Issues
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Cover image
Cover Image
Cover: Macropinocytosis is an evolutionarily conserved nutrient-scavenging pathway. In Dictyostelium discoideum cells, the proton-coupled oligopeptide transporter Slc15A sustains the macropinocytic activity of cells by maintaining intracellular availability of key amino acids. The time-lapse images show the dynamic distribution of Slc15A–GFP (green) and the PI(3,4)P2 sensor TAPP1–RFP (magenta) during macropinocytosis. See recent article by Y. Zhang, H. Tu et al. (jcs259450).
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RESEARCH HIGHLIGHTS
JCS PRIZE
CELL SCIENTISTS TO WATCH
ESSAYS
REVIEWS
Chaperone-mediated assembly of the proteasome core particle – recent developments and structural insights
Summary: Proteasomes are large multisubunit complexes responsible for destroying proteins. This Review discusses how new proteasomes are assembled.
Looking beyond the gene network – metabolic and mechanical cell drivers of leaf morphogenesis
Summary: A multiscale review on leaf morphogenesis, focusing on coordinated, non-cell-autonomous growth regulations via metabolism and biomechanics.
RESEARCH ARTICLES
Emerin regulation of nuclear stiffness is required for fast amoeboid migration in confined environments
Summary: In mechanically constrictive microenvironments, amoeboid migrating melanoma cells require emerin for the precise calibration of nuclear stiffness.
The yeast LYST homolog Bph1 is a Rab5 effector and prevents Atg8 lipidation at endosomes
Highlighted Article: The yeast LYST homolog Bph1 is an endosomal Rab5 effector that maintains endosomal function. Loss of Bph1 causes defects in endoytosis and Atg8 lipidation at endosomes, suggesting a function in endosomal biogenesis.
Reciprocal regulation of p21 and Chk1 controls the cyclin D1-RB pathway to mediate senescence onset after G2 arrest
Summary: Senescence onset after G2 arrest requires Chk1 downregulation and inhibition of CycD1–CDK RB kinases by p21 and is compromised in cancer cells due to delayed p21 induction and sustained Chk1 activity.
A network of transcription factors governs the dynamics of NODAL/Activin transcriptional responses
Summary: ATAC-seq and footprinting analysis reveals the transcription factor networks underlying NODAL/Activin signalling responses and a self-enabling regulatory mechanism that explains the expression of delayed NODAL/Activin target genes.
PLK1 controls centriole distal appendage formation and centrobin removal via independent pathways
Highlighted Article: During centriole maturation, the concomitant mitotic removal of centrobin and the recruitment of distal appendage proteins in human cells are both independent, yet both depend on the kinase PLK1.
Naphthoquinone-induced arylation inhibits Sirtuin 7 activity
Summary: The catalytic activity of the deacetylase Sirtuin 7 is inhibited in vitro and in vivo by the naphthoquinones menadione and plumbagin in a manner dependent on sulfhydryl arylation reactions.
Expression analysis and function of mitochondrial genome-encoded microRNAs
Summary: Mitochondria genome-encoded miRNAs (mitomiRs) physically interact with the RISC protein Ago2 inside mitochondria and cytoplasm to regulate mitochondrial DNA copy number in breast cancer.
Centrosome maturation requires phosphorylation-mediated sequential domain interactions of SPD-5
Summary: Mitotic PCM scaffold assembly in C. elegans embryos requires sequential domain interactions of SPD-5 mediated by PLK-1 phosphorylation.
MAPK activation drives male and female mouse teratocarcinomas from late primordial germ cells
Summary: The Braf V600E mutation transforms mouse late PGCs of both sexes in teratocarcinomas expressing stemness markers Sox2, Oct4 and Prdm14. Braf V600E ovaries show high numbers of growing and multi-ovular follicles and contain metaphase I oocytes.
TOOLS AND RESOURCES
A point mutation in human coilin prevents Cajal body formation
Summary: We identified a point mutation in human coilin clone deposited in Addgene that prevents Cajal body formation in mouse and human coilin-knockout cells and negatively affects the integrity of Cajal bodies in wild-type cells.
FIRST PERSON
PREPRINT HIGHLIGHTS
JCS Journal Meeting 2023: Imaging Cell Dynamics

Our 2023 Journal Meeting on ‘Imaging Cell Dynamics’ will be held from 14-17 May 2023 in Lisbon, Portugal. We have a limited number of spaces left so sign up now! Registration deadline: 31 March.
Call for papers: Cell and Tissue Polarity
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We are welcoming submissions for our next special issue, which will focus on ‘Cell and tissue polarity’ and will be guest edited by David Bryant. Submission deadline: 15 July.
Webinar: Increasing the visibility and impact of your research
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Would you like to increase the visibility and impact of your research and raise your profile internationally? If so, register for the very practical webinar we are running in association with HUBS on 23 February 2023.
Cell scientist to watch: Gautam Dey

We interviewed Gautam Dey, who became a group leader at EMBL in Heidelberg, Germany, in 2021. His lab investigates the fundamental organisational principles and evolutionary dynamics of the nuclear compartment across eukaryotes.
Mechanisms of eukaryotic transcription termination at a glance

Check out our latest Cell Science at a Glance article and accompanying poster for an overview of the current understanding about the mechanisms of transcription termination by the three eukaryotic RNAPs.