A previously unrecognized group of metalloenzymes enables human gut microbes to metabolize dietary molecules and neurotransmitters and likely mediates interactions and metabolism among environmental microorganisms.
Sponges and ctenophores lack hypoxia-inducible factors, suggesting that the metazoan last common ancestor could have lived aerobically under severe hypoxia and did not need to regulate its transcription in response to oxygen availability.
Ultrastructural, biochemical, and behavioral assessments reveal that the Crtap-/- mouse model of severe, recessive Osteogenesis Imperfecta presents with defects in tendon structure and strength that correlate with severe motor deficits.
Step-wise processing of plant peptide hormone precursors by subtilisin-like proteinases in consecutive compartments of the secretory pathway is required for formation and secretion of the bioactive peptides.
Multi-omics reveals that Alkb homolog 7 (ALKBH7), α mitochondrial alpha-ketoglutarate dioxygenase of unclear function, regulates glyoxal metabolism, which may explain its role in necrosis and heart attack.
The common post-translational modification trans-4-hydroxy-L-proline is reversed by gut microbes with the help of hydroxyproline dehydratase (HypD), an enzyme that performs a radical chemical mechanism.