Words similar to decatenation
Example sentences for: decatenation
How can you use “decatenation” in a sentence? Here are some example sentences to help you improve your vocabulary:
The transesterification domains of these eukaryotic enzymes have high degrees of identity to E. coli DNA topoisomerase III [ 7 37 ] . However, the decatenation loop is not present in the eukaryotic topoisomerase III sequences and to date the decatenation activity has not been demonstrated for these enzymes.
The presence of this decatenation loop instead of the Zn(II) binding ZD domain in topoisomerase III may account for the dominance of the decatenation activity over the relaxation activity.
The double-stranded DNA-binding activity in E. coli topoisomerase III required for highly efficient decatenation activity is attributed to a 17-amino-acid residue with no counterpart in E. coli topoisomerase I [ 28 29 ] . It may be required for interaction with the passing double-strand of DNA in the decatenation mechanism.
The relaxation and decatenation activities of T. maritima topoisomerase I appear to be significantly more efficient than those of the E. coli topoisomerase I [ 33 ] . Based on their primary sequences, a number of bacterial topoisomerase I enzymes do not appear to coordinate any Zn(II) with tetracysteines motifs while other type IA topoisomerase has up to 4 tetracysteine motifs [ 7 ] . The topoisomerase I from Mycobacterium smegmatis has been demonstrated biochemically not to bind Zn(II) [ 34 ] . In contrast, mutation disrupting the fourth Zn(II) motif of Helicobacter pylori topoisomerase I abolished enzyme function in vivo [ 35 ] . Therefore there may be significant differences in the mechanisms of type IA topoisomerases from different organisms with respect to requirement of Zn(II) binding for relaxation activity.
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