Cloning of the fomA gene, encoding the major outer membrane porin of Fusobacterium nucleatum ATCC10953

Microbial Pathogenesis
H B JensenJ Tommassen

Abstract

The major outer membrane protein, FomA, of the Gram-negative human oral pathogen Fusobacterium nucleatum functions as a porin and is assumed to act as a receptor protein in coaggregation with other oral pathogenic bacteria such as Streptococcus sanguis and Porphyromonas gingivalis. We describe here the cloning of fomA from F. nucleatum in E. coli. Using pGEM3Zf(+), three recombinant plasmids were carrying parts of the fomA gene, but none of these contained regions upstream of the coding sequence. From these plasmids a clone was constructed which contained the whole fomA gene. The ATCC 10953 fomA gene was cloned under the phosphate limitation-inducible phoE promoter, using a vector derived from pACYC184. The protein was found to be incorporated into the outer membrane of the host in an apparently normal manner, as judged by heat-modifiability, trypsin-accessibility, and accessibility to antibodies to the protein in a whole cell enzyme-linked immunosorbent assay. The cloned FomA was found to exhibit pore-forming activity.

Citations

May 25, 2012·Clinical and Vaccine Immunology : CVI·Deana N ToussiPaola Massari
Dec 22, 2005·Infection and Immunity·Andrew M EdwardsJoel D Rudney
Aug 13, 2009·Analytical and Bioanalytical Chemistry·Jesper S HansenClaus H Nielsen

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.