EC Number |
Protein Variants |
Reference |
---|
2.7.2.1 | D148A |
site-directed mutagenesis |
642196 |
2.7.2.1 | D148E |
site-directed mutagenesis |
642196 |
2.7.2.1 | D148N |
site-directed mutagenesis |
642196 |
2.7.2.1 | E384A |
site-directed mutagenesis |
642191, 642196 |
2.7.2.1 | E384D |
site-directed mutagenesis |
642191 |
2.7.2.1 | E384Q |
site-directed mutagenesis |
642191 |
2.7.2.1 | E385A |
inactive |
-, 757471 |
2.7.2.1 | E97D |
reduction of both Km and kcat-value |
659856 |
2.7.2.1 | F179A |
reduced catalytic efficiency with all substrates tested |
659065 |
2.7.2.1 | G239A |
14.5fold reduced specific activity (with ATP as substrate). The wild type enzyme shows broad NTP utilization, with greater than 50% activity with CTP, GTP, TTP, UTP, and ITP versus ATP. The mutant enzyme shows a shift in NTP utilization. It displays substantially higher activity with TTP than with ATP, and activity (as a percentage of that observed with ATP) increased greatly with CTP as well. A weak increase in activity is observed with UTP. Activity with the purines GTP and ITP versus ATP decreases |
730304 |