Protein Structure Flashcards
What are amino acids linked together by?
Peptide Bonds
Primary
the linear sequence of amino acids in a protein
Secondary
the local 3-dimensional structure of the peptide backbone
Tertiary
the global arrangement of secondary structure, amino acid R groups and prosthetic groups
Quaternary
the arrangement of multiple protein molecules in complexes
N-Terminal
Amino Terminal
C-Terminal
Carboxyl Terminal
What form the peptide “backbone” of proteins?
Atoms of the peptide bonds and alpha-carbnos
Primary structure ______ all other levels of structure
dictates
What are the 4 major classes of secondary structure?
Alpha Helix, Beta sheet, turns, and random coil
Alpha Helix
a helical region of the peptide backbone that is stabilized by hydrogen bonding within the helix
Where are R groups in alpha helices?
Sticking outward
Beta Sheet
a planar arrangement of several peptide backbones that is stabilized by hydrogen bonding to adjacent beta strands
Where are R groups in beta sheets?
Sticking up and down from the beta sheets
In beta sheets, adjacent chains can be _____ or ______.
parallel; antiparallel
