Palindrome Presence, Location, and Structural Context Are Predictive of RNA Self-Association

Palindromic regions in RNA are often sequestered in secondary structures, and their local structural context predicts self-association behavior in two interacting RNA chains.

• Why it matters: Palindromes are a clear sequence-encoded signal for RNA self-recognition, but it is unclear which palindromes are actually available for intermolecular binding versus trapped in fold-back structures.
• What they did: The authors classify palindromic regions into three classes using local secondary-structure context and nucleobase interaction availability, then test each class with coarse-grained molecular dynamics on minimal stem-loop RNA sequences.
• The result: Most palindromic regions in known RNA structures are bound within secondary structures, and the residue-level, structure-aware framework links sequence context to intermolecular self-association for two-chain systems.

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