Bacterial adaptation to cold: Conservation of a short J-domain co-chaperone and its protein partners in environmental proteobacteria.

Bacterial genomes are a huge reservoir of genes encoding J-domain protein co-chaperones that recruit the molecular chaperone DnaK to assist protein substrates involved in survival, adaptation, or fitness. The atc operon of the aquatic mesophilic bacterium Shewanella oneidensis encodes the proteins AtcJ, AtcA, AtcB, and AtcC, and all of them, except AtcA, are required for growth at low temperatures. AtcJ is a short J-domain protein that interacts with DnaK, but also with AtcC through its 21 amino acid C-terminal domain. This interaction network is critical for cold growth. Here, we show that AtcJ represents a subfamily of short J-domain proteins that (i) are found in several environmental, mostly aquatic, ß- or É£-proteobacteria and (ii) contain a conserved PX7 W motif in their C-terminal extension. Using a combination of NMR, biochemical and genetic approaches, we show that the hydrophobic nature of the tryptophan of the S. oneidensis AtcJ PX7 W motif determines the strong AtcJ-AtcC interaction essential for cold growth. The AtcJ homologues are encoded by operons containing at least the S. oneidensis atcA, atcB, and atcC homologues. These findings suggest a conserved network of DnaK and Atc proteins necessary for low-temperature growth and, given the variation in the atc operons, possibly for other biological functions.

"In Africa, There Was No Family Planning. Every Year You Just Give Birth": Family Planning Knowledge, Attitudes, and Practices Among Somali and Congolese Refugee Women After Resettlement to the United States.

It is crucial for refugee service providers to understand the family planning knowledge, attitudes, and practices of refugee women following third country resettlement. Using an ethnographic approach rooted in Reproductive Justice, we conducted six focus groups that included 66 resettled Somali and Congolese women in a western United States (US) metropolitan area. We analyzed data using modified grounded theory. Three themes emerged within the family planning domain: (a) concepts of family, (b) fertility management, and (c) unintended pregnancy. We contextualized these themes within existing frameworks for refugee cultural transition under the analytic paradigms of "pronatalism and stable versus evolving family structure" and "active versus passive engagement with family planning." Provision of just and equitable family planning care to resettled refugee women requires understanding cultural relativism, social determinants of health, and how lived experiences influence family planning conceptualization. We suggest a counseling approach and provider practice recommendations based on our study findings.