Neuroserpin (SERPINI1) Human Recombinant Protein

This gene encodes a member of the serpin superfamily of serine proteinase inhibitors. The protein is primarily secreted by axons in the brain, and preferentially reacts with and inhibits tissue-type plasminogen activator. It is thought to play a role in the regulation of axonal growth and the development of synaptic plasticity. Mutations in this gene result in familial encephalopathy with neuroserpin inclusion bodies (FENIB), which is a dominantly inherited form of familial encephalopathy and epilepsy characterized by the accumulation of mutant neuroserpin polymers. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Jul 2008]

SERPINI1: Serine protease inhibitor that inhibits plasminogen activators and plasmin but not thrombin. May be involved in the formation or reorganization of synaptic connections as well as for synaptic plasticity in the adult nervous system. May protect neurons from cell damage by tissue-type plasminogen activator. Defects in SERPINI1 are the cause of familial encephalopathy with neuroserpin inclusion bodies (FEN1B). FEN1B is characterized clinically as an autosomal dominantly inherited dementia, histologically by unique neuronal inclusion bodies and biochemically by polymers of neuroserpin. Belongs to the serpin family.

Protein type: Secreted; Secreted, signal peptide

Chromosomal Location of Human Ortholog: 3q26.1

Cellular Component: extracellular space

Molecular Function: serine-type endopeptidase inhibitor activity

Biological Process: central nervous system development; peripheral nervous system development; regulation of cell adhesion

Disease: Encephalopathy, Familial, With Neuroserpin Inclusion Bodies