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Enzyme Research
New enzyme research from University of California discussed
February 3rd, 2009
"Many Ser/Thr protein kinases are activated by autophosphorylation, but the mechanism of this process has not been defined. We determined the crystal structure of a mutant of the Ser/Thr kinase domain (KD) of the mycobacterial sensor kinase PknB in complex with an ATP competitive inhibitor and discovered features consistent with an activation complex," scientists writing in the Embo Journal report. "The complex formed an asymmetric dimer, with the G helix and the ordered activation loop of one KD in contact with the G helix of the other. The activation loop of this putative 'substrate' KD was disordered, with the ends positioned at the entrance to the partner KD...
Source: TB & Outbreaks Week (2009-02-03)
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