Biomaterial Database

Variations in duplex DNA conformation detected by the binding of monoclonal autoimmune antibodies. 1986

R P Braun, and J S Lee

Four monoclonal antibodies (Jel 229, 239, 241, 242) which bound to duplex DNA were prepared from two autoimmune female NZB/NZW mice. Their binding to various nucleic acids was investigated by a competitive solid phase radioimmune assay which allows the estimation of relative binding constants. None of the antibodies showed any consistent variation of binding constant with base composition and thus they must recognize features of the DNA backbone. Jel 241 binds across the major groove but the interaction with poly(pyrimidine) X poly(purine) DNAs was barely detectable. This antibody appears to recognize the "alternating-B" conformation which is promoted by methylation of pyrimidines in alternating sequences. The other three antibodies bind in the minor groove. In particular, for Jel 229 the preferred antigen was poly(dG) X poly(dC) with only weak binding to poly(dA) X poly(dT). This suggests a requirement for a wide minor groove. Thus autoimmune antibodies provide examples of "analogue" recognition and can be used to detect structural variations in the grooves of duplex DNA.

UI	MeSH Term	Description	Entries
D008814	Mice, Inbred NZB	An inbred strain of mouse that is widely used as a model for AUTOIMMUNE DISEASES such as SYSTEMIC LUPUS ERYTHEMATOSUS.	Mice, NZB,Mouse, Inbred NZB,Mouse, NZB,Inbred NZB Mice,Inbred NZB Mouse,NZB Mice,NZB Mice, Inbred,NZB Mouse,NZB Mouse, Inbred
D008970	Molecular Weight	The sum of the weight of all the atoms in a molecule.	Molecular Weights,Weight, Molecular,Weights, Molecular
D009690	Nucleic Acid Conformation	The spatial arrangement of the atoms of a nucleic acid or polynucleotide that results in its characteristic 3-dimensional shape.	DNA Conformation,RNA Conformation,Conformation, DNA,Conformation, Nucleic Acid,Conformation, RNA,Conformations, DNA,Conformations, Nucleic Acid,Conformations, RNA,DNA Conformations,Nucleic Acid Conformations,RNA Conformations
D009838	Oligodeoxyribonucleotides	A group of deoxyribonucleotides (up to 12) in which the phosphate residues of each deoxyribonucleotide act as bridges in forming diester linkages between the deoxyribose moieties.	Oligodeoxynucleotide,Oligodeoxyribonucleotide,Oligodeoxynucleotides
D004247	DNA	A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).	DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D004268	DNA-Binding Proteins	Proteins which bind to DNA. The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases.	DNA Helix Destabilizing Proteins,DNA-Binding Protein,Single-Stranded DNA Binding Proteins,DNA Binding Protein,DNA Single-Stranded Binding Protein,SS DNA BP,Single-Stranded DNA-Binding Protein,Binding Protein, DNA,DNA Binding Proteins,DNA Single Stranded Binding Protein,DNA-Binding Protein, Single-Stranded,Protein, DNA-Binding,Single Stranded DNA Binding Protein,Single Stranded DNA Binding Proteins
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000911	Antibodies, Monoclonal	Antibodies produced by a single clone of cells.	Monoclonal Antibodies,Monoclonal Antibody,Antibody, Monoclonal
D000915	Antibody Affinity	A measure of the binding strength between antibody and a simple hapten or antigen determinant. It depends on the closeness of stereochemical fit between antibody combining sites and antigen determinants, on the size of the area of contact between them, and on the distribution of charged and hydrophobic groups. It includes the concept of "avidity," which refers to the strength of the antigen-antibody bond after formation of reversible complexes.	Affinity, Antibody,Antibody Avidity,Avidity, Antibody,Affinities, Antibody,Antibody Affinities,Antibody Avidities,Avidities, Antibody
D000918	Antibody Specificity	The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site.	Antibody Specificities,Specificities, Antibody,Specificity, Antibody