A dedicated UNC45, Cro1, She4 (UCS) domain-containing protein assists in the Hsp90-mediated folding of the myosin head. Only weak sequence conservation exists between the single UCS protein of simple eukaryotes (She4 in budding yeast) and the two UCS proteins of higher organisms (the general cell and striated muscle UNC45s; UNC45-GC and UNC45-SM, respectively). In vertebrates, UNC45-GC facilitates cytoskeletal functions, whereas the 55% identical UNC45-SM assists assembly of the contractile apparatus of cardiac and skeletal muscles. A Saccharomyces cerevisiae she4Δ mutant, totally lacking any UCS protein, was engineered to express as its sole Hsp90 either the Hsp90α or the Hsp90β isoforms of human cytosolic Hsp90. A transient induction of the human UNC45-GC, but not UNC45-SM, could rescue the defective endocytosis in these she4Δ cells at 39 °C, irrespective of whether they possessed Hsp90α or Hsp90β. UNC45-GC-mediated rescue of the localisation of a Myo5-green fluorescent protein (GFP) fusion to cortical patches at 39 °C was more efficient in the yeast containing Hsp90α, though this may relate to more efficient functioning of Hsp90α as compared to Hsp90β in these strains. Furthermore, inducible expression of UNC45-GC, but not UNC45-SM, could partially rescue survival at a more extreme temperature (45 °C) that normally causes she4Δ mutant yeast cells to lyse. The results indicate that UCS protein function has been most conserved-yeast to man-in the UNC45-GC, not UNC45-SM. This may reflect UNC45-GC being the vertebrate UCS protein that assists formation of the actomyosin complexes needed for cytokinesis, cell morphological change, and organelle trafficking-events also facilitated by the myosins in yeast.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6045556 | PMC |
http://dx.doi.org/10.1007/s12192-017-0870-1 | DOI Listing |
Acta Crystallogr E Crystallogr Commun
October 2024
Department of PG Studies and Research in Physics Albert Einstein Block UCS Tumkur University, Tumkur Karnataka-572103 India.
In the title compound, CHNO, the torsion angle associated with the phenyl benzoate group is -173.7 (2)° and that for the benz-yloxy group is -174.8 (2)° establishing an -type conformation.
View Article and Find Full Text PDFHum Vaccin Immunother
December 2025
Medical Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.
In recent years, several clinical trials focused on the potential role of immune-checkpoint inhibitors (ICIs) in the adjuvant treatment of muscle-invasive urothelial cancer (UC). Heretofore, only the anti-programmed death protein 1 (anti-PD1) nivolumab received European Medical Agency (EMA) approval for cisplatin-unfit patients. In our work, we deeply analyzed the results of the three pivotal studies in view of the rapidly evolving therapeutic advanced UC's scenario.
View Article and Find Full Text PDFAnimals (Basel)
November 2024
Instituto de Biotecnologia/Programa de Pós-Graduação em Biotecnologia (PPGBIO), Universidade de Caxias do Sul (UCS), Caxias do Sul 95070-560, RS, Brazil.
Southern Brazil is home to a large biodiversity of elasmobranchs from the Brazilian coast. Several genera and species of small sharks of the Triakidae family live in this marine environment. Studies on these shark species are scarce, with few genetic data and little information on animal population structures.
View Article and Find Full Text PDFMod Pathol
November 2024
Department of Pathology, Stanford University School of Medicine, Stanford, California. Electronic address:
Uterine carcinosarcomas (UCS) are high-grade biphasic neoplasms with generally poor outcomes. Based on The Cancer Genome Atlas molecular classification of endometrial carcinomas, the majority of UCS are classified as copy-number high/serous-like (p53-abnormal); however, a small subset represent other molecular subtypes, including those that harbor POLE mutations. We identified 11 POLE-mutated (POLEmut) UCS across 3 institutions and assessed the clinical, histopathologic, immunohistochemical, and molecular features of these tumors.
View Article and Find Full Text PDFInt J Mol Sci
November 2024
Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, 197758 St. Petersburg, Russia.
Targeted treatment of advanced or metastatic urothelial carcinomas (UCs) requires the identification of druggable mutations. This study describes the development of a 3' Rapid Amplification of cDNA Ends (3' RACE)-based targeted RNA sequencing panel which accounts for the status of all genes relevant to UC treatment, namely, , , , , (), () and . -activating point mutations or fusions were found in 54/233 (23.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!