Modeling Major Intrinsic Proteins in Rice, Maize, and Arabidopsis
Author Information
Author(s): Anjali Bansal, Ramasubbu Sankararamakrishnan
Primary Institution: Indian Institute of Technology, Kanpur
Hypothesis
How do the structures of major intrinsic proteins (MIPs) in rice, maize, and Arabidopsis compare in terms of transmembrane helix association and selectivity filters?
Conclusion
Rice and maize MIPs show conservation in helix-helix interfaces and diversity in aromatic/arginine selectivity filters, suggesting they can transport a wider range of solutes than Arabidopsis MIPs.
Supporting Evidence
- 39 rice and 31 maize MIPs were structurally characterized and compared with Arabidopsis MIPs.
- Small residues are highly conserved in the helix-helix interface of MIP structures.
- Rice and maize MIPs have unique ar/R selectivity filters not found in Arabidopsis.
Takeaway
This study looks at proteins that help plants move water and nutrients. It finds that some plants can move bigger things than others because of how their proteins are built.
Methodology
Homology modeling was used to build three-dimensional structures of MIPs from rice, maize, and Arabidopsis, followed by analysis of residue conservation and selectivity filters.
Limitations
The sequence identity between the modeled proteins and template structures was not very high, which may affect model reliability.
Digital Object Identifier (DOI)
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