CAP-Gly domain-containing linker protein 2

CAP-Gly domain-containing linker protein 2 (CLIP2) is a neuronal cytoskeletal adaptor protein that links microtubules to dendritic lamellar bodies, membranous organelles found in dendritic spines and bulbous dendritic appendages. CLIP2 is hypothesized to regulate brain-specific organellar trafficking and positioning in neurons (UniProt: Q9UDT6).

CLIP2 is primarily expressed in neural tissue and localized to dendritic compartments where it interfaces with the microtubule cytoskeleton. The UniProt record reports no explicit disease associations in its curated database. However, protein dysfunction affecting dendritic structure and organellar dynamics could contribute to synaptic pathology.

CLIP2 is downregulated in Alzheimer's disease brain tissue. Chaparral AD proteomics analysis of post-mortem human AD brain versus age-matched controls identified CLIP2 with a mean log2 fold-change of −0.49 across one subcellular fraction, consistent with decreased protein abundance in the disease state. This reduction may reflect dendritic degeneration or compromised synaptic integrity characteristic of AD pathology.