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S100 CALCIUM-BINDING PROTEIN A14; S100A14 OKDB#: 1483
 Symbols: S100 CALCIUM-BINDING PROTEIN A14; S100A14 Species: human
 Synonyms:  Locus:


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General Comment Pietas A,et al 2002 reported molecular cloning and characterization of the human S100A14 gene encoding a novel member of the S100 family. S100 proteins form a growing subfamily of proteins related by Ca2+-binding motifs to the Efhand Ca2+-binding protein superfamily. By analyzing a human lung cancer cell line subtraction cDNA library, we have identified and characterized a new member of the human S100 family that we named S100A14 (GenBank acc. no. NM_020672). It encodes a mRNA present in several normal human tissues of epithelial origin, with the highest level of expression in colon. The full-length cDNA is 1067 nt in length, with a coding region predicting a protein of 104 amino acids that is 68% homologous to the S100A13 protein. The deduced amino acid sequence of the human S100A14 and its mouse homolog (identified as GenBank entry) contains two EF-hand Ca2+-binding domains, a myristoylation motif, a glycosylation site, and several potential protein kinase phosphorylation sites. The authors have mapped this gene to human chromosome 1q21, within a region where at least 15 other S100 genes are tightly clustered. A 3.2-kb genomic fragment containing the entire S100A14 was cloned and sequenced. The gene is split into four exons and three introns spanning a total of 2165 bp of genomic sequence. We examined the intracellular distribution of the epitope-tagged S100A14 protein in two human lung carcinoma cell lines and one immortalized monkey cell line. Pronounced staining was observed in the cytoplasm, suggesting an association with the plasma membrane and in the perinuclear area.Theres is also evidence for heterogenic expression of S100A14 in tumors, demonstrating its overexpression in ovary, breast, and uterus tumors and underexpression in kidney, rectum, and colon tumors, a pattern suggesting distinct regulation with potentially important functions in malignant transformation.
General function
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Cellular localization Cytoplasmic, Plasma membrane
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Ovarian function
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Expression regulated by
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Ovarian localization
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Follicle stages
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created: April 18, 2002, 7:40 a.m. by: hsueh   email:
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last update: April 18, 2002, 7:40 a.m. by: system    email:



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