eversion-inducing-cysteine-rich protein with Kazal motifs (RECK) was identified in an assay that characterized genes inducing flat morphology in a v-Ki-ras-transformed NIH 3T3 cell line. RECK is a glycoprotein that contains two hydrophobic regions, the C-terminal is involved in GPI-anchoring, five repeats of a putative six-cysteine knot motif, two EGF-like regions (E), and three serine-protease inhibitor-like domains (S), one of which (635-654) is a Kazal motif (C-X7-C-X6-Y-X3-C-X2.3-C). In normal human tissues, RECK is expressed ubiquitously, however it is not detectable in many malignant cell lines. Downregulation of RECK transcription in malignant cells may involve ras-dependent negative regulation of the RECK gene via an upstream promoter region that contains an Sp1 motif. Transfection of tumor cell lines with RECK can inhibit tumor invasion and metastatic activity independent of chemotactic activity. This inhibitory effect may be a result RECK-induced inhibition of MMP-9 secretion or protease activity. Thus, RECK may be an important inhibitor of matrix metalloproteinase activity and suppression of RECK may be required for both tumor cell invasion and metastasis.
原厂资料：
注意事项：
1.Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2.Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
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