Biology Department Seminar

"The Conserved EKC/KEOPS Complex, Involved in Telomere Length Regulation, is Required for a Universal tRNA Modification, t6A"

Presented by Rolf Sternglanz, Distinguished Professor, Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY

Friday, June 8, 2012, 11:00 am — John Dunn Seminar Room, Bldg. 463

A kinase-associated protein (Kae1) is highly conserved across bacteria, archaea and eukaryotes. A highly conserved protein complex containing Kae1, a kinase, and 3 small polypeptides has been identified in yeast and implicated in transcription, telomere maintenance and chromosome segregation. We have found in yeast that this complex is required for a universal modification of tRNA, threonyl carbamoyl adenosine (t6A), which is found in all tRNAs that pair with ANN codons in mRNA. The E. coli ortholog of Kae1, YgjD, is also essential for this modification. It remains to be determined whether all reported defects of mutants of this complex can be attributed to the lack of t6A or whether the complex has multiple functions.

Hosted by: Bill Studier

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