The Prototypical Oligopeptide Transporter YdgR From E. coli Exhibits a Strict Preference for β-Ala-Lys(AMCA).

Fluorescent probes are widely used in cellular imaging and disease diagnosis. Acting as substitute carriers, fluorescent probes can also be used to help transport drugs within cells. In this study, commonly used fluorophores, TAMRA (5-carboxytetramethylrhodamine), PBA (1-pyrenebutyric acid), NBD (nitrobenzoxadiazole), OG (Oregon Green), and CF (5-carboxyfluorescein) were conjugated with the dipeptide β-Ala-Lys, the peptide moiety of the well-established peptide transporter substrate β-Ala-Lys(AMCA) (AMCA: 7-amino-4-methyl-coumarin-3-acetic acid) by modifying it with respect to side-chain length and functional end groups.

Cryo-EM analysis of complement C3 reveals a reversible major opening of the macroglobulin ring.

The C3 protein is the central molecule within the complement system and undergoes proteolytic activation to C3b in the presence of pathogens. Pattern-independent activation of C3 also occurs via hydrolysis, resulting in C3(HO), but the structural details of C3 hydrolysis remain elusive. Here we show that the conformation of the C3(HO) analog, C3MA, is indistinguishable from C3b.

Pellino 3 E3 ligase promotes starvation-induced autophagy to prevent hepatic steatosis.

Nutrient deprivation is a major trigger of autophagy, a conserved quality control and recycling process essential for cellular and tissue homeostasis. In a high-content image-based screen of the human ubiquitome, we here identify the E3 ligase Pellino 3 (PELI3) as a crucial regulator of starvation-induced autophagy. Mechanistically, PELI3 localizes to autophagic membranes, where it interacts with the ATG8 proteins through an LC3-interacting region (LIR).

Adult Attachment Style, Emotion Regulation and Obsessive-Compulsive Disorder-A Preliminary Cross-Sectional Mediational Investigation of an Attachment-Based Model.

There is evidence that emotion regulation plays a role in the aetiology and maintenance of OCD, but knowledge about what impacts emotion dysregulation is limited. Attachment style is related to both emotion regulation and OCD symptoms, but the link between them has not been thoroughly studied. Examining emotion dysregulation within the context of OCD through an attachment theory framework may lead to a better understanding of the aetiology and maintenance of OCD.