23. In glycoproteins, the O-linked GlcNAc is attached to the or sidechains
23. In glycoproteins, the O-linked GlcNAc is attached to the or sidechains
Determine whether the structure, location, and functions describe proteoglycans, peptidoglycan, glycoproteins, or glycolipids. GlcNAc is N-acetylglucosamine; MurNAc is N-acetylmuramic acid. Proteoglycans Peptidoglycan Glycoproteins Glycolipids Structure Location part of proteins at outer surface of plasma membrane, in extracellular matrix, and in blood Functions many functions, including cell adhesion strength for cell envelope Answer Bank glycosaminoglycan covalently joined to a protein at a Ser residue many functions, including acting as hormones bacterial cell wall extracellular matrix; some are integral membrane proteins outer...
Glycoproteins and polypeptides that have carbohydrate groups added post-translationally, what is meant by the terms O-linked and N-linked? Where are these linkages likely to occur in human proteins?
In glycoproteins, to what three amino acids are carbohydrate groups most frequently linked? To what functional group is the glycan linked in each case?
the structure and composition of glycoproteins determines the A.B and O blood groups in humans. explain how this happens and draw the structure of carbohydrates attached to the blood antigen O in the Haworth Projetion, showing the correct glycoside linkages
The following is an example of an O-linked oligosaccharide chain in oligosaccharide is linked to the protein by the side-chain functional B the side-chain functional group of serine or threonine residues. Fuda2-12) Gal(β1-34)GlcNAc(B1-4) aride chain in glycoproteins. The O-linkage means the GlcNAc(a1 )-) Serine GalNAc(al>3) al(B1- 4)GIcNAc(B13) Gal(B1->4)GIcNAc(3)G1>3) Fuc(a22) Draw out this polymer from the following Fischer projections of the monosaccharide. 1) Show each monosaccharide in the Haworth projection and in the Chair conformation for the six-member rings. 2) Show...
Test yourself Many cell surface trans membrane proteins, called glycoproteins, have an attached carbohydrate group, 1. ich faces the extracellular space. This carbohydrate group is attached to the protein when it is still in the rER. Is the carbohydrate attached to the side of the protein that faces the lumen of the rERo the cytosol 2.Explain why the orientation of a transmembrane protein (i.e. which side of the protein faces the inside and which side faces the outside of the...
4. ( pt) Describe the ways that sugars can be linked to proteins to form glycoproteins. Be specific about the types of linkages possible and the amino acids involved. (2 pts) Below is a portion of a glycogen molecule. Use the picture to answer the following questions 5. снон CH,OH ON OH CH,OH Side chain OH 4 1 CH,OH снон CH,OH сн, сн,он он o- OH 0AOH LOAOH OH HOOH CH OH 4 OH OH OH OH 2 What type...
Which is not true about silk fibroin? Residues contain small sidechains (like alanine and glycine). O It is a form of tertiary structure O It contains parallel beta-sheets O The peptide strands are tightly packed to enhance tensile strength.
Which is not true about silk fibroin? Residues contain small sidechains (like alanine and glycine). O It is a form of tertiary structure o It contains parallel beta-sheets The peptide strands are tightly packed to enhance tensile stroneth