A Call to Assess the Impacts of Course-Based Undergraduate Research Experiences for Career and Technical Education, Allied Health, and Underrepresented Students at Community Colleges.

Course-based undergraduate research experiences (CUREs) have the potential to impact student success and reduce barriers for students to participate in undergraduate research. Literature review has revealed that, while CUREs are being implemented at both community colleges (CCs) and bachelor's degree-granting institutions, there are limited published studies on the differential impacts CUREs may have on CC students in allied health programs, career and technical education, and nursing pathways (termed "workforce" in this essay). This essay summarizes proposed outcomes of CURE instruction and explores possible reasons for limited reporting on outcomes for CC and workforce students. It also provides recommendations to guide action and effect change regarding CURE implementation and assessment at CCs. This essay is a call to action to expand the science, technology, engineering, and mathematics career development pathway to include workforce students, implement CUREs designed for workforce students, and assess the differential impacts CUREs may have on workforce student populations at CCs.

Critical Components of the Conjugation Machinery of the Integrative and Conjugative Element ICEBs1 of Bacillus subtilis.

UNLABELLED: Conjugation, or mating, plays a profound role in bacterial evolution by spreading genes that allow bacteria to adapt to and colonize new niches. ICEBs1, an integrative and conjugative element of Bacillus subtilis, can transfer itself and mobilize resident plasmids. DNA transfer is mediated by a type IV secretion system (T4SS). Characterized components of the ICEBs1 T4SS include the conserved VirB4-like ATPase ConE, the bifunctional cell wall hydrolase CwlT, and the presumed VirD4-like coupling protein ConQ. A fusion of ConE to green fluorescent protein (GFP) localizes to the membrane preferentially at the cell poles. One or more ICEBs1 proteins are required for ConE's localization at the membrane, as ConE lacks predicted transmembrane segments and ConE-GFP is found dispersed throughout the cytoplasm in cells lacking ICEBs1. Here, we analyzed five ICEBs1 genes to determine if they are required for DNA transfer and/or ConE-GFP localization. We found that conB, conC, conD, and conG, but not yddF, are required for both ICEBs1 transfer and plasmid mobilization. All four required genes encode predicted integral membrane proteins. conB and, to some extent, conD were required for localization of ConE-GFP to the membrane. Using an adenylate cyclase-based bacterial two-hybrid system, we found that ConE interacts with ConB. We propose a model in which the ICEBs1 conjugation machinery is composed of ConB, ConC, ConD, ConE, ConG, CwlT, ConQ, and possibly other ICEBs1 proteins, and that ConB interacts with ConE, helping to recruit and/or maintain ConE at the membrane. IMPORTANCE: Conjugation is a major form of horizontal gene transfer and has played a profound role in bacterial evolution by moving genes, including those involved in antibiotic resistance, metabolism, symbiosis, and infectious disease. During conjugation, DNA is transferred from cell to cell through the conjugation machinery, a type of secretion system. Relatively little is known about the conjugation machinery of Gram-positive bacteria. Here, we analyzed five genes of the integrative and conjugative element ICEBs1 of Bacillus subtilis. Our research identifies four new components of the ICEBs1 conjugation machinery (ConB, ConC, ConD, and ConG) and shows an interaction between ConB and ConE that is required for ConE to associate with the cell membrane.