아미노산, 근육의 기능과 대사에 대하여
Amino acids metabolism.pdf
Three Dimensional Structure of Proteins
Three Dimensional Structure of Proteins.pdf
Four levels of structure
Primary--amino acid sequence, aa are covalently linked (peptide bonds!) and any
disulfide bridges are included in the primary structure.
The following protein structures are dependent upon nonconvalent interactions.
Secondary--regular reoccuring arrangement that occurs within adjacent amino acids
Alpha helix
Beta conformation
Tertiary-- spatial relationship between all peptides in a protein. Protein folding brings
sequentially distant aa close together.
--Fibrous, long strands or sheets, structural proteins with a single secondary type of
secondary structure.
--Globular, sperical; complex structures with many types of secondary structure.
Enzymes and olypeptide hormones are usually globular peptides.
Quaternary structure-- arrangement of polypeptide chains (subunits) within a protein.
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