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tuberculosis/proline

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Acetohydroxyacid synthase (AHAS) of Mycobacterium tuberculosis is a promising target for the development of anti-tuberculosis agents. With the absence of an available bacterial AHAS crystal structure, that of M. tuberculosis, site-directed mutagenesis has been a useful tool for determining its

Kinetic and isotopic characterization of L-proline dehydrogenase from Mycobacterium tuberculosis.

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The monofunctional proline dehydrogenase (ProDH) from Mycobacterium tuberculosis performs the flavin-dependent oxidation of l-proline to Δ(1)-pyrroline-5-carboxylate in the proline catabolic pathway. The ProDH gene, prub, was cloned into the pYUB1062 vector, and the C-terminal His-tagged 37 kDa
The proline-utilization pathway in Mycobacterium tuberculosis (Mtb) has recently been identified as an important factor in Mtb persistence in vivo, suggesting that this pathway could be a valuable therapeutic target against tuberculosis (TB). In Mtb, two distinct enzymes perform the conversion of
Cells of the monocyte/macrophage lineage are shown to play a role in the pathogenesis of human immunodeficiency virus (HIV). The occurrence of HIV type 1 (HIV-1) infection is found to be accelerated in people infected with Mycobacterium tuberculosis, but the mechanism by which mycobacterial
Proteins that are actively secreted by Mycobacterium tuberculosis serve as major targets of immune responses in the infected host. To identify and purify novel proteins in the filtrates of M. tuberculosis cultures, a bacteriophage lambda library of M. tuberculosis H37Rv DNA was immunoscreened by
Bacillus Calmette-Guerin vaccine confers insufficient pulmonary protection against tuberculosis (TB), particularly the Mycobacterium tuberculosis (Mtb) Beijing strain infection. Identification of vaccine antigens (Ags) by considering Mtb genetic diversity is crucial for the development
Type I interferons (IFN), best known for their anti-viral functions, have been shown to impair host resistance to intracellular bacteria in mice. However, the precise role of type I IFN signaling in bacterial infection in humans is unclear. Here, we show that genetic variation in the human IFNAR1
A surrogate expression system, based on fusions to the phoA bacterial reporter gene, was used to identify Mycobacterium tuberculosis genes that encode exported proteins and the promoter regions required for their expression in the heterologous host Mycobacterium smegmatis. To assess these results in
The glycoprotein APA (Alanine- and Proline-rich Antigen, a 45/47 kDa antigen complex, Rv1860) is considered as a major immunodominant antigen secreted by M. tuberculosis. This antigen has proved to be highly immunogenic in experimental models and humans, presenting a significant potential for
We have conducted a survey of proline-rich (PxxP) motifs in the proteomes of human, mouse, yeast, Mycobacterium tuberculosis and Plasmodium falciparum. Our analyses reveal a strikingly high occurrence of these motifs in each organism, suggesting a wide dependence on protein-protein interaction

Biosynthesis of methyl-proline containing griselimycins, natural products with anti-tuberculosis activity.

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Griselimycins (GMs) are depsidecapeptides with superb anti-tuberculosis activity. They contain up to three (2S,4R)-4-methyl-prolines (4-MePro), of which one blocks oxidative degradation and increases metabolic stability in animal models. The natural congener with this substitution is only a minor
The proline-glutamic acid (PE) protein family of Mycobacterium tuberculosis (Mtb) plays diverse roles in the pathogenesis and modulation of host immune responses. The uniqueness of conserved regions of PE proteins may be useful to test and validate their corresponding functions. Hence, the present
We have investigated the in vitro activity of antimicrobial peptides against Mycobacterium tuberculosis using a radiometric method and cfu determinations. PR-39, a proline-arginine-rich antibacterial peptide from porcine leucocytes, was found to be active against drug-susceptible as well as

Atomic structure of Mycobacterium tuberculosis CYP121 to 1.06 A reveals novel features of cytochrome P450.

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The first structure of a P450 to an atomic resolution of 1.06 A has been solved for CYP121 from Mycobacterium tuberculosis. A comparison with P450 EryF (CYP107A1) reveals a remarkable overall similarity in fold with major differences residing in active site structural elements. The high resolution

Roles of conserved proline and glycosyltransferase motifs of EmbC in biosynthesis of lipoarabinomannan.

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D-Arabinans, composed of D-arabinofuranose (D-Araf), dominate the structure of mycobacterial cell walls in two settings, as part of lipoarabinomannan (LAM) and arabinogalactan, each with markedly different structures and functions. Little is known of the complexity of their biosynthesis.
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