Isolation and characterization of a novel zinc finger gene, ZNFD, activating AP1(PMA) transcriptional activities.
ZFPs (Zinc Finger Proteins) play important roles in various cellular functions, including transcriptional activation, transcriptional repression, cell proliferation, and development. C(2)H(2) (Cys-Cys-His-His motif) ZFPs are the most abundant proteins among the founding members of the ZFP super family in eukaryotes. In this study, we isolate a novel C(2)H(2) ZNF (Zinc Finger) gene ZNFD. It contains an ORF (Open Reading Frame) with a length of 990 bp, encoding 329 amino acids. The predicted protein contains a C(2)H(2) zinc finger. RT-PCR analysis in 18 human adult tissues indicated that it was expressed in five human adult tissues. Green fluorescence protein localization analysis showed that human ZNFD was located in the nucleus of Hela cells. Overexpression of ZNFD in the COS7 cells activates the transcriptional activities of AP1(PMA) (Activator of protein 1, that responds specifically to phorbol ester). Together the data indicate that ZNFD is probably a new type of C(2)H(2) ZFP and the ZNFD protein may act as a transcriptional activator in PKC (protein kinase C) signal pathway to mediate cellular functions.
Lei
Chen
C
Department of Biochemistry and Molecular Biology, Medical College, Soochow University, Suzhou 215123, China.
Liu
Qingmei
Q
Wang
Weiping
W
Li
Jun
J
Xu
Fengqin
F
Liu
Yuanze
Y
Liu
Jiajia
J
Wu
Shiliang
S
Wang
Minghua
M
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D019556:COS Cells; D002467:Cell Nucleus / Q000378:metabolism*; D002522:Chlorocebus aethiops; D004268:DNA-Binding Proteins / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D004789:Enzyme Activation; D005260:Female; D006367:HeLa Cells; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D016366:Open Reading Frames; D011493:Protein Kinase C / Q000378:metabolism*; D015534:Trans-Activators / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D018808:Transcription Factor AP-1 / Q000378:metabolism*; D014162:Transfection; D016335:Zinc Fingers
D004268:DNA-Binding Proteins; C552235:FAM170A protein, human; D009687:Nuclear Proteins; D015534:Trans-Activators; D018808:Transcription Factor AP-1; D011493:Protein Kinase C