RESUMO

Class-I restricted T cell-associated molecule (CRTAM) is a member of the immunoglobulin superfamily, and it is closely related to nectin-like protein. CRTAM is expressed in activated CD8 T cells, NKT cells, NK cells and in a subpopulation CD4 T cells. In this study, we produce as recombinant proteins, the Ig-domains of CRTAM (IgV-IgC), the IgV, and the IgC. These proteins were successfully purified in the soluble fraction only if the stalk region was included. The recombinant CRTAM recognizes its ligand nectin-like 2 in a cell-free system. We also demonstrate that the IgC domain of CRTAM is recognized by the anti-hCRTAM monoclonal antibody C8 with a 0.62 nM affinity. In conclusion, the stalk region of CRTAM provides solubility for the expression of its Ig-domains as recombinant proteins.

Assuntos

Molécula 1 de Adesão Celular/genética , Sistema Livre de Células/química , Domínios de Imunoglobulina/genética , Imunoglobulinas/genética , Animais , Anticorpos Monoclonais/biossíntese , Anticorpos Monoclonais/química , Sítios de Ligação , Molécula 1 de Adesão Celular/imunologia , Molécula 1 de Adesão Celular/metabolismo , Clonagem Molecular , Escherichia coli/genética , Escherichia coli/metabolismo , Feminino , Expressão Gênica , Vetores Genéticos/química , Vetores Genéticos/metabolismo , Humanos , Hibridomas/química , Imunoglobulinas/imunologia , Imunoglobulinas/metabolismo , Células Jurkat , Camundongos , Camundongos Endogâmicos BALB C , Ligação Proteica , Proteínas Recombinantes/genética , Proteínas Recombinantes/imunologia , Proteínas Recombinantes/metabolismo