The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Molecular cloning, expression, and chromosomal localization of the human earliest lymphocyte activation antigen AIM/CD69, a new member of the C-type animal lectin superfamily of signal-transmitting receptors.

The activation of T lymphocytes, both in vivo and in vitro, induces the expression of CD69. This molecule, which appears to be the earliest inducible cell surface glycoprotein acquired during lymphoid activation, is involved in lymphocyte proliferation and functions as a signal transmitting receptor in lymphocytes, natural killer (NK) cells, and platelets. To determine the structural basis for CD69 function, the cDNA coding for CD69 was isolated by a polymerase chain reaction-based strategy using oligonucleotides deduced from peptide sequences of the purified protein. The isolated cDNA exhibited a single open reading frame of 597 bp coding for CD69, and predicted a 199-amino acid protein of type II membrane topology, with extracellular (COOH-terminal), transmembrane, and intracellular domains. The CD69 clone hybridized to a 1.7-kb mRNA species, which was rapidly induced and degraded after lymphocyte stimulation, consistent with the presence of rapid degradation signals at the 3' untranslated region. Transient expression of the polypeptide encoded by CD69 cDNA in COS-7 cells demonstrated that it presented properties comparable to native CD69 protein. The CD69 gene was regionally mapped to chromosome 12 p13- p12 by both somatic cell hybrid DNA analysis and fluorescence in situ hybridization coupled with GTG banding (G bands by trypsin using Giemsa). Protein sequence homology search revealed that CD69 is a new member of the Ca(2+)-dependent (C-type) lectin superfamily of type II transmembrane receptors, which includes the human NKG2, the rat NKR-P1, and the mouse NKR-P1 families of NK cell-specific genes. CD69 also has a structural homology with other type II lectin cell surface receptors, such as the T cell antigen Ly49, the low avidity immunoglobulin E receptor ( CD23), and the hepatic asialoglycoprotein receptors. The CD69 protein also shares functional characteristics with most members of this superfamily, which act as transmembrane signaling receptors in early phases of cellular activation.[1]

References

  1. Molecular cloning, expression, and chromosomal localization of the human earliest lymphocyte activation antigen AIM/CD69, a new member of the C-type animal lectin superfamily of signal-transmitting receptors. López-Cabrera, M., Santis, A.G., Fernández-Ruiz, E., Blacher, R., Esch, F., Sánchez-Mateos, P., Sánchez-Madrid, F. J. Exp. Med. (1993) [Pubmed]
 
WikiGenes - Universities