An acid phosphatase, designated SapS, hydrolyzing p-nitrophenyl phosphate (pNPP), was identified and characterized from the culture supernatant of a Staphylococcus aureus strain isolated from vegetables. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis of the protein indicated an estimated molecular mass of 30 kDa. The enzyme displayed optimum activity at 40 degrees C and pH 5. Characterization of the phosphatase in a reconstitution assay showed that MgCl2 and Triton X-100, respectively, restored maximal activity, but not CaCl2 The phosphatase activity was affected by EDTA and sodium molybdate. The DNA sequence encoding SapS was cloned and sequenced. The putative acid phosphatase gene encodes a protein of 296 amino acids with a 31-residue signal peptide. Database searches revealed significant structural homology of SapS to several proteins belonging to the bacterial class C family of nonspecific acid phosphatases. Comparison of the sequences indicated that despite a low level of overall conservation between the proteins, four conserved sequence motifs could be identified.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1078/0723-2020-00098 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
SHP2 promotes the epithelial-mesenchymal transition in triple negative breast cancer cells by regulating β-catenin.
J Cancer Res Clin Oncol
January 2025
Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China.
Purpose: Growing evidence suggests that the tyrosine phosphatase SHP2 is pivotal for tumor progression. Triple-negative breast cancer (TNBC) is the most lethal subtype of breast cancer, characterized by its high recurrence rate, aggressive metastasis, and resistance to chemotherapy. Understanding the mechanisms of tumorigenesis and the underlying molecular pathways in TNBC could aid in identifying new therapeutic targets.
View Article and Find Full Text PDFIntestinal Epithelial Ptpn23 Is Essential For Gut Barrier Integrity And Prevention Of Fatal Bacterial Translocation.
J Crohns Colitis
January 2025
Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Background And Aims: Protein tyrosine phosphatase non-receptor type 23 (PTPN23) regulates the internalization of growth factor receptors such as the epithelial growth factor receptor (EGFR). Given the crucial function of such receptors in intestinal epithelial cells (IECs), we assessed the involvement of PTPN23 in intestinal homeostasis and epithelial proliferation.
Methods: We generated mouse models with constitutive (PTPN23fl/flVilCre+/-) or inducible (PTPN23fl/flVilCreERT+/-) deletion of PTPN23 in IEC.
Optimized human dedifferentiated fat cells from the buccal fat pad-derived osteoinductive extracellular vesicles promote osteoblast differentiation.
J Dent Sci
January 2025
Second Department of Oral and Maxillofacial Surgery, Osaka Dental University, Osaka, Japan.
Background/purpose: Bone reconstruction in the maxillofacial region typically relies on autologous bone grafting, which presents challenges, including donor site complications and graft limitations. Recent advances in tissue engineering have identified highly pure and proliferative dedifferentiated fat cells (DFATs) as promising alternatives. Herein, we explored the capacity for osteoblast differentiation and the osteoinductive characteristics of extracellular vesicles derived from DFATs (DFAT-EVs).
View Article and Find Full Text PDFEnhancement of titanium surfaces using different acid solutions at room temperature to improve bone cell responses.
J Dent Sci
January 2025
School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
Background/purpose: Early osseointegration of titanium (Ti) dental implants relies on the surface topography. Surface modification of Ti seeks to enhance bone regeneration around implants. Acid etching is the simple, less technique sensitive and cost-effective technique for surface treatment.
View Article and Find Full Text PDFEnamel renal gingival syndrome in Indian scenario: A systematic review.
Med J Armed Forces India
October 2024
Commandant, Army Dental Centre (Research & Referral), New Delhi, India.
Background: Enamel renal gingival syndrome (ERS) is a genetic disorder caused by mutations in the FAM20A gene located on long arm of chromosome 17. It is characterized by presence of intra-oral features like hypoplastic type of amelogenesis imperfecta, fibromatosis of gingiva and nephrocalcinosis in addition to delayed eruption. The oral phenotype is evident in childhood, whereas the renal involvement is clinically silent at this age and requires further investigation for detection at later age.
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!