Photosynthetic Accessory Proteins with Bilin Prosthetic Groups

摘要: Publisher Summary This chapter discusses photosynthetic accessory proteins with bilin prosthetic groups. Phycobiliproteins absorb light maximally between 450 and 650 nm. In cells grown at low intensity, the intracellular concentrations of these can be very high. Phycobiliproteins, as a family, have certain characteristics in common. Each is an oligomer single type monomer, αβ, made up two dissimilar polypeptide chains. These chains carry covalently bound tetrapyrrole groups, whose chemical nature number large measure determine absorption properties chromoprotein. The phycobiliproteins cyanobacteria red algae are similar amino acid sequences, physical immunological properties, organization. cryptomonads different several respects. groups open-chain tetrapyrroles, called phycobilins. Unlike other pigments, such chlorophylls carotenoids, which not attached to proteins, phycobilins linked apoproteins by covalent bonds.