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Lunatic Fringe

Function

Glycosyltransferase that initiates the elongation of O-linked fucose residues attached to EGF-like repeats in the extracellular domain of Notch molecules. Modulates NOTCH1 activity by modifying O-fucose residues at specific EGF-like domains resulting in inhibition of NOTCH1 activation by JAG1 and enhancement of NOTCH1 activation by DLL1 via an increase in its binding to DLL1 (By similarity). Decreases the binding of JAG1 to NOTCH2 but not that of DLL1 (PubMed:11346656). Essential mediator of somite segmentation and patterning (By similarity).

Involvement in disease

Spondylocostal dysostosis 3, autosomal recessive

SCDO3

A condition of variable severity associated with vertebral and rib segmentation defects. The main skeletal malformations include fusion of vertebrae, hemivertebrae, fusion of certain ribs, and other rib malformations. Deformity of the chest and spine (severe scoliosis, kyphoscoliosis and lordosis) is a natural consequence of the malformation and leads to a dwarf-like appearance. As the thorax is small, infants frequently have respiratory insufficiency and repeated respiratory infections resulting in life-threatening complications in the first year of life.

None

The disease is caused by variants affecting the gene represented in this entry.

Post-translational modifications

A soluble form may be derived from the membrane form by proteolytic processing.

Sequence similarities

Belongs to the glycosyltransferase 31 family.

Cellular localization

  • Golgi apparatus
  • Golgi apparatus membrane
  • Single-pass type II membrane protein

Alternative names

O-fucosylpeptide 3-beta-N-acetylglucosaminyltransferase, LFNG

Target type

Proteins

Primary research area

Developmental Biology

Molecular weight

41773Da

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