HOW ENHANCERS WORK - JUXTAPOSITIONING OF DNA CONTROL ELEMENTS BY SYNERGISTIC INTERACTION OF MARS - (REVIEW-HYPOTHESIS)
The sites of attachment of chromatin loops to the nuclear matrix (MARs) seem to harbor transcriptional enhancers, promoters and origins of replication (ORIs). According to the model proposed, the cooperative interactions among classical nuclear matrix proteins which are abundant (topoisomerase II, histone H1, HMG-I(Y), lamins A, B1, SAF-A, ARBP and others) bring together distant AT-rich classical MAR sequences causing looping of DNA. This process juxtaposes enhancers, ORIs, promoters, and other control elements that cohabit with MARs loaded with the less abundant transcription factors (TFs) facilitating productive interactions between enhancers and promoters or enhancers and core ORIs. The implications of the model in the interactions of oncoproteins with regulatory DNA elements and their integration into a chromatin and nuclear matrix environment are discussed.
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Document Type: Research Article
Publication date: June 1, 1995
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- The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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