A new family of sterol-specific lipid transfer proteins has been found that anchors in the endoplasmic reticulum; some of these proteins stretch across membrane contacts and mediate sterol traffic from the plasma membrane.
The small subunit ribosomal protein uS7/Rps5 interacts with translation initiation factor eIF2α to stabilize first the open, and then the closed conformation of the pre-initiation complex to promote accurate start codon selection in vivo.
Jyothsna Visweswaraiah, Yvette Pittman ... Alan G Hinnebusch
A structural element of mRNA exit channel protein Rps5 performs a critical role in start codon recognition during translation initiation by stabilizing initiator tRNA binding to the pre-initiation complex.
The transcription machinery is required for the disassembly of the promoter-proximal H2A.Z nucleosome, contributing to the constitutive histone turnover at yeast promoters.
Ariel Ogran, Tal Havkin-Solomon ... Rivka Dikstein
Examination of the changes in the transcription start site selection in TCL1-driven chronic lymphocytic leukemia and their impact on mRNA translation revealed a marked elevation of intra-genic cryptic promoters, which are predicted to generate multiple N-terminally truncated or modified proteins.
Jose Luis Llácer, Tanweer Hussain ... V Ramakrishnan
The N-terminal domain (NTD) of the initiation factor eIF5 bound to the 40S subunit at the precise location vacated by eIF1 promotes tRNAi accommodation at AUG codons.
GRAMD1 proteins sense a transient expansion of the accessible pool of plasma membrane cholesterol and facilitate its transport to the endoplasmic reticulum at ER-PM contact sites.
Christophe Malabat, Frank Feuerbach ... Alain Jacquier
RNA polymerase II generates numerous transcript isoforms, including transcripts initiating downstream of the START codon, that are efficiently degraded by the nonsense-mediated mRNA decay pathway.
In humans, specific sequence features can predict whether meiotic recombination occurs at sites bound by the protein PRDM9, whose DNA-binding zinc-finger domain can unexpectedly bind to gene promoters and to other copies of PRDM9.
Libing Yu, Jared T Winkelman ... Richard H Ebright
Variability in bacterial transcription start site selection involves DNA “scrunching” and “anti-scrunching,” which may represent a general mechanism for start site selection in all organisms.