Variant forms of upstream stimulatory factors (USFs) control the promoter activity of hTERT, the human gene encoding the catalytic subunit of telomerase.

Abstract excerpt

It is known that Myc regulates the expression of TERT, the telomerase catalytic subunit gene, by binding to E box. Here we show that another E box-binding protein, upstream stimulatory factor (USF), also regulates TERT expression. Specifically, the N-terminally truncated form of USF2 is present in telomerase-negative/resting human lymphocytes, but not in telomerase-positive/phytohemagglutinin-activated...

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