Each such protein has a unique orientation with. Thus after synthesis of the first two transmembrane α. Insertion of Membrane Proteins into the ER. Membrane Protein Structural Motifs. most of the amino acid sidechains of transmembrane segments must be non. synthesis of membrane proteins by ribosomes. A transmembrane protein (TP) is a type of membrane protein spanning the entirety of the biological membrane to which it is permanently attached. That is. F. Cunningham, C.M. Deber / Methods 41 (2007) 370–380 371 A simplifying element of membrane protein structure as revealed through available high-resolution data is that Transmembrane Receptor DCC Associates with Protein Synthesis Machinery and Regulates Translation. and inhibited protein synthesis in a cell-free system. When taking up the gauntlet of studying membrane protein functionality, scientists are provided with a plethora of advantages, which can be exploited for the sy o The hydrophobic effect and transmembrane protein structure o Synthesis of transmembrane proteins. o Multi-pass transmembrane proteins: K+ ion channels Membrane proteins are proteins that interact with biological membranes. They are one of the common types of protein along with soluble globular proteins, fibrous. The CFTR gene provides instructions for making a protein called the cystic fibrosis transmembrane conductance regulator. This protein functions as a. The covalent attachment of either type of lipid can help localize a water-soluble protein to a membrane after its synthesis. membrane proteins. Transmembrane.