Short Strong Hydrogen Bonds in Proteins
Author Information
Author(s): Annette Langkilde, Søren M. Kristensen, Leila Lo Leggio, Anne Mølgaard, Jan H. Jensen, Andrew R. Houk, Jens-Christian Navarro Poulsen, Sakari Kauppinen, Sine Larsen
Primary Institution: University of Copenhagen
Hypothesis
What is the role of short strong hydrogen bonds in the structure and function of rhamnogalacturonan acetylesterase?
Conclusion
The study identifies a buried hydrogen bond between Asp75 and Asp87 as the likely source of a low-field NMR signal, highlighting the significance of short strong hydrogen bonds in protein stability and function.
Supporting Evidence
- The study determined the crystal structure of the D192N variant of rhamnogalacturonan acetylesterase to 1.33 Å resolution.
- 1H NMR spectra showed a distinct low-field signal at 18.2 p.p.m. associated with short strong hydrogen bonds.
- Comparative analysis with database statistics revealed that similar short hydrogen bonds are common in proteins.
Takeaway
This study found that tiny connections called hydrogen bonds in a protein help it stay strong and work properly, and one specific bond was linked to a special signal in tests.
Methodology
The study used structure determination, 1H NMR spectroscopy, and computational methods to analyze the hydrogen bonds in rhamnogalacturonan acetylesterase.
Limitations
The exact protonization state of side chains could not be determined, which may affect the analysis of hydrogen bonds.
Digital Object Identifier (DOI)
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