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Inhibitory antibodies against endopeptidase activity of human adamalysin 19
1Department of Chemistry and Biochemistry and Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida 32306-4390, USA.
Abstract:
Human adamalysin 19 (hADAM19)/meltrin beta is a member of the ADAM (a disintegrin and metalloproteinase) family and an active metalloproteinase. It is a new metalloproteinase and disintegrin dendritic cell antigen marker. Adamalysin 19 gene was expressed in normal and transformed tissues and cells such as placenta, brain, heart, leukocytes, and colorectal adenocarcinoma SW480. To develop specific tools to investigate the functions of hADAM19, peptide antigens were rationally selected and specific polyclonal antibodies (pAbs) were developed to modulate hADAM19 activity. Anti-metalloproteinase and anti-disintegrin domain IgG molecules inhibited the alpha-2-macroglobulin cleavage by hADAM19; however, their pre-immune and anti-pro-domain IgG molecules did not. Since anti-disintegrin IgG also neutralized the proteolytic activity, the disintegrin domain may affect the hADAM19 protein folding and/or substrate binding. These pAbs may be used to specifically localize the hADAM19 protein in tissues and cells and elucidate its biological and pathological functions such as processing pro-growth factors.
Insights
Researchers developed specific antibodies to study human adamalysin 19 (hADAM19), a metalloproteinase involved in cell functions. These antibodies helped identify the disintegrin domain
Area of Science:
- Biochemistry
- Molecular Biology
- Immunology
Background:
- Human adamalysin 19 (hADAM19), also known as meltrin beta, is an active metalloproteinase within the ADAM family.
- hADAM19 functions as a metalloproteinase and disintegrin dendritic cell antigen marker, with its gene expressed in various normal and transformed tissues.
Purpose of the Study:
- To develop specific tools for investigating hADAM19 functions.
- To create polyclonal antibodies (pAbs) capable of modulating hADAM19 activity.
Main Methods:
- Rational selection of peptide antigens for antibody development.
- Generation of specific polyclonal antibodies targeting different domains of hADAM19.
- Assessing the inhibitory effects of antibodies on alpha-2-macroglobulin cleavage by hADAM19.
Main Results:
- Anti-metalloproteinase and anti-disintegrin domain IgG molecules effectively inhibited hADAM19-mediated alpha-2-macroglobulin cleavage.
- Pre-immune and anti-pro-domain IgG molecules did not show inhibitory effects.
- The disintegrin domain's role in hADAM19 protein folding and substrate binding was suggested by its neutralization of proteolytic activity.
Conclusions:
- Developed polyclonal antibodies can specifically localize hADAM19 in tissues and cells.
- These antibodies are valuable tools for elucidating the biological and pathological functions of hADAM19, including pro-growth factor processing.