Global Analysis of Post-Translational Side-Chain Arginylation Using Pan-Arginylation Antibodies

Arginylation is a post-translational modification mediated by the arginyltransferase 1 (ATE1), which transfers the amino acid arginine to a protein or peptide substrate from a tRNA molecule. Initially, arginylation was thought to occur only on N-terminally exposed acidic residues, and its function was thought to be limited to targeting proteins for degradation. However, more recent data have shown that ATE1 can arginylate side chains of internal acidic residues in a protein without necessarily affecting metabolic stability. This greatly expands the potential targets and functions of arginylation, but tools for studying this process have remained limited. Here, we report the first global screen specifically for side-chain arginylation. We generate and validate "pan-arginylation" antibodies, which are designed to detect side-chain arginylation in any amino acid sequence context. We use these antibodies for immunoaffinity enrichment of side-chain arginylated proteins from wildtype and Ate1 knockout cell lysates. In this way, we identify a limited set of proteins that likely undergo ATE1-dependent side-chain arginylation and that are enriched in specific cellular roles, including translation, splicing, and the cytoskeleton.

No borders on a fragile planet: Introducing four lay models of social psychological precarity to support global human identification and citizenship

Measures such as Identification with all humanity (IWAH) and global identification and citizenship (GHIC) are positivity correlated with measures of humanitarianism, cosmopolitanism and environmental concern. Research using these measures suggests that most citizens have low-global identification scores. This article sheds light on this finding by investigating how global identification relates to precarity and migration (neither of which are measured in the IWAH/GHIC). The study conducted in England, Scotland and Sweden introduces a qualitative dialogical approach to GHIC. This involves measuring migration-mobility in dialogical interviews and controlling and removing borders on world maps-using an interactive world mapping task (N = 23). Participants articulate four social representations relating to a fragile earth, enduring colonial settler/native conflict, ingroup/outgroup conflict or, in contrast, a cooperative plentiful planet where borders are unnecessary. Such social representations demonstrate the importance of planetary consciousness and relate to four lay models of social psychological precarity related to intergroup competition, global conflict, economic rationality and human-made borders. In conclusion, all participants employ lay models of social psychological precarity when discussing sovereignty, migration and belonging. We recommend psychologists investigating GHIC include measures of social psychological precarity and migration-mobility.

Global identification predicts gay-male identity integration and well-being among Turkish gay men

In most parts of the world, hegemonic masculinity requires men to endorse traditional masculine ideals, one of which is rejection of homosexuality. Wherever hegemonic masculinity favours heterosexuality over homosexuality, gay males may feel under pressure to negotiate their conflicting male gender and gay sexual identities to maintain positive self-perceptions. However, globalization, as a source of intercultural interaction, might provide a beneficial context for people wishing to create alternative masculinities in the face of hegemonic masculinity. Hence, we tested if global identification would predict higher levels of gay-male identity integration, and indirectly subjective well-being, via alternative masculinity representations for gay and male identities. A community sample of 219 gay and bisexual men from Turkey completed the study. Structural equation modelling revealed that global identification positively predicted gay-male identity integration, and indirectly subjective well-being; however, alternative masculinity representations did not mediate this relationship. Our findings illustrate how identity categories in different domains can intersect and affect each other in complex ways. Moreover, we discuss mental health and well-being implications for gay men living in cultures where they experience high levels of prejudice and stigma.

Feeling global, acting ethically: global identification and fairtrade consumption

Global identification has become a popular construct in recent psychological debate as it relates to harmonious intergroup relations and a caring for all humanity. Based on social identity theorizing, the current research tests whether global identification can also predict consumer choices, at the expense of lower personal benefit. Importantly, we assumed that concerns about global injustice represent a crucial component of that relation. We predicted that participants who identified strongly with all humanity would rather choose a Fairtrade product alternative over a conventional one, compared with low identifiers. In addition, we assumed that this effect be mediated by perceived global injustice. Both predictions were confirmed in a consumer choice study (N = 68). Overall, global identification and globally relevant consumer behavior seem meaningfully interconnected, and we discuss these findings with regard to recent theoretical developments in Fairtrade consumption research.