Related Experiment Video

Updated: Oct 16, 2026

In vitro Investigation of the MexAB Efflux Pump From Pseudomonas aeruginosa
13:40

In vitro Investigation of the MexAB Efflux Pump From Pseudomonas aeruginosa

Published on: February 17, 2014

[Homologies between integral proteins of the inner membrane of binding protein transport systems in enterobacteria]

E Dassa, M Hofnung

    Annales De L'Institut Pasteur. Microbiologie
    |May 1, 1985
    PubMed

    More Related Videos

    From Constructs to Crystals – Towards Structure Determination of β-barrel Outer Membrane Proteins09:55

    From Constructs to Crystals – Towards Structure Determination of β-barrel Outer Membrane Proteins

    Published on: July 4, 2016

    Producing Gene Deletions in Escherichia coli by P1 Transduction with Excisable Antibiotic Resistance Cassettes08:13

    Producing Gene Deletions in Escherichia coli by P1 Transduction with Excisable Antibiotic Resistance Cassettes

    Published on: September 1, 2018

    Related Concept Videos

    Protein Transport into the Inner Mitochondrial Membrane01:34

    Protein Transport into the Inner Mitochondrial Membrane

    Nuclear encoded mitochondrial precursors are imported to the inner membrane in a multistep process involving two separate translocons, TIM22 and TIM23. TIM23 is a cation-selective pore that remains closed by the N terminal segment of the protein. Negative charges on the TIM23 act as a receptor for the incoming precursor, pulling the positively charged matrix-targeting sequence for peptide insertion and translocation.
    Transport of mitochondrial precursors across the TIM23 channel is driven by...
    Insertion of Single-pass Transmembrane Proteins in the RER01:26

    Insertion of Single-pass Transmembrane Proteins in the RER

    Integral membrane proteins are proteins adhered to the lipid bilayer of a cell organelle or membrane. They can be of two types: transmembrane integral proteins that span the lipid bilayer and monotopic proteins that are attached to either side of the membrane but do not pass through it.
    Integral transmembrane proteins possess transmembrane and extra membrane domains. The transmembrane domains are primarily made of 20-25 hydrophobic amino acids arranged in a helical secondary confirmation. These...
    Multi-pass Transmembrane Proteins and β-barrels01:09

    Multi-pass Transmembrane Proteins and β-barrels

    In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
    α-Helix containing multi-pass transmembrane proteins
    Multi-pass transmembrane proteins such as G-protein-linked receptors (GPCRs) and...
    Protein Translocation Machinery on the ER Membrane01:28

    Protein Translocation Machinery on the ER Membrane

    The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane.
    Sec61 protein conducting channel
    In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
    Structure of Porins01:21

    Structure of Porins

    Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a  motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel precursors...
    Bacterial Translocation and Protein Secretion01:26

    Bacterial Translocation and Protein Secretion

    Bacterial protein secretion involves translocation systems to ensure proteins reach their designated locations, including the plasma membrane, periplasm, outer membrane, or the external environment. These translocation systems are vital for bacterial physiology, supporting processes like membrane assembly, enzymatic activity in the periplasm, and interactions with the external environment. The division of labor between Sec and Tat pathways ensures efficiency in handling proteins with diverse...