Porin (protein) - Wikipedia
en.wikipedia.org › wiki › Porin_(protein)Porins are beta barrel proteins that cross a cellular membrane and act as a pore, through which molecules can diffuse. Unlike other membrane transport proteins, porins are large enough to allow passive diffusion, i.e., they act as channels that are specific to different types of molecules. They are present in the outer membrane of gram-negative bacteria and some gram-positive mycobacteria, the outer membrane of mitochondria, and the outer chloroplast membrane.
Porin (Protein) - an overview | ScienceDirect Topics
www.sciencedirect.com › porin-proteinPorin (Protein) Porin proteins occur in two major antigenic classes, designated PorB1A and PorB1B, each of which is composed of many distinct genetic variants. From: Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases (Eighth Edition), 2015. Related terms: Mitochondrion; Lipopolysaccharide; Antibiotics; Beta Barrel; Nested Gene
Porins | Encyclopedia.com
www.encyclopedia.com › porinsPorins are proteins that are located in the outer membrane of Gram-negative bacteria . They function to form a water-filled pore through the membrane, from the exterior to the periplasm , which is a region located between the outer and inner membranes.
Outer Membrane Porins - PubMed
pubmed.ncbi.nlm.nih.gov › 31214985Abstract. The transport of small molecules across membranes is essential for the import of nutrients and other energy sources into the cell and, for the export of waste and other potentially harmful byproducts out of the cell. While hydrophobic molecules are permeable to membranes, ions and other small polar molecules require transport via specialized membrane transport proteins .
Porin - an overview | ScienceDirect Topics
www.sciencedirect.com › porinPorin. Porins also possess an internal hydrophilic channel or pore that permits the passage of small macromolecules, such as glucose or maltose amongst others, from the external environment to the cell interior. From: Molecular Medical Microbiology (Second Edition), 2015. Related terms: Mitochondrion; Antibiotics; Enzymes; Mutation; Proteins; Gram-Negative Bacteria