In juvenile songbirds, neural sequences pre-exist tutor exposure, and the process of learning a new song may make use of existing neural sequences as a stable substrate for new behavioral changes.
Cryo-EM structures of the AAA+ ClpXP protease bound to an ssrA degron reveal the mechanism of substrate recognition and show how the machine transitions from recognition to translocation and unfolding.
Cryo-EM structures of the ClpXP protease reveal how protein substrates are bound, show how spiral ClpX hexamers bind symmetry-mismatched heptameric ClpP rings, and suggest mechanisms for processive substrate translocation.
Beyond its well-accepted function in metastasis, non-receptor tyrosine kinase FER also controls ovarian tumor cell proliferation through FER-IRS4-AKT signaling axis, making itself as a promising druggable target for the disease.
X-ray crystal structures capture ATP-dependent chalcogenide exchange from selenocyanate at the nitrogenase Fe protein cluster in the absence of the MoFe protein, an unexpected result as the Fe protein cluster is not traditionally perceived as a site of substrate binding.
Unlike humans and starlings which use memories of both absolute and relative information to decide between options in novel contexts, bumblebees rely only on the remembered ordinal ranking of options.
RNAseq profiles of female Aedes body parts, gut regions, and blood-fed guts provide insight into the anatomical patterning of immune and digestive function, and demonstrate the sequential induction of multiple peptidase cohorts over the course of blood meal digestion.
Midbrain dopaminergic neurons and a cortex-like structure called the arcopallium form part of a circuit that enables young songbirds to compare their own song with a template stored in memory, and use any discrepancies to improve their performance.
