Genomic structure of the human NLK (nemo-like kinase) gene and analysis of its promoter region

Recent search revealed that nemo-like kinase (NLK) was identified as a negative regulator of the wingless type signal cascade in Xenopus and in Caenorhabditis elegans. NLK phosphorylates T-cell factor (TCF)/lymphoid enhancer-binding factor (LEF) and interferes with binding of the β-catenin-TCF/LEF c...

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Veröffentlicht in:Gene 2002-02, Vol.285 (1), p.175-182
Hauptverfasser: Harada, Haruhito, Yoshida, Shoko, Nobe, Yukiko, Ezura, Yoichi, Atake, Tomoko, Koguchi, Tomoko, Emi, Mitsuru
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container_issue 1
container_start_page 175
container_title Gene
container_volume 285
creator Harada, Haruhito
Yoshida, Shoko
Nobe, Yukiko
Ezura, Yoichi
Atake, Tomoko
Koguchi, Tomoko
Emi, Mitsuru
description Recent search revealed that nemo-like kinase (NLK) was identified as a negative regulator of the wingless type signal cascade in Xenopus and in Caenorhabditis elegans. NLK phosphorylates T-cell factor (TCF)/lymphoid enhancer-binding factor (LEF) and interferes with binding of the β-catenin-TCF/LEF complex to its TCF target site. After we constructed bacterial artificial chromosome clone contig covering more than 45-kb NLK chromosomal gene, genomic cloning revealed that the human NLK gene consists of 11 exons interrupted by ten introns; its translation-initiation site is within exon 1, and the termination codon and polyadenylation signal lie in exon 11. The 289 amino acids of its kinase domain extend from the 3′-portion of exon 1 to the 5′-portion of exon 9, and show a high degree of similarity in amino acid sequence to kinase domains of extracellular-signal regulated kinase 5 (mitogen activated protein kinase 7) and cyclin-dependent kinases, although the positions of introns among those genes are not conserved. Reverse transcription polymerase chain reactions analysis in various tissues showed that NLK is expressed ubiquitously. Analysis of its promoter region by luciferase reporter assays in transfected HeLa and NIH3T3 cells revealed that an upstream region from −487 to +33 bp of the NLK gene contains significant promoter activity. This 5′-flanking region probably contains the cis-acting element of NLK. In addition, our mutation screening showed that NLK was not a mutational target in breast and colorectal tumor cells.
doi_str_mv 10.1016/S0378-1119(02)00412-2
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NLK phosphorylates T-cell factor (TCF)/lymphoid enhancer-binding factor (LEF) and interferes with binding of the β-catenin-TCF/LEF complex to its TCF target site. After we constructed bacterial artificial chromosome clone contig covering more than 45-kb NLK chromosomal gene, genomic cloning revealed that the human NLK gene consists of 11 exons interrupted by ten introns; its translation-initiation site is within exon 1, and the termination codon and polyadenylation signal lie in exon 11. The 289 amino acids of its kinase domain extend from the 3′-portion of exon 1 to the 5′-portion of exon 9, and show a high degree of similarity in amino acid sequence to kinase domains of extracellular-signal regulated kinase 5 (mitogen activated protein kinase 7) and cyclin-dependent kinases, although the positions of introns among those genes are not conserved. Reverse transcription polymerase chain reactions analysis in various tissues showed that NLK is expressed ubiquitously. Analysis of its promoter region by luciferase reporter assays in transfected HeLa and NIH3T3 cells revealed that an upstream region from −487 to +33 bp of the NLK gene contains significant promoter activity. This 5′-flanking region probably contains the cis-acting element of NLK. 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Analysis of its promoter region by luciferase reporter assays in transfected HeLa and NIH3T3 cells revealed that an upstream region from −487 to +33 bp of the NLK gene contains significant promoter activity. This 5′-flanking region probably contains the cis-acting element of NLK. In addition, our mutation screening showed that NLK was not a mutational target in breast and colorectal tumor cells.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>12039044</pmid><doi>10.1016/S0378-1119(02)00412-2</doi><tpages>8</tpages></addata></record>
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source MEDLINE; Access via ScienceDirect (Elsevier)
subjects 3T3 Cells
5' Flanking Region - genetics
5′-flanking region
Amino Acid Sequence
Animals
Base Sequence
Binding Sites - genetics
Blotting, Northern
DNA - chemistry
DNA - genetics
Exons
Female
Gene Expression Regulation, Enzymologic
Genes - genetics
Genomic structure
HeLa Cells
Humans
Introns
Kinase domain
Luciferases - genetics
Luciferases - metabolism
Mice
Mitogen-Activated Protein Kinases - genetics
Molecular Sequence Data
Nemo-like kinase (NLK)
nemo-like kinase gene
Neoplasms - enzymology
Neoplasms - genetics
Neoplasms - pathology
NLK gene
Promoter
Promoter Regions, Genetic - genetics
Recombinant Fusion Proteins - genetics
Recombinant Fusion Proteins - metabolism
RNA, Messenger - genetics
RNA, Messenger - metabolism
Sequence Alignment
Sequence Analysis, DNA
Sequence Homology, Amino Acid
Tumor Cells, Cultured
Wingless type signaling
title Genomic structure of the human NLK (nemo-like kinase) gene and analysis of its promoter region
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