scholarly journals Immunization against Lamb Haemonchosis with a Recombinant Somatic Antigen ofHaemonchus contortus(rHcp26/23)

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Leticia García-Coiradas ◽  
Francisco Angulo-Cubillán ◽  
Basilio Valladares ◽  
Enrique Martínez ◽  
Concepción de la Fuente ◽  
...  
Keyword(s):  
Recombinant Dna ◽  
Soluble Fraction ◽  
Parasitic Disease ◽  
Significant Protection ◽  
Recombinant Dna Technology ◽  
Specific Antibody Response ◽  
Partial Protection ◽  
Synthetic Protein ◽  
Immunological Assays ◽  
And Control

Haemonchosis, caused by the abomasal nematodeHaemonchus contortus, is a common parasitic disease of sheep. Our previous results showed that a soluble fraction from adult stages of the nematode (p26/23) induced partial protection against challenge. Recombinant DNA technology was applied to obtain a synthetic protein (rHcp26/23). Immunological assays (ELISA, Western blotting, and immunolocalization), using sera from lambs immunized with p26/23, confirmed the identity of the recombinant protein and demonstrated that the synthetic protein is equivalent to the purified protein employed in the previous immunoprophylaxis studies. Vaccination of lambs with 300 μgof rHcp26/23 and Freund's adjuvant elicited a notable specific antibody response. Immunization did not induce any significant protection after challenge with 16000 infective larvae ofH. contortus, and comparable values for parasite faecal egg output, packed cell volume, and abomasal parasite burdens were found in vaccinated and control animals.

Enzymatic Synthesis of 15N-L-aspartic Acid Using Recombinant Aspartase from Escherichia Coli K12

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Iulia Lupan ◽  
Sergiu Chira ◽  
Maria Chiriac ◽  
Nicolae Palibroda ◽  
Octavian Popescu
Keyword(s):  
Amino Acids ◽  
Aspartic Acid ◽  
Enzymatic Synthesis ◽  
Large Scale ◽  
Recombinant Dna ◽  
Industrial Enzymes ◽  
Recombinant Dna Technology ◽  
Bacterial Fermentation ◽  
Natural Protein ◽  
Novel Method

Amino acids are obtained by bacterial fermentation, extraction from natural protein or enzymatic synthesis from specific substrates. With the introduction of recombinant DNA technology, it has become possible to apply more rational approaches to enzymatic synthesis of amino acids. Aspartase (L-aspartate ammonia-lyase) catalyzes the reversible deamination of L-aspartic acid to yield fumaric acid and ammonia. It is one of the most important industrial enzymes used to produce L-aspartic acid on a large scale. Here we described a novel method for [15N] L-aspartic synthesis from fumarate and ammonia (15NH4Cl) using a recombinant aspartase.

scholarly journals Protein-Engineered Polymers Functionalized with Antimicrobial Peptides for the Development of Active Surfaces

2021 ◽  
Vol 11 (12) ◽  
pp. 5352
Author(s):  
Ana Margarida Pereira ◽  
Diana Gomes ◽  
André da Costa ◽  
Simoni Campos Dias ◽  
Margarida Casal ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Peptides ◽  
Recombinant Dna ◽  
Biological Properties ◽  
Resistant Bacteria ◽  
Recombinant Dna Technology ◽  
Free Standing ◽  
Microbial Cell Factories ◽  
Cell Factories ◽  
Antimicrobial Materials

Antibacterial resistance is a major worldwide threat due to the increasing number of infections caused by antibiotic-resistant bacteria with medical devices being a major source of these infections. This suggests the need for new antimicrobial biomaterial designs able to withstand the increasing pressure of antimicrobial resistance. Recombinant protein polymers (rPPs) are an emerging class of nature-inspired biopolymers with unique chemical, physical and biological properties. These polymers can be functionalized with antimicrobial molecules utilizing recombinant DNA technology and then produced in microbial cell factories. In this work, we report the functionalization of rPBPs based on elastin and silk-elastin with different antimicrobial peptides (AMPs). These polymers were produced in Escherichia coli, successfully purified by employing non-chromatographic processes, and used for the production of free-standing films. The antimicrobial activity of the materials was evaluated against Gram-positive and Gram-negative bacteria, and results showed that the polymers demonstrated antimicrobial activity, pointing out the potential of these biopolymers for the development of new advanced antimicrobial materials.

scholarly journals Biotin Production by Using Recombinant DNA Technology

1992 ◽  
Vol 38 (Special) ◽  
pp. 263-266
Author(s):  
O. IFUKU ◽  
S. HAZE ◽  
J. KISHIMOTO ◽  
M. YANAGI
Keyword(s):  
Recombinant Dna ◽  
Recombinant Dna Technology ◽  
Dna Technology
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