Comparative structural analysis of cytokinin dehydrogenase enzymes of O.sativa, A. thaliana and Zea mays leading to predict the best enzyme.

Abstract

The cytokinin dehydrogenase enzymes of rice, wheat and maize were selected for this study. The enzymes of this crops show the same function i.e, leading to high grain production. The CKX1, CKX2, CKX3, CKX4, CKX5, CKX6, CKX7 and CKX8 enzymes of these three crops vary from each other on the basis of their physico-chemical analysis. A brief study has been done on all these enzymes showing the similarities, domains, secondary structures, homology models, backbone confirmations, best generated models and functions. From the study we got that Q4ADV8 of O.sativahas the best secondary structure with strong helix, turns and sheets along with highest molecular weight. A2XVN3 of O.sativahas the longest domain region, Q9FUJ1 of A.thalianahas highest numbers of total negatively charged residues (ASP+GLU) and Q9LY71 ofA.thalianahas highest numbers of total positively charged residues (ARG+LYS). The Q9LTS3 ofA.thalianahashighest VDW radius from geometric center. Q8LNV6 is the best model depending upon the Z-score calculated by ANOLEA. from the above study it is concluded that the enzymes ofO.sativaandA.thalianahas more strong physico-chemical characteristics than in comparision to the zea mays.