|http://ghr.nlm.nih.gov/ A service of the U.S. National Library of Medicine®|
The official name of this gene is “L1 cell adhesion molecule.”
L1CAM is the gene's official symbol. The L1CAM gene is also known by other names, listed below.
The L1CAM gene provides instructions for producing the L1 protein, which is found throughout the nervous system on the surface of nerve cells (neurons). The L1 protein spans the cell membrane, so that one end of the protein remains inside the cell and the other end projects from the outer surface of the cell. This positioning allows the L1 protein to help activate various chemical signals within the cell. The L1 protein plays a role in the development and organization of neurons, the formation of the protective sheath (myelin) that surrounds certain neurons, and the formation of junctions between nerve cells (synapses), where cell-to-cell communication occurs.
The L1CAM gene belongs to a family of genes called CD (CD molecules). It also belongs to a family of genes called fibronectin type III domain containing (fibronectin type III domain containing). It also belongs to a family of genes called immunoglobulin superfamily, I-set domain containing (immunoglobulin superfamily, I-set domain containing).
A gene family is a group of genes that share important characteristics. Classifying individual genes into families helps researchers describe how genes are related to each other. For more information, see What are gene families? (http://ghr.nlm.nih.gov/handbook/howgeneswork/genefamilies) in the Handbook.
There are about 200 mutations in the L1CAM gene that cause L1 syndrome. These mutations change the structure of the L1 protein or disrupt its production. Mutations that change one protein building block (amino acid) typically cause less severe signs and symptoms than mutations that disrupt the production of the L1 protein. All mutations, however, impair L1 protein function and interfere with the development and function of neurons, leading to the characteristic features of L1 syndrome.
Cytogenetic Location: Xq28
Molecular Location on the X chromosome: base pairs 153,126,968 to 153,151,627
The L1CAM gene is located on the long (q) arm of the X chromosome at position 28.
More precisely, the L1CAM gene is located from base pair 153,126,968 to base pair 153,151,627 on the X chromosome.
See How do geneticists indicate the location of a gene? (http://ghr.nlm.nih.gov/handbook/howgeneswork/genelocation) in the Handbook.
You and your healthcare professional may find the following resources about L1CAM helpful.
You may also be interested in these resources, which are designed for genetics professionals and researchers.
See How are genetic conditions and genes named? (http://ghr.nlm.nih.gov/handbook/mutationsanddisorders/naming) in the Handbook.
adhesion molecule ; amino acid ; antibody ; cell ; cell adhesion ; cell membrane ; gene ; ligand ; molecule ; monoclonal ; monoclonal antibody ; nervous system ; protein ; syndrome
You may find definitions for these and many other terms in the Genetics Home Reference Glossary (http://www.ghr.nlm.nih.gov/glossary).
The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? (http://ghr.nlm.nih.gov/handbook/consult/findingprofessional) in the Handbook.