Pigment Epithelium-Derived Factor (SERPINF1) Human Protein

The protein encoded by this gene is a member of the serpin family, although it does not display the serine protease inhibitory activity shown by many of the other serpin family members. The encoded protein is secreted and strongly inhibits angiogenesis. In addition, this protein is a neurotrophic factor involved in neuronal differentiation in retinoblastoma cells.[provided by RefSeq, Mar 2011]

PEDF: a secreted neurotrophic protein that induces extensive neuronal differentiation in retinoblastoma cells. Potent inhibitor of angiogenesis. As it does not undergo the S (stressed) to R (relaxed) conformational transition characteristic of active serpins, it exhibits no serine protease inhibitory activity. The N-terminal (AA 44-121) exhibits neurite outgrowth-inducing activity. The C-terminal exposed loop (AA 382-418) is essential for serpin activity. Extracellular phosphorylation enhances antiangiogenic activity.

Protein type: Secreted; Secreted, signal peptide; Inhibitor

Chromosomal Location of Human Ortholog: 17p13.3

Cellular Component: axon hillock; extracellular matrix; extracellular space; perinuclear region of cytoplasm; melanosome; extracellular region; basement membrane

Molecular Function: serine-type endopeptidase inhibitor activity

Biological Process: cell proliferation; negative regulation of angiogenesis; positive regulation of neurogenesis; ovulation cycle; short-term memory; retina development in camera-type eye; multicellular organismal development; negative regulation of inflammatory response; response to arsenic; response to acidity; kidney development; aging

Disease: Osteogenesis Imperfecta, Type Vi