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FtsZ is a protein encoded by the ftsZ gene that assembles into a ring at the future site of bacterial cell division (also called the Z ring).FtsZ is a prokaryotic homologue of the eukaryotic protein tubulin.
Porins are water-filled pores and channels found in the membranes of bacteria and eukaryotes. Porin-like channels have also been discovered in archaea. [7] Note that the term "nucleoporin" refers to unrelated proteins that facilitate transport through nuclear pores in the nuclear envelope.
General bacterial porins are a family of porin proteins from the outer membranes of Gram-negative bacteria. The porins act as molecular filters for hydrophilic compounds. [ 1 ] They are responsible for the ' molecular sieve ' properties of the outer membrane.
Bacterial microcompartments are widespread, organelle-like structures that are made of a protein shell that surrounds and encloses various enzymes. provide a further level of organization; they are compartments within bacteria that are surrounded by polyhedral protein shells, rather than by lipid membranes. These "polyhedral organelles ...
A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red).
Outer membrane proteins consist of two major classes of protein - transmembrane proteins and lipoproteins. The transmembrane proteins form channels or pores in the membrane called porins, and actively pumping efflux channels. [5] The outer membranes of a bacterium can contain a huge number of proteins.
In molecular biology, bacterial DNA binding proteins are a family of small, usually basic proteins of about 90 residues that bind DNA and are known as histone-like proteins. [ 1 ] [ 2 ] Since bacterial binding proteins have a diversity of functions, it has been difficult to develop a common function for all of them.
A ribosomal protein (r-protein or rProtein [1] [2] [3]) is any of the proteins that, in conjunction with rRNA, make up the ribosomal subunits involved in the cellular process of translation. E. coli, other bacteria and Archaea have a 30S small subunit and a 50S large subunit, whereas humans and yeasts have a 40S small subunit and a 60S large ...