Flavodoxin
Encyclopedia
Flavodoxins are electron-transfer proteins. Flavodoxin is a bacteria
l protein
that includes flavin mononucleotide
. The structure of flavodoxin is characterized by a five-stranded parallel beta sheet
, surrounded by alpha helices at either side of the sheet. They have been isolated from prokaryotes, cyanobacteria, and some eukaryotic algae.
Bacteria
Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...
l protein
Protein
Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of...
that includes flavin mononucleotide
Flavin mononucleotide
Flavin mononucleotide , or riboflavin-5′-phosphate, is a biomolecule produced from riboflavin by the enzyme riboflavin kinase and functions as prosthetic group of various oxidoreductases including NADH dehydrogenase as well as cofactor in biological blue-light photo receptors...
. The structure of flavodoxin is characterized by a five-stranded parallel beta sheet
Beta sheet
The β sheet is the second form of regular secondary structure in proteins, only somewhat less common than the alpha helix. Beta sheets consist of beta strands connected laterally by at least two or three backbone hydrogen bonds, forming a generally twisted, pleated sheet...
, surrounded by alpha helices at either side of the sheet. They have been isolated from prokaryotes, cyanobacteria, and some eukaryotic algae.