradiated toxins...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crotamine; Gamma radiation; Chromatography; Toxicity; Circular dichroism.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001200004
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Purification and partial characterization of a lectin from Caesalpinia tinctoria Domb, ex Dc fruits Braz. J. Plant Physiol.
Oliveira,Marli Lourdes de; Beltramini,Leila Maria; Simone,Salvatore Giovanni de; Brumano,Maria Helena Nasser; Silva-Lucca,Rosemeire Aparecida; Nakaema,Marcelo Kiyoshi Kian; Pires,Christiano Vieira; Oliveira,Maria Goreti de Almeida.
A lectin was isolated from the pod saline extract of Caesalpinia tinctoria by dialoconcentration on Centripep-10 and affinity chromatography on chitin column. The purified lectin was partially characterized with respect to its biochemical and structural properties. It contains 8.3 % of carbohydrate and exhibited an agglutinating activity against human erythrocytes (ABO groups). Its amino acid composition was characterized by a great number of acidic and hydrophobic residues and the estimated molecular mass was 12.5 kDa. The presence of only one N-terminal amino acid sequence (D¹-V-P-A-Y-V-Y-V-H-F10-G-F-G-E-E-H-R -D-V-F20-D), showed the homogeneity of the purified lectin. The far-ultraviolet circular dichroism (CD) spectrum of lectin indicated that it...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Circular dichroism; Leguminosae; Plant defense; Pod; Secondary structure.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200008
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Spectroscopic studies on the interaction of efonidipine with bovine serum albumin BJMBR
Wang,N.; Ye,L.; Zhao,B.Q.; Yu,J.X..
Efonidipine hydrochloride is an antihypertensive and antianginal agent with fewer side effects and is better tolerated in the treatment of hypertension with renal impairment. Its interaction with bovine serum albumin (BSA) is of great use for the understanding of the pharmacokinetic and pharmacodynamic mechanisms of the drug. The binding of efonidipine to BSA was investigated by fluorescence spectroscopy and circular dichroism. BSA fluorescence was quenched by efonidipine, due to the fact that efonidipine quenched the fluorescence of tryptophan residues mainly by the collision mode. The thermodynamic parameters ΔH0 and ΔS0 were 68.04 kJ/mol and 319.42 J·mol-1·K-1, respectively, indicating that the hydrophobic interactions played a major role. The results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Efonidipine; Bovine serum albumin; Fluorescence quenching; Synchronous fluorescence; Circular dichroism.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000700007
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