An AlphaFold confidence score for local structural accuracy, usually reported on a 0–100 scale. It is not a probability that a complete structure is correct.
Expected positional error at one residue after predicted and true structures are aligned on another residue. Low within-domain values with high between-domain values support more confident internal geometry than relative domain placement. PAE is not a physical residue–residue distance and need not be symmetric.[ref]
PAE: A measure of global confidence in AlphaFold2 predictions by EMBL-EBI. Formal definition and interpretation of inter-domain confidence
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Protein structure prediction is the process of determining the three-dimensional shape of a protein based on its amino acid sequence. Since proteins are essential biological molecules involved in countless cellular functions, understanding their structure is crucial for various applications in biochemistry, molecular biology, and medicine. Protein structure can be described at different levels: 1. **Primary Structure**: The linear sequence of amino acids in a polypeptide chain.