Ontology highlight
ABSTRACT:
SUBMITTER: Smith BD
PROVIDER: S-EPMC3156360 | biostudies-literature | 2011 Sep
REPOSITORIES: biostudies-literature
Bioorganic & medicinal chemistry letters 20110424 17
Conjugation to folic acid is known to enhance the uptake of molecules by human cells that over-produce folate receptors. Variants of bovine pancreatic ribonuclease (RNase A) that have attenuated affinity for the endogenous ribonuclease inhibitor protein (RI) are toxic to mammalian cells. Here, the random acylation of amino groups in wild-type RNase A with folic acid is shown to decrease its catalytic activity dramatically, presumably because of the alteration to a key active-site residue, Lys41. ...[more]