The CCAAT-binding complex in the Aspergillus species, also known as the Hap complex, consists of at least three subunits, namely HapB, HapC and HapE. Each Hap subunit contains an evolutionary conserved core domain. Recently, we have found that the HapC and HapE subunits do not carry a nuclear localisation signal. Furthermore, when in complex with HapB, they are transported into the nucleus via a 'piggy back mechanism' in A. nidulans. To extend our findings to other filamentous fungi, we examined the nuclear localisation of the A. oryzae Hap subunits by analysing several GFP fusion proteins with these Hap subunits in the hap deletion strains of A. nidulans. The nuclear translocation of the A. oryzae complex was found to be dependent on two redundant localising signals in HapB.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00203-005-0014-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The histamine pathway is a target to treat hepatic experimental erythropoietic protoporphyria.
Cell Mol Gastroenterol Hepatol
January 2025
Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA. Electronic address:
Background & Aims: Erythropoietic protoporphyria (EPP) is caused by mutations in ferrochelatase which inserts iron into protoporphyrin-IX (PP-IX) to generate heme. EPP is characterized by PP-IX accumulation, skin photosensitivity, cholestasis, and end-stage liver disease. Despite available drugs that address photosensitivity, treatment of EPP-related liver disease remains an unmet need.
View Article and Find Full Text PDFBlocking p85β nuclear translocation by importazole enhances Alpelisib efficacy against PIK3CA-helical-domain-mutant tumors.
Biochem Biophys Res Commun
January 2025
State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200032, China; Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China. Electronic address:
PIK3CA, which encodes protein p110α, is one of the most frequently mutated oncogenes and a promising drug-target for human cancer. Previously, we demonstrate that p85β is released from PI3K complex which contain PIK3CA helical domain mutations and translocates into nucleus to regulate tri-methylation of H3K27, thereby promoting tumorigenicity. Here, we identify DIRAS2 and SOWAHB as target genes of nuclear p85β in PIK3CA-helical-domain-mutant tumors.
View Article and Find Full Text PDFInhibition of IKK complex by (2 methyl butyryl) Shikonin, a naturally occurring naphthoquinone, abrogates melanoma growth and progression via modulation of the IKK/NFκB /EMT signaling axis.
Int Immunopharmacol
January 2025
Pharmacology Division, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine, Jammu, Jammu and Kashmir 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India. Electronic address:
Melanoma is an aggressive form of malignancy that originates from melanin-producing cells known as melanocytes underlying the basal layer of the epidermis with a poor prognosis, low survival rates, and limited treatment options. Although several specific and effective systematic strategies for treating melanoma have been established, the underlying molecular mechanism of melanoma progression, mortality and the promising therapeutic options remain elusive. Shikonin (SK), a natural naphthoquinone derived from a medicinal herbaceous plant, has been shown to inhibit the proliferation of several cancer cells.
View Article and Find Full Text PDFKSHV hijacks the antiviral kinase IKKε to initiate lytic replication.
PLoS Pathog
January 2025
Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
IKKε is a traditional antiviral kinase known for positively regulating the production of type I interferon (IFN) and the expression of IFN-stimulated genes (ISGs) during various virus infections. However, through an inhibitor screen targeting cellular kinases, we found that IKKε plays a crucial role in the lytic replication of Kaposi's sarcoma-associated herpesvirus (KSHV). Mechanistically, during KSHV lytic replication, IKKε undergoes significant SUMOylation at both Lys321 and Lys549 by the viral SUMO E3 ligase ORF45.
View Article and Find Full Text PDFNF-B Inhibitory Activity of the Di-Hydroxy Derivative of Piperlongumine (PL-18).
J Immunol Res
January 2025
Department of Microbiology, Immunology and Genetics Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva 84105, Israel.
Inflammation is a critical response of the immune system to infection or injury, serving to repair and restore tissue homeostasis. While acute inflammation generally protects against harmful stimuli, prolonged and chronic inflammation have detrimental effects and disrupts tissue homeostasis. Due to the complex and multifactorial etiology of chronic inflammation, effective treatment remains elusive.
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!