40S ribosomal subunits scan mRNA for the start codon by one-dimensional diffusion.

During eukaryotic translation initiation, the small (40S) ribosomal subunit is recruited to the 5' cap and subsequently scans the 5' untranslated region (5' UTR) of mRNA in search of the start codon. The molecular mechanism of mRNA scanning remains unclear. Here, using GFP reporters in cells, we show that order-of-magnitude variations in the lengths of unstructured 5' UTRs have a modest effect on protein synthesis.

Bariatric surgery prior to pancreas transplantation: a retrospective matched case-control study.

Background: The clinical impact of bariatric surgery (BS) prior to pancreas transplantation (PTx) is unclear.

Setting: University of Minnesota Hospital, Minneapolis, MN.

Methods: This was a single center retrospective case-controlled study of all patients January 1, 1998 and May 1, 2024 with a history of BS prior to PTx.

Sampling-based Continuous Optimization with Coupled Variables for RNA Design.

The task of RNA design given a target structure aims to find a sequence that can fold into that structure. It is a computationally hard problem where some version(s) have been proven to be NP-hard. As a result, heuristic methods such as local search have been popular for this task, but by only exploring a fixed number of candidates.

Structural determinants of inverted Alu-mediated backsplicing revealed by -MaP and -JuMP.

Biogenesis of circular RNA usually involves a backsplicing reaction where the downstream donor site is ligated to the upstream acceptor site by the spliceosome. For this reaction to occur, it is hypothesized that these sites must be in proximity. Inverted repeat sequences, such as Alu elements, in the upstream and downstream introns are predicted to base-pair and represent one mechanism for inducing proximity.