New Amino Acid Rotamers with Hydrogen Atoms
Author Information
Author(s): Ho Bosco K, Agard David A
Primary Institution: Department of Biochemistry, Howard Hughes Medical Institute, University of California, San Francisco
Hypothesis
Do certain sidechain torsion angles involving hydrogen atoms display rotameric preferences?
Conclusion
Knowledge of these new rotamers will improve the evaluation of hydrogen-bonding networks in protein structures.
Supporting Evidence
- The study identified new rotamers that involve hydroxyl-hydrogen atoms of Ser, Thr, and Tyr, and the sulfhydryl-hydrogen atom of Cys.
- The χ2 rotamers in Ser, Thr, and Cys are consistent with tetrahedral bonding.
- The χ3 rotamers in Tyr are consistent with trigonal-planar bonding.
Takeaway
Scientists found new ways that certain parts of proteins can twist, which helps us understand how proteins interact with each other.
Methodology
The study analyzed high-resolution crystal structures to identify rotamers involving hydrogen atoms.
Limitations
The reported positions of hydrogen atoms in some high-resolution structures may be artifacts of automatic placement.
Digital Object Identifier (DOI)
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