MBL2 / Mannan-Binding Lectin Immunizing Blocking Peptide

This gene encodes the soluble mannose-binding lectin or mannose-binding protein found in serum. The protein encoded belongs to the collectin family and is an important element in the innate immune system. The protein recognizes mannose and N-acetylglucosamine on many microorganisms, and is capable of activating the classical complement pathway. Deficiencies of this gene have been associated with susceptibility to autoimmune and infectious diseases. [provided by RefSeq, Jul 2008]

MBL2: Calcium-dependent lectin involved in innate immune defense. Binds mannose, fucose and N-acetylglucosamine on different microorganisms and activates the lectin complement pathway. Binds to late apoptotic cells, as well as to apoptotic blebs and to necrotic cells, but not to early apoptotic cells, facilitating their uptake by macrophages. May bind DNA.

Protein type: Secreted; Secreted, signal peptide

Chromosomal Location of Human Ortholog: 10q11.2

Cellular Component: cell surface; collagen; extracellular region; extracellular space

Molecular Function: calcium ion binding; calcium-dependent protein binding; mannose binding; protein binding; receptor binding; serine-type endopeptidase activity

Biological Process: acute-phase response; complement activation; complement activation, classical pathway; complement activation, lectin pathway; defense response to bacterium; defense response to Gram-positive bacterium; innate immune response; killing by host of symbiont cells; negative regulation of viral reproduction; opsonization; positive regulation of phagocytosis; proteolysis; response to oxidative stress

Disease: Mannose-binding Protein Deficiency