The T cell receptor/CD3 complex is composed of at least two autonomous transduction modules

Recent studies have demonstrated that the CD3-ζ subunit of the T cell antigen receptor (TCR) complex is involved in signal transduction. However, the function of the remaining invariant subunits, CD3-γ, -δ, and , is still poorly understood. To examine their role in TCR function, we have constructed TCR/CD3 complexes devoid of functional ζ subunit and showed that they are still able to trigger the production of interleukin-2 in response to antigen or superantigen. These data, together with previous results, indicate that the TCR/CD3 complex is composed of at least two parallel transducing units, made of the γδ and ζ chains, respectively, Furthermore, the analysis of partially truncated ζ chains has led us to individualize a functional domain that may have constituted the building block of most of the transducing subunits associated with antigen receptors and some Fc receptors

Stage-Specific Inhibition of MHC Class I Presentation by the Epstein-Barr Virus BNLF2a Protein during Virus Lytic Cycle

gamma-herpesvirus Epstein-Barr virus (EBV) persists for life in infected individuals despite the presence of a strong immune response. During the lytic cycle of EBV many viral proteins are expressed, potentially allowing virally infected cells to be recognized and eliminated by CD8+ T cells. We have recently identified an immune evasion protein encoded by EBV, BNLF2a, which is expressed in early phase lytic replication and inhibits peptide- and ATP-binding functions of the transporter associated with antigen processing. Ectopic expression of BNLF2a causes decreased surface MHC class I expression and inhibits the presentation of indicator antigens to CD8+ T cells. Here we sought to examine the influence of BNLF2a when expressed naturally during EBV lytic replication. We generated a BNLF2a-deleted recombinant EBV (ΔBNLF2a) and compared the ability of ΔBNLF2a and wild-type EBV-transformed B cell lines to be recognized by CD8+ T cell clones specific for EBV-encoded immediate early, early and late lytic antigens. Epitopes derived from immediate early and early expressed proteins were better recognized when presented by ΔBNLF2a transformed cells compared to wild-type virus transformants. However, recognition of late antigens by CD8+ T cells remained equally poor when presented by both wild-type and ΔBNLF2a cell targets. Analysis of BNLF2a and target protein expression kinetics showed that although BNLF2a is expressed during early phase replication, it is expressed at a time when there is an upregulation of immediate early proteins and initiation of early protein synthesis. Interestingly, BNLF2a protein expression was found to be lost by late lytic cycle yet ΔBNLF2a-transformed cells in late stage replication downregulated surface MHC class I to a similar extent as wild-type EBV-transformed cells. These data show that BNLF2a-mediated expression is stage-specific, affecting presentation of immediate early and early proteins, and that other evasion mechanisms operate later in the lytic cycle

The Golden Age of European Cabaret

Program for the second annual RISD Cabaret held in the Cellar in the Pit. Design and layout by Anne Johnson, Susan Sellers and Georgie Stout.https://digitalcommons.risd.edu/liberalarts_cabaret_programs/1001/thumbnail.jp

Publisher Correction:Voices of biotech leaders (Nature Biotechnology, (2021), 39, 6, (654-660), 10.1038/s41587-021-00941-4)

In the version of this article initially published, an author name was given as Abasi Ene Abong. The correct name is Abasi Ene-Obong. Also, the affiliation for Sebastian Giwa was given as Elevian, Pagliuca Harvard Life Lab, Allston, MA, USA. The correct affiliations are Biostasis Research Institute, Berkeley, CA, USA; Sylvatica Biotech, North Charleston, SC, USA; and Humanity Bio, Kensington, CA, USA. An affiliation for Jeantine Lunshof was given as Department of Genetics, Harvard Medical School, Boston, MA, USA. The correct affiliation is Wyss Institute for Biological Engineering, Harvard University, Boston, MA, USA. The errors have been corrected in the PDF and HTML versions of the article

Voices of biotech leaders

Nature Biotechnology asks a selection of leaders from across biotech to look at the future of the sector and make some predictions for the coming years.</p

Voices of biotech leaders

Nature Biotechnology asks a selection of leaders from across biotech to look at the future of the sector and make some predictions for the coming years

A Forgotten Adivasi Landscape: Museums and Memory in western India

This article focuses on processes of remembering, forgetting and re-remembering. It examines a fundamental tension between the project of retrieving an adivasi past, initiated by an adivasi museum in rural western India, and the social and material landscape surrounding it, characterised instead by fragmentation and separation from the identity of adivasi. The article reflects on a collaborative research project between the researcher, young adivasi curators and inhabitants of the area adjoining the museum. It shows how, while curators engaged in a project of recuperation, at the same time, they were distancing themselves from their traditional identity by joining reform movements and new religious sects. Processes of memory and forgetting, however, also co-existed. People held multiple identities and the process of retrieving the past also called for transformation and reform. The article is a timely contribution to debates about adivasi identity, social transformation and religious reform. It also offers a reflection on the new role of indigenous museums and their potential to address a ‘crisis of postcolonial memory’ (Werbner 1998). Finally, it contributes to discussions of methodology with a focus on the collaborative process of collecting and its role in eliciting or preventing certain kinds of memories

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

A guide to the assessment of software development methods

The ideas and findings in this report should not be construed as an official DoD position. It is published in the interest of scientific and technical information exchange. FOR THE COMMANDER (signature on file