RMSF Analysis: Identifying Flexible Residues in Molecular Dynamics

By BioDockify Computational Research Team · August 9, 2026 · MD Analysis

How to use RMSF (Root Mean Square Fluctuation) to identify flexible and rigid regions in protein MD simulations. Covers per-residue analysis, binding site flexibility, and interpretation guidelines.

Read the complete article with tables, code and references on BioDockify.

Key References

• Kuzmanic, A. & Zagrovic, B. Effects of increased sampling on protein molecular dynamics. J. Phys. Chem. B 114, 7745-7751 (2010).
• Kabsch, W. & Sander, C. Dictionary of protein secondary structure. Biopolymers 22, 2577-2637 (1983).
• Bakan, A. et al. Normal modes for predicting protein dynamics. Bioinformatics 27, 1575-1577 (2011).

Scope & Limitations

RMSF depends on simulation length — short runs underestimate flexibility Does not capture correlated motions (use DCCM) Terminal residues are always high (not informative)