Health promotion in clubhouse programs: needs, barriers, and current and planned activities.

A survey was designed to obtain information concerning ways clubhouses affiliated with the International Center for Clubhouse Development (ICCD) promote practices that improve the physical health of members. This study examined perceptions of the need for health promotion interventions, current and planned health promotion practices, and barriers to change and program development. The mean number of health promotion activities ICCD clubhouses (N = 219) report providing was 5.24, SD = 2.42, range = 1 to 10. Despite barriers (e.g., cost), results indicate that every clubhouse responding to this survey offers at least one health promotion activity.

A study of a structured exercise program with members of an ICCD Certified Clubhouse: program design, benefits, and implications for feasibility.

Individuals with serious mental illness (SMI) have significantly greater risk of comorbid health problems and premature death, and there is need for interventions that can improve physical fitness and overall health. Accordingly, a study was conducted which evaluated the effectiveness of a structured physical exercise program that was developed as part of a wellness project in an ICCD Certified Clubhouse. Seventeen clubhouse members completed a 16-week program with evidence of significant improvement in aerobic capacity and perceived mental health as well as positive trends in perceived improvements in physical and social functioning. Qualitative data indicated satisfaction with the program by all participants, especially the value of group support, while also highlighting the need for greater attention to nutrition as part of a future program. Moreover, the study found that a structured exercise program can be successfully provided to members of an ICCD Certified Clubhouse.

Recognition of DNA substrates by T4 bacteriophage polynucleotide kinase.

T4 phage polynucleotide kinase (PNK) displays 5'-hydroxyl kinase, 3'-phosphatase and 2',3'-cyclic phosphodiesterase activities. The enzyme phosphorylates the 5' hydroxyl termini of a wide variety of nucleic acid substrates, a behavior studied here through the determination of a series of crystal structures with single-stranded (ss)DNA oligonucleotide substrates of various lengths and sequences. In these structures, the 5' ribose hydroxyl is buried in the kinase active site in proper alignment for phosphoryl transfer. Depending on the ssDNA length, the first two or three nucleotide bases are well ordered. Numerous contacts are made both to the phosphoribosyl backbone and to the ordered bases. The position, side chain contacts and internucleotide stacking interactions of the ordered bases are strikingly different for a 5'-GT DNA end than for a 5'-TG end. The base preferences displayed at those positions by PNK are attributable to differences in the enzyme binding interactions and in the DNA conformation for each unique substrate molecule.

Structure of a tRNA repair enzyme and molecular biology workhorse: T4 polynucleotide kinase.

T4 phage polynucleotide kinase (PNK) was identified over 35 years ago and has become a staple reagent for molecular biologists. The enzyme displays 5'-hydroxyl kinase, 3'-phosphatase, and 2',3'-cyclic phosphodiesterase activities against a wide range of substrates. These activities modify the ends of nicked tRNA generated by a bacterial response to infection and facilitate repair by T4 RNA ligase. DNA repair enzymes that share conserved motifs with PNK have been identified in eukaryotes. PNK contains two functionally distinct structural domains and forms a homotetramer. The C-terminal phosphatase domain is homologous to the L-2-haloacid dehalogenase family and the N-terminal kinase domain is homologous to adenylate kinase. The active sites have been characterized through structural homology analyses and visualization of bound substrate.