tuberculosis/protease

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Updated guidelines for the use of rifabutin or rifampin for the treatment and prevention of tuberculosis among HIV-infected patients taking protease inhibitors or nonnucleoside reverse transcriptase inhibitors.

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A previously published report provided guidelines for managing the pharmacologic interactions that can result when patients receive protease inhibitors and nonnucleoside reverse transcriptase inhibitors (NNRTIs) for treatment of human immunodeficiency virus (HIV) infection together with rifamycins

Mutation analysis of the interactions between Mycobacterium tuberculosis caseinolytic protease C1 (ClpC1) and ecumicin.

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Ecumicin is a well-known and potent inhibitor of Mycobacterium tuberculosis. Although the target of ecumicin is caseinolytic protease C1 (ClpC1), the exact mechanism by which ecumicin inhibits ClpC1 has not been identified. To analyze ecumicin's action on ClpC1, site-directed mutagenesis was

Protease inhibitor-containing antiretroviral treatment and tuberculosis: can rifabutin fill the breach?

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OBJECTIVE To assess how to best manage co-administration of rifabutin (RFB) and human immunodeficiency virus 1 (HIV-1) protease inhibitor (PI) containing antiretroviral treatment (ART). Recommended for initial anti-tuberculosis treatment, rifampicin (RMP) lowers PI concentrations below therapeutic

Structural basis for the in vitro known acyl-depsipeptide 2 (ADEP2) inhibition to Clp 2 protease from Mycobacterium tuberculosis.

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Inhibition of Mycobacterium tuberculosis Clp 2 protease has emerged as an attractive therapeutic option for treatment. Acyldepsipeptides (ADEPs) is known as an inhibitor for Clp 2 protease. Therefore, it is of interest to document its affinity, enzyme activity and ADME profiles. We report the

Host defense responses to infection by Mycobacterium tuberculosis. Induction of IRF-1 and a serine protease inhibitor.

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Alveolar macrophages and newly recruited monocytes are targets of infection by Mycobacterium tuberculosis. Therefore, we examined the expression of interferon regulatory factor 1 (IRF-1), which plays an important role in host defense against M. tuberculosis, in undifferentiated and differentiated

The Mycobacterium tuberculosis ClpP1P2 Protease Interacts Asymmetrically with Its ATPase Partners ClpX and ClpC1.

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Clp chaperone-proteases are cylindrical complexes built from ATP-dependent chaperonerings that stack onto a proteolytic ClpP double-ring core to carry out substrate protein degradation.Interaction of the ClpP particle with the chaperone is mediated by an N-terminal loop and a hydrophobic surface

Insights into the inter-ring plasticity of caseinolytic proteases from the X-ray structure of Mycobacterium tuberculosis ClpP1.

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Mycobacterium tuberculosis caseinolytic protease ClpP1 (Mt ClpP1) is a self-compartmentalized protease consisting of two heptameric rings stacked on top of each other, thus enclosing a catalytic chamber. Within the chamber, which can be reached through two axial pores, each of the 14 identical

Mycobacterial excretory secretory-31 protein with serine protease and lipase activities: An immunogen and drug target against tuberculosis infection.

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OBJECTIVE Tuberculosis (TB) has been declared as a global emergency by the World Health Organization in 1993 and still remains one of the world's biggest threats. Worldwide, 9.6 million people have been estimated to have fallen ill with TB in 2014: 5.4 million men, 3.2 million women, and 1.0 million

The HtrA-like serine protease PepD interacts with and modulates the Mycobacterium tuberculosis 35-kDa antigen outer envelope protein.

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Mycobacterium tuberculosis remains a significant global health concern largely due to its ability to persist for extended periods within the granuloma of the host. While residing within the granuloma, the tubercle bacilli are likely to be exposed to stress that can result in formation of aberrant

Functional characterization of AAA family FtsH protease of Mycobacterium tuberculosis.

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FtsH is a membrane-bound ATP-dependent zinc-metalloprotease which proteolytically regulates the levels of specific membrane and cytoplasmic proteins that participate in diverse cellular functions, and which therefore might be of critical importance to a human pathogen such as Mycobacterium

The Rip1 protease of Mycobacterium tuberculosis controls the SigD regulon.

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Regulated intramembrane proteolysis of membrane-embedded substrates by site-2 proteases (S2Ps) is a widespread mechanism of transmembrane signal transduction in bacteria and bacterial pathogens. We previously demonstrated that the Mycobacterium tuberculosis S2P Rip1 is required for full virulence in

Rifamycin-resistant Mycobacterium tuberculosis in the highly active antiretroviral therapy era: a report of 3 relapses with acquired rifampin resistance following alternate-day rifabutin and boosted protease inhibitor therapy.

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Rifamycin-resistant Mycobacterium tuberculosis infection (i.e., by a strain of M. tuberculosis that is only resistant to rifamycins) occurs disproportionately among patients infected with the human immunodeficiency virus (HIV) who have a low CD4 cell count. We observed 3 genetically confirmed cases

Missense Mutations in the Unfoldase ClpC1 of the Caseinolytic Protease Complex Are Associated with Pyrazinamide Resistance in Mycobacterium tuberculosis.

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Previously, we showed that mutations in Mycobacterium tuberculosis panD, involved in coenzyme A biosynthesis, cause resistance against pyrazinoic acid, the bioactive component of the prodrug pyrazinamide. To identify additional resistance mechanisms, we isolated mutants resistant against pyrazinoic

Cloning and expression of the gene coding for FtsH protease from Mycobacterium tuberculosis H37Rv.

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This study was aimed at the molecular cloning and expression of the gene coding for FtsH protease of Mycobacterium tuberculosis H37Rv (virulent). PCR on the genomic DNA of M. tuberculosis H37Ra (non-virulent) using the oligodeoxynucleotide primers, which were designed based on the codon usage

Induction of serine protease inhibitor 9 by Mycobacterium tuberculosis inhibits apoptosis and promotes survival of infected macrophages.

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Our recent microarray analysis of infected human alveolar macrophages (AMs) found serine protease inhibitor 9 (PI-9) to be the most prominently expressed of a cluster of apoptosis-associated genes induced by virulent Mycobacterium tuberculosis. In the current study, we show that induction of PI-9

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