Bacillus anthracis, the spore-forming agent of anthrax, requires iron for growth and is capable of scavenging heme-iron during infection. We show here that the B. anthracis iron-regulated surface determinants (isd) locus encompasses isdC, specifying a heme-iron binding surface protein. Anchoring of IsdC to the cell wall envelopes of vegetative bacilli requires srtB, which encodes sortase B. Purified sortase B cleaves IsdC between the threonine and the glycine of its NPKTG motif sorting signal. B. anthracis variants lacking either isdC or srtB display defects in heme-iron scavenging, suggesting that IsdC binding to heme-iron in the cell wall envelope contributes to bacterial uptake of heme.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1698196 | PMC |
| http://dx.doi.org/10.1128/JB.01011-06 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Distinct phenotypes in the preeclamptic-like mouse model induced by adenovirus carrying sFlt1 and recombinant sFlt1 protein.
Eur J Med Res
December 2024
Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, 200092, China.
Background: Preeclampsia (PE) is a pregnancy-specific, multisystemic disorder that affects 2-8% pregnancies worldwide and is a leading cause of maternal and perinatal mortality. At present, there is no cure for PE apart from delivery the placenta. Therefore, it is important and urgent to possess a suitable animal model to study the pathology and treatment of PE.
View Article and Find Full Text PDFDNMT1-driven methylation of RORA facilitates esophageal squamous cell carcinoma progression under hypoxia through SLC2A3.
J Transl Med
December 2024
Department of Thoracic Surgery, School of Clinical Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Henan University, No.7, Wei Wu Road, Jinshui District, Zhengzhou, Henan, 450003, China.
Background: The RAR-related orphan receptor alpha (RORA), a circadian clock molecule, is highly associated with anti-oncogenes. In this paper, we defined the precise action and mechanistic basis of RORA in ESCC development under hypoxia.
Methods: Expression analysis was conducted by RT-qPCR, western blotting, immunofluorescence (IF), and immunohistochemistry (IHC) assays.
Programmed cell death 1 inhibitor alone or combined with chemotherapy for patients with locally advanced or metastatic urothelial carcinoma: a single-center experience.
BMC Urol
December 2024
Department of Radiation Oncology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China.
Background: Immune checkpoint inhibitors (ICIs) alone or in combination with standard chemotherapy for advanced urothelial carcinoma (UC) have been tested as first-line treatment in clinical trials. This study aimed to evaluate the clinical outcomes of programmed cell death 1 (PD-1) inhibitor alone or combined with chemotherapy for patients with locally advanced or metastatic UC in a real world clinical care setting, and sought to identify prognostic factors for overall survival (OS).
Methods: A retrospective, real-world study involving 35 locally advanced or metastatic UC patients treated with PD-1 inhibitor alone or in combination with chemotherapy was conducted.
Schistosoma sex-biased microRNAs regulate ovarian development and egg production by targeting Wnt signaling pathway.
Commun Biol
December 2024
Shanghai Tenth People's Hospital, Institute for Infectious Diseases and Vaccine Development, School of Medicine, Tongji University, Shanghai, China.
Adult Schistosoma produces a large number of eggs that play essential roles in host pathology and disease dissemination. Consequently, understanding the mechanisms of sexual maturation and egg production may open a new avenue for controlling schistosomiasis. Here, we describe that Bantam miRNA and miR-1989 regulate Wnt signaling pathway by targeting Frizzled-5/7/9, which is involved in ovarian development and oviposition.
View Article and Find Full Text PDFEvolution of SARS-CoV-2 spike trimers towards optimized heparan sulfate cross-linking and inter-chain mobility.
Sci Rep
December 2024
Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Waldeyerstrasse 15, D-48149, Münster, Germany.
The heparan sulfate (HS)-rich extracellular matrix (ECM) serves as an initial interaction site for the homotrimeric spike (S) protein of SARS-CoV-2 to facilitate subsequent docking to angiotensin-converting enzyme 2 (ACE2) receptors and cellular infection. More recent variants, notably Omicron, have evolved by swapping several amino acids to positively charged residues to enhance the interaction of the S-protein trimer with the negatively charged HS. However, these enhanced interactions may reduce Omicron's ability to move through the HS-rich ECM to effectively find ACE2 receptors and infect cells, raising the question of how to mechanistically explain HS-associated viral movement.
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!