Studies on the function of conserved sequence motifs in the T4 Dam-[N6-adenine] and EcoRII [C5-cytosine] DNA methyltransferases
Year: 1995
Type: article
Abstract: We used site-directed oligodeoxyribonucleotide-mediated mutagenesis and kinetic studies with purified wild-type (wt) and mutant proteins to evaluate the role of the conserved sequence motifs in two prokaryotic DNA MTases. We suggest that: (i) the main role of Pro in the M.EcoRII PC-motif is to restrict the conformational freedom of Cys and orient it in a manner essential for catalysis; (ii) in both M.EcoRII and T4 Dam the FXGXG-motif positions AdoMet with respect to the catalytic site; (iii) the DPPY-motif in T4 Dam (region IV) is important for AdoMet-binding and may be part of the binding site; and (iv) the RXNXKXXFXXPFK-motif in T4 Dam (region III) is part of the DNA binding/recognition domain.
Source: Gene
Institution: University of Rochester
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $3,300
OpenAlex ID: W1968944366