NLGN2: Transmembrane scaffolding protein involved in cell-cell interactions via its interactions with neurexin family members. Mediates cell-cell interactions both in neurons and in other types of cells, such as Langerhans beta cells. Plays a role in synapse function and synaptic signal transmission, especially via gamma- aminobutyric acid receptors (GABA(A) receptors). Functions by recruiting and clustering synaptic proteins. Promotes clustering of postsynaptic GABRG2 and GPHN. Modulates signaling by inhibitory synapses, and thereby plays a role in controlling the ratio of signaling by excitatory and inhibitory synapses and information processing. Required for normal signal amplitude from inhibitory synapses, but is not essential for normal signal frequency. May promote the initial formation of synapses, but is not essential for this. In vitro, triggers the de novo formation of presynaptic structures. Mediates cell-cell interactions between Langerhans beta cells and modulates insulin secretion. Belongs to the type-B carboxylesterase/lipase family.
Protein type: Membrane protein, integral
Chromosomal Location of Human Ortholog: 17p13.1
Cellular Component: presynaptic membrane; postsynaptic membrane; extracellular space; cell surface; membrane; integral to plasma membrane; synapse; cell junction
Molecular Function: neurexin binding; receptor activity; cell adhesion molecule binding
Biological Process: regulation of synaptic transmission; positive regulation of synaptogenesis; cell-cell adhesion; synaptogenesis; metabolic process; synapse organization and biogenesis; positive regulation of synaptic transmission, GABAergic; neuron adhesion; neurological control of breathing; neuromuscular process controlling balance; sensory perception of pain; intercellular junction maintenance; positive regulation of synaptic transmission, glutamatergic
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