Mitochondrial porins or voltage-dependent anion-selective channels are channel-forming proteins mainly found in the mitochondrial outer membrane. Genome sequencing of the fruit fly Drosophila melanogaster revealed the presence of three additional porin-like genes. No functional information was available for the different gene products. In this work we have studied the function of the gene produ...

Gram-negative bacteria cause the majority of highly drug-resistant bacterial infections. To cross outer membrane complex cell envelope, antibiotics permeate through porins, trimeric channel proteins that enable exchange small polar molecules. Mutations in porins contribute to development phenotypes. In this work, we show a single point mutation porin PorB from Neisseria meningitidis, causative ...

Nineteen clonally related imipenem-resistant Acinetobacter baumannii isolates were recovered from eight intensive care unit patients. All isolates harboured bla OXA-51-like β-lactamase genes and showed the absence of 22 kDa fraction in outer membrane porin profile analysis. It suggests a combination of two mechanisms as responsible for carbapenem-resistant phenotypes.

Oligogalacturonide (OGA)-specific porins of the KdgM family have previously been identified and characterized in enterobacterial plant pathogens. We found that deletion of the gene encoding response regulator OmpR causes the porin KdgM2 to become one of the most abundant proteins in the outer membrane of the human enteropathogen Yersinia enterocolitica. Reporter gene fusion and real-time PCR an...

Antimicrobial Susceptibility Pattern and Mutations of Outer Membrane Porin in Clinical Isolates Klebsiella pneumoniae

OBJECTIVES The global spread and increasing incidence of carbapenem non-susceptible Klebsiella pneumoniae (CnSKP) has made its treatment difficult, increasing the mortality. To establish nationwide data on CnSKP spread and carbapenem-resistance mechanisms, we conducted a national surveillance study in Taiwanese hospitals. METHODS We collected 100 and 247 CnSKP isolates in 2010 and 2012, respe...

Abstract A major challenge in the treatment of infections has been rise extensively drug resistance (XDR) and multidrug (MDR) Acinetobacter baumannii . The goals this study were to determine pattern antimicrobial susceptibility, bla OXA carO genes among burn-isolated A. strains. In study, 100 strains isolated from burn patients their susceptibilities different antibiotics determined using disc ...

Mitochondrial creatine kinase (MtCK) co-localizes with mitochondrial porin (voltage-dependent anion channel) and adenine nucleotide translocator in mitochondrial contact sites. A specific, direct protein-protein interaction between MtCK and mitochondrial porin was demonstrated using surface plasmon resonance spectroscopy. This interaction was independent of the immobilized binding partner (pori...

Clinical isolates of carbapenem-resistant Klebsiella pneumoniae (K. pneumoniae) strains are being increased worldwide. Five pan-resistant K. pneumoniae strains have been isolated from respiratory and ICU wards in a Chinese hospital, and reveal strong resistance to all β-lactams, fluoroquinolones and aminoglycosides. Totally 27 β-lactamase genes and 2 membrane pore protein (porin) genes in 5 K. ...

Porins from outer membrane of Gram-negative bacteria have a highly stable structure. Our previous studies on porin from Paracoccus denitrificans showed that the outer membrane protein porin is extremely stable toward heat, pH, and chemical denaturants. The major question we have addressed in this paper is whether the high stability of porin is a consequence of the beta-barrel structure and whet...