Carbonic anhydrase IX (CA IX) is a tumor-associated, hypoxia-induced enzyme involved in pH regulation and cell adhesion. Its catalytically active ectodomain (ECD) is linked to a transmembrane region and a short intracellular (IC) tail. Removal of the IC tail causes intracellular localization of CA IX. Mutations of basic amino acids within IC do not perturb the membrane position, but reduce shedding of the CA IX ectodomain as well as CA IX-mediated cell dissociation. Moreover, they abolish the CA IX capacity to acidify extracellular pH (pHe) and bind CA IX-selective sulfonamide inhibitor in hypoxia. These findings provide the first evidence for the critical contribution of the IC tail to the proper functioning of CA IX.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.febslet.2009.10.060 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Neutral lipids restrict the mobility of broken DNA molecules during comet assays.
Biol Cell
January 2025
Centre de Recherche en Biologie cellulaire de Montpellier (CRBM), Université de Montpellier, Centre National de la Recherche Scientifique, Montpellier, France.
One widespread technique to assess in relative terms the amount of broken DNA present in the genome of individual cells consists of immobilizing the cell's nucleus under an agarose pad (called the nucleoid) and subjecting the whole genome to electrophoresis to force broken DNA molecules out of it. Since the migrating broken DNA molecules create a tail behind the nucleoid, this technique is named the comet assay. While performing comet assays regularly, we systematically observed circular regions devoid of DNA within the nucleoid region.
View Article and Find Full Text PDFCFAP65 is essential for C2a projection integrity in axonemes: implications for organ-specific ciliary dysfunction and infertility.
Cell Mol Life Sci
January 2025
State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China.
Defects in motile cilia and flagella lead to motile ciliopathies, including primary ciliary dyskinesia (PCD), which manifests as multi-organ dysfunction such as hydrocephalus, infertility, and respiratory issues. CFAP65 variants are a common cause of male infertility, but its localization and function have remained unclear. In this study, we systematically evaluated CFAP65's role using Cfap65 knockout mice and human patients with CFAP65 variants.
View Article and Find Full Text PDFPreferential Binding of a Long-Arm Porphyrin Ligand to Higher Order G-Quadruplex under Crowding Conditions.
J Phys Chem B
January 2025
College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China.
Under conditions that are close to the real cellular environment, the human telomeric single-stranded overhang (∼200 nt) consisting of tens of TTAGGG repeats tends to form higher order structures of multiple G-quadruplex (G4) blocks. On account of the higher biological relevance of higher order G4 structures, ligand compounds binding to higher order G4 are significant for the drug design toward inhibiting telomerase activity. Here, we study the interaction between a cationic porphyrin derivative, 5,10,15,20-tetra{4-[2-(1-methyl-1-piperidinyl)propoxy]phenyl}porphyrin (T4), and a human telomeric G4-dimer (AG(TAG)) in the mimic intracellular molecularly crowded environment (PEG as a crowding agent) and K or Na solution (i.
View Article and Find Full Text PDFNestin Forms a Flexible Cytoskeleton by Means of a Huge Tail Domain That Is Reversibly Stretched and Contracted by Weak Forces.
Cells
January 2025
Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 5 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan.
Nestin is a type VI intermediate filament protein and a well-known neural stem cell marker. It is also expressed in high-grade cancer cells, forming copolymerized filaments with vimentin. We previously showed that nestin inhibits the binding of vimentin's tail domain to actin filaments (AFs) by steric hindrance through its large nestin tail domain (NTD), thereby increasing three-dimensional cytoskeleton network mobility, enhancing cell flexibility, and promoting cancer progression.
View Article and Find Full Text PDFExosomes Derived from Apelin-Pretreated Mesenchymal Stem Cells Ameliorate Sepsis-Induced Myocardial Dysfunction by Alleviating Cardiomyocyte Pyroptosis via Delivery of miR-34a-5p.
Int J Nanomedicine
January 2025
School of Medicine, South China University of Technology, Guangzhou, Guangdong, People's Republic of China.
Background: Exosomes sourced from mesenchymal stem cells (MSC-EXOs) have become a promising therapeutic tool for sepsis-induced myocardial dysfunction (SMD). Our previous study demonstrated that Apelin pretreatment enhanced the therapeutic benefit of MSCs in myocardial infarction by improving their paracrine effects. This study aimed to determine whether EXOs sourced from Apelin-pretreated MSCs (Apelin-MSC-EXOs) would have potent cardioprotective effects against SMD and elucidate the underlying mechanisms.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!