Leucine Rich Repeat And Ig Domain Containing Protein 1 (LINGO1)

LINGO-1 contains an N-terminal leucine-rich repeat (LRR) domain, followed by 9 typical LRR domains, C-terminal LRR domain, an IgC2 domain, a transmembrane domain, and a cytoplasmic tail.

LINGO-1 is primarily expressed in neuronal tissue, and most abundantly in cortex. It has been implicated in the inhibition of axon regeneration through a ternary complex formed with NgR1 (ligand-binding subunit) and p75 (signal transducing subunit). The inhibitory action is achieved through RhoA-GTP upregulation in response to the presence of MOG, MAG or Nogo-66 in the central nervous system. LINGO-1 also inhibits oligodendrocyte precursor differentiation and myelination, by a mechanism that also involves activation of RhoA, but which apparently does not require 75 or NgR1.