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Recent advances in limb regeneration are revealing the molecular events that integrate growth control, cell fate programming, and positional information to yield the exquisite replacement of the amputated limb. Parallel progress in several invertebrate and vertebrate models has provided a broader context for understanding the mechanisms and the evolution of regeneration. Together, these discoveries...
The therapeutic potential of stem cells and nuclear cloning has led to renewed interest in classical models of regeneration. This longstanding problem is undergoing a renaissance spurred by the availability of new techniques that finally allow analysis on the cellular and molecular level.
Puf proteins are developmental regulators that control mRNA stability and translation by binding sequences in the 3' untranslated regions of their target mRNAs. We have determined the structure of the RNA binding domain of the human Puf protein, Pumilio1, bound to a high-affinity RNA ligand. The RNA binds the concave surface of the molecule, where each of the protein's eight repeats makes contacts...
The ~25 kDa carboxy-terminal domain of Drosophila Hedgehog protein (Hh-C) possesses an autoprocess-autoprocessing activity that results in an intramolecular cleavage of full-length Hedgehog protein and covalent attachment of a cholesterol moiety to the newly generated amino-terminal fragment. We have identified a 17 kDa fragment of Hh-C (Hh-C 17 ) active in the initiation of autoprocessing...
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