ModelZ is a tool for assessing how well structural features are resolved in 3D density maps from Cryo-EM. Structural features include:

• Secondary Structure Elements (e.g. α-helices and β-sheets)
• Side Chains

A fitted model is used in the analysis. A Z-score is calculated for each feature in the model, to quantify how well the feature is resolved in the density map. Z-scores can be:

• used to visualize how well each feature is resolved, and/or
• averaged to represent the entire model/map.

For more details, please see the following publication:

• G. Pintilie and W. Chiu, “Assessment of Structural Features in Cryo-EM Density Maps using SSE and Side Chain Z-Scores,” J. Struct. Biol., Aug. 2018. Pubmed

ModelZ is available as a plugin to UCSF Chimera.

• Download
• Tutorial
• Registration
• Feedback

Email gregp@slac.stanford.edu with questions, suggestions etc.