Proteomics Final

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5 Terms

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Primary Structure

Amino acid sequence

Bacisally just processed by DNA sequence

Proteomics methods: Mass spectrometry, Edman degradation, etc.

Rigid Peptide bond

Limited rotational freedom, almost always in trans configuration

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Secondary Structure

Alpha helix and beta sheet.

Stabilized by hydrogen bonds between the backbone atoms

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Tertiary Structure

3D shape of a protein

Defined by primary structure

Combination of motifs and domains

Single polypeptide chain

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Quaternary Structure

Structure of two or more polypeptide chains

Homo- or hetero-oligomer

Large Complexes

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Secondary Structure Prediction: Parametric Approach

Value for alpha helix and beta sheet likelihood assigned to each amino acid. Predicts strethches of 5+ amino acids.