Biochemistry 2280A Lecture : Levels of Protein Structure

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orchidotter238

20 Dec 2011

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Less than 50% of the average is secondary structure. Hydrogen bonding to an electronegative atom requires 3 atoms to do so. All depend on hydrogen bonding between the backbone (secondary structures) Hydrogen bonds form when a hydrogen atom is sandwiched between two electron-attracting atoms (usually o or n) Hydrogen bonds can occur between the polypeptide backbone and water, and the protein backbone and other neighbouring polypeptides. Side chains stick out due to the lack of interior space. Proline causes a kink problem alpha helix breaks. Beta sheets follow the same bonding rules as the alpha. The bonding is still hydrogen not side chain. Beta sheets run in 2 ways anti parallel the n terminus of one is butted beside the. Parallel beta sheets all have the same c and n lined up, main. In parallel it involves wrapping around of the peptide chain.

Related Questions

a. in the alpha helix, the amino acid side chains project outfrom the coiled backbone of the polypeptide chain

b. the peptide bond is one kind of amide linkage

c. other than peptide bonds, hydrogen bonding is the mostimportant interaction in pleated sheet and alpha helicalstructures

d. the native state of a protein is the least stable from undercellular conditions

e. Globular proteins often contain a pocket or groove into whicha prosthetic group of substrate can fit

The sequence of amino acids is considered to be the ________ structure of a protein.

Select one:

a. secondary

b. tertiary

c. quaternary

d. primary

The pattern the backbone folds, for example alpha-helix or beta pleated sheet, is the ________ structure of a protein.

Select one:

a. quaternary

b. secondary

c. tertiary

d. primary

Which type of forces stabilizes the primary structure of a protein?

Select one:

a. Salt bridges

b. Hydrogen bonding between the carbonyl group and amino group

c. Dipole-dipole

d. Peptide bonds

The interaction of the side chains on the amino acids, for example hydrophobic attractions, is the ________ structure of a protein.

Select one:

a. quaternary

b. secondary

c. tertiary

d. primary

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Biochemistry 2280A Lecture : Levels of Protein Structure

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