Posttranslational Modifications (PTMs) and Memory

This article discusses proposals that PTMs of cytoskeletal proteins (e.g. tubulins) play a role in memory.

Phosphorylation and Memory
The following sources propose that phosphorylation of microtubules plays a role in memory:

Hameroff, S.R., Craddock, T.J.A., and Tuszynski, J.A., "'Memory Bytes--Molecular Match for CaMKII Phosphorylation Encoding of Microtubule Lattices", Journal of Integrative Neuroscience, Vol. 9, No., 3, 2010, pp. 253-267.

Craddock, T.J.A., Tuszynski, J.A., and Hameroff, S., "Cytoskeletal Signaling:  Is Memory Encoded in Microtubule Lattices by CaMKII Phosphorylation?", PLoS Computational Biology, Vol. 8, Issue 3, March 2012, pp. 1-16.

General Proposals
The following source proposes that tubulin PTMs play a role in encoding long-term memory:

Janke, C., and Kneussel, M., "Tubulin post-translational modifications:  encoding functions on the neuronal microtubule cytoskeleton", Trends in Neuroscience, Vol. 33, 2010, pp. 362-372, at pp. 368-369.