• Title/Summary/Keyword: zinc-finger

Search Result 182, Processing Time 0.025 seconds

Regulation of nsdD Expression in Aspergillus nidulans

  • Han, Kap-Hoon;Han, Kyu-Yong;Kim, Min-Su;Lee, Dong-Beom;Kim, Jong-Hak;Chae, Suhn-Kee;Chae, Keon-Sang;Han, Dong-Min
    • Journal of Microbiology
    • /
    • v.41 no.3
    • /
    • pp.259-261
    • /
    • 2003
  • The nsdD gene has been predicted to encode a GATA type transcription factor with the type IVb zinc finger DNA binding domain functions in activating sexual development of A. nidulans. In several allelic mutants of nsdD producing truncated NsdD polypeptides lacking the C-terminal zinc finger, the transcription level of nsdD gene was greatly increased. Also in an over-expressed mutant, the transcription under its own promoter was reduced. These results suggest that the expression of nsdD is negatively autoregulated. When the nsdD gene was over-expressed, cleistothecia were formed in excess amounts even in the presence of 0.6 M KC1 that inhibited sexual development of the wild type. Northern blot analysis revealed that the expression of nsdD was repressed by 0.6 M KC1. These results strongly suggest that the inhibition of sexual development by salts was carried out via the nsdD involved regulatory network.

Periventricular nodular heterotopia in a child with a mild Mowat-Wilson phenotype caused by a novel missense mutation of ZEB2

  • Kim, Young Ok;Lee, Yun Young;Kim, Myeong-Kyu;Woo, Young Jong
    • Journal of Genetic Medicine
    • /
    • v.16 no.2
    • /
    • pp.71-75
    • /
    • 2019
  • Periventricular nodular heterotopia (PNH) is a malformation of cortical development in which normal neurons inappropriately cluster in periventricular areas. Patients with Mowat-Wilson syndrome (MWS) typically present with facial gestalt, complex neurologic problems (e.g., severe developmental delay with marked speech impairment and epilepsy), and multiple anomalies (e.g., Hirschsprung disease, urogenital anomalies, congenital heart defects, eye anomalies, and agenesis of the corpus callosum [CC]). MWS is mostly caused by haploinsufficiency of the gene encoding zinc-finger E-box-binding homeobox 2 (ZEB2) due to premature stops or large deletions. We present a case report of a 9-year-old girl with PNH, drug-responsive epilepsy, severe intellectual disability, and facial dysmorphisms only in whom we performed whole-exome sequencing and found a de novo heterozygous missense mutation (c.3134A>C; p.His1045Pro) of ZEB2 (NM_014795.3; NP_055610.1). This mild case of MWS caused by a rare novel missense mutation of ZEB2 represents the first report of MWS with isolated PNH.

Zinc finger protein 143 expression is closely related to tumor malignancy via regulating cell motility in breast cancer

  • Paek, A Rome;Mun, Ji Young;Hong, Kyeong-Man;Lee, Jongkeun;Hong, Dong Wan;You, Hye Jin
    • BMB Reports
    • /
    • v.50 no.12
    • /
    • pp.621-627
    • /
    • 2017
  • We previously reported the involvement of zinc-finger protein 143 (ZNF143) on cancer cell motility in colon cancer cells. Here, ZNF143 was further characterized in breast cancer. Immunohistochemistry was used to determine the expression of ZNF143 in normal tissues and in tissues from metastatic breast cancer at various stages. Notably, ZNF143 was selectively expressed in duct and gland epithelium of normal breast tissues, which decreased when the tissue became malignant. To determine the molecular mechanism how ZNF143 affects breast cancer progression, it was knocked down by infecting benign breast cancer cells with short-hairpin (sh) RNA-lentiviral particles against ZNF143 (MCF7 sh-ZNF143). MCF7 sh-ZNF143 cells showed different cell-cell contacts and actin filament (F-actin) structures when compared with MCF7 sh-Control cells. In migration and invasion assays, ZNF143 knockdown induced increased cellular motility in breast carcinoma cells. This was reduced by the recovery of ZNF143 expression. Taken together, these results suggest that ZNF143 expression contributes to breast cancer progression.

Functional Analysis of Pepper Cys2/His-Type Zinc-Finger Protein Promoter Region in Response to Bacterial Infection and Abiotic Stresses in Tobacco Using Agrobacterium-Mediated Transient Assay

  • Kim, Sang-Hee;Hwang, Byung-Kook
    • The Plant Pathology Journal
    • /
    • v.21 no.1
    • /
    • pp.39-46
    • /
    • 2005
  • The promoter region flanking the 5’ CAZFP1 coding region was isolated from the genomic DNA of Capsicum annuum. To identify the upstream region of the CAZFP1 gene required for promoter activity, a series of CAZFP1 promoter deletion derivatives was created. Each deletion construct was analyzed by Agrobacterium-mediated transient transformation in tobacco leaves after infection by Pseudomonas syringae pv. tabaci, or treatment with methyl jasmonate (MeJA), ethylene, abscisic acid (ABA), salicylic acid (SA), cold and wounding. Promoter fragments of 685 bp or longer showed 7-fold or greater induction after P. s. pv. tabaci infection and MeJA treatment. The CAZFP1 full-length promoter (-999 bp) also showed 6-fold induction in response to ethylene. The transiently transformed tobacco leaves with the CAZFP1 full length promoter fused-GUS gene showed more than 5-fold induction in response to SA, ABA and cold. These results suggest that the CAZFP1 promoter contains responsive elements for pathogen, MeJA, ethylene, SA, ABA and cold.

Identification of the DNA Binding Element of the Human ZNF333 Protein

  • Jing, Zhe;Liu, Yaping;Dong, Min;Hu, Shaoyi;Huang, Shangzhi
    • BMB Reports
    • /
    • v.37 no.6
    • /
    • pp.663-670
    • /
    • 2004
  • ZNF 333 is a new and sole gene containing two KRAB domains which has been identified currently. It is a member of subfamilies of zinc finger gene complex which had been localized on chromosome 19p13.1. The ZNF333 gene mainly encodes a 75.5 kDa protein which contains 10 zinc finger domains. Using the methods of random oligonucleotide selection assay, electromobility gel shift assay and luciferase activity assay, we found that ZNF333 recognized the specific DNA core binding sequence ATAAT. Moreover, these data indicated that the KRAB domain of ZNF333 really has the ability of transcriptional repression.

Zinc Finger E-box binding Homeobox 1 as Prognostic Biomarker and its Correlation with Infiltrating Immune Cells and Telomerase in Lung Cancer

  • Kim, Hye-Ran;Seo, Choong-Won;Kim, Jongwan
    • Biomedical Science Letters
    • /
    • v.28 no.1
    • /
    • pp.9-24
    • /
    • 2022
  • The aim of this study was to identify the expression of zinc finger E-box binding homeobox 1 (ZEB1), its prognostic significance, and correlation between ZEB1 and infiltrating immune cells in lung cancer. Correlation between ZEB1 and telomerase was also analyzed in different types of cancers. RNA sequencing analysis and survival rates of patients were confirmed by Gene Expression Profiling Interactive Analysis (GEPIA). The Kaplan-Meier plotter and PrognoScan databases were used to analyze the prognostic value of ZEB1 in various cancers. The Tumor IMmune Estimation Resource (TIMER) was used to determine the correlation between ZEB1 and infiltrating immune cells. Lower ZEB1 expression was lower in lung cancer and was related to poor prognosis in lung adenocarcinoma (LUAD). ZEB1 expression exhibited a significantly positive correlation with infiltration levels of immune cells in LUAD and lung squamous cell carcinoma. Furthermore, we found that the ZEB1 expression correlated with subunits of telomerase. Our findings suggest ZEB1 as a potential biomarker to be used for prognostic significance and tumor immunology in lung cancer. The correlation between the expression of ZEB1 and telomere-related gene will help in understand the cancer-promoting mechanisms.