Oncogene database

4830

NME1

NME/NM23 nucleoside diphosphate kinase 1;NME1;NME/NM23 nucleoside diphosphate kinase 1

NDP kinase A|granzyme A-activated DNase|metastasis inhibition factor nm23|non-metastatic cells 1, protein (NM23A) expressed in|nucleoside diphosphate kinase A|tumor metastatic process-associated protein

17q21.3

protein-coding

OBJECTIVE: We studied p53, bcl-2, and nm23 expressions in serous benign, borderline and malignant tumors of the ovary. Our aim was to determine the association between these expressions and some clinical (patient age, tumor dimension, omenthal involvement, the presence of malignant cells in peritoneal fluid) and histopathological (grade, number of mitosis, nuclear pleomorphism, structural pattern) parameters in malignant serous tumors. MATERIAL AND METHOD: A total of 71 tumors including 29 benign, 14 borderline, and 28 malignant ovarian serous tumors were included in the study, p53, bcl-2, and nm23 immunohistochemical staining was performed on the paraffin blocks. The results were scored as (+), (++) and (+++) according to the extent of staining. RESULTS: There was no staining for p53 in benign or borderline tumors. p53 was positive in 42.9% of malignant tumors. nm23 expression was revealed as 44.8%, 64.3% and 67.9% in benign, borderline and malignant tumors, respectively. Bcl-2 was positive in only 17.2% of benign, 35.7% of borderline and 25% of malignant tumors. CONCLUSION: The p53 positivity detected only in serous carcinomas shows its role in carcinogenesis. p53 was expressed at a significantly higher rate in advanced stage carcinomas (p = 0.031). nm23 expression in benign, borderline and malignant tumors was not significantly different. nm23 positivity was higher in advanced stage carcinomas (p = 0.032). This suggest that nm23 acts like an oncogene in ovarian carcinomas. There was no significant difference between the groups in terms of bcl-2 expression.

Biosynthesis of nucleoside triphosphates is critical for bioenergetics and nucleic acid replication, and this is achieved by nucleoside diphosphate kinase (NDK). As an emerging biological model and the global importance of shrimp culture, we have addressed the study of the Pacific whiteleg shrimp (Litopenaeus vannamei) NDK. We demonstrated its activity and affinity towards deoxynucleoside diphosphates. Also, the quaternary structure obtained by gel filtration chromatography showed that shrimp NDK is a trimer. Affinity was in the micro-molar range for dADP, dGDP, dTDP and except for dCDP, which presented no detectable interaction by isothermal titration calorimetry, as described previously for Plasmodium falciparum NDK. This information is particularly important, as this enzyme could be used to test nucleotide analogs that can block white spot syndrome virus (WSSV) viral replication and to study its bioenergetics role during hypoxia and fasting.

oncoprotein NM23, as a family of genes encoding the nucleoside diphosphate (NDP) kinase, plays important roles in bioenergetics, DNA replication, differentiation and tumor metastasis. In this study, a full-length cDNA of NM23 (designated EcNM23) was cloned from Exopalaemon carinicauda by using rapid amplification of cDNA ends (RACE) approaches. The full-length cDNA of EcNM23 was 755 bp, which contains an open reading frame (ORF) of 518 bp, encoding a 175 amino-acid polypeptide with the predicted molecular weight of 19.60 kDa and estimated isoelectric point of 7.67. The deduced amino acid sequence of EcNM23 shared high identity (86%-93%) with that of other crustaceans. a NDP kinase super family signature was identified in E. carinicauda EcNM23. Quantitative real-time RT-qPCR analysis indicated that EcNM23 was expressed in ALL the examined tissues with the high expression level in hemocytes and ovary. The EcNM23 expression in immune-related tissues changed rapidly and reached peak at different time after pathogens (Vibrio parahaemolyticus and WSSV) challenge and ammonia-N stress treatment. The results suggested that EcNM23 might be associated with the immune defenses to pathogens infection and ammonia-N stress in E. carinicauda.