aptamer


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aptamer

A short biomolecule (e.g., an oligonucleotide or peptide) that binds to a specific target molecule—e.g., dopamine, HIV TAR, hemin, IFN-gamma, lysozyme, thrombin and vascular endothelial growth factor (VEGF). Decoy aptamers inactivate DNA-binding proteins (e.g., transcription factors), thereby activating or inactivating genes.

aptamer

(ap′tă-mĕr) [L. aptus, fitted, appropriate + -mere]
A chemical, usually a protein or a nucleic acid, that can fashion itself into numerous shapes, e.g., the configuration of a cell surface receptor.
References in periodicals archive ?
(61) Moreover, blocking of CFIm25 by a specific RNA aptamer produced alteration in the recruitment, cleavage and polyadenylation reactions.
Aptamer nano-flares for molecular detection in living cells.
Keywords: Cell-SELEX, DNA aptamer. Exonucleases, Prostate specific membrane antigen
Recently, the same conjugated STX-KLH was used to select aptamers in vitro, through the immobilization of the STX-KLH conjugate with an anti-KLH antibody which was previously conjugated with MB (Handy et al., 2013).
Incorporation of additional chemical groups with certain properties allows to considerably expand variation of a library, which increases the chances to select a specific aptamer even for complex non-protein compounds, such as glycans.
Eccrine's successful development of aptamer biosensors will have great value to the healthcare industry and eventually other markets.
According to the company, aptamers are small, single-stranded DNA or RNA molecules that are identified and manufactured in vitro, which fold into shapes that fit their targets.
Aptamer Group is a UK-based biotechnology company developing aptamers, nucleic acid molecules with affinity and selectivity for a specified target, as an alternative to antibodies.
To evaluate the impact of peptide on the binding affinity of the aptamer, we also incubated the beads with the same concentrations of fluorescein isothiocyanate-labeled free aptamer and the aptamer--peptide probe, respectively (see the Methods section in the online Data Supplement).
Field-effect-transistor- (FET-) like structures incorporating graphene substrates and DNA aptamer molecular sensing elements have been used to detect small molecules and ions of physiological interest [10].
A new therapeutic approach against liver metastasis was developed through the identification of an antimetastatic, CEA-specific RNA aptamer [70].