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Computer-aided NMR assay for detecting natively folded structural domains.
Takayuki Hondoh1, Atsushi Kato, Shigeyuki Yokoyama
1Protein Research Group, RIKEN Genomic Sciences Center, Tsurumi, Yokohama 230-0045, Japan.
Protein Science : a Publication of the Protein Society
|March 9, 2006
Summary
This study introduces a rapid method to identify and assess protein structural domains using computational predictions and experimental validation. This approach accelerates structural genomics by efficiently identifying natively folded and novel protein domains.
Area of Science:
- Structural biology
- Genomics
- Biochemistry
Background:
- Structural genomics aims to determine protein structures efficiently.
- Dissecting large proteins into stable structural domains is crucial but often empirical and time-consuming.
- Rapid identification of suitable protein domains is needed for large-scale structure determination.
Purpose of the Study:
- To develop a streamlined strategy for identifying and assessing protein structural domains.
- To accelerate the process of domain dissection for structural genomics initiatives.
- To evaluate the structural integrity and novelty of predicted protein domains.
Main Methods:
- Combined computational prediction of putative protein domains with experimental validation using Nuclear Magnetic Resonance (NMR) and biochemical assays.
- Utilized the PASS program for domain prediction from Thermus thermophilus HB8 sequences.
- Developed a rapid, 6-hour His-tag-based purification protocol for efficient sample quality evaluation.
Main Results:
- Half of the computationally predicted structural domains were confirmed as natively folded via HSQC spectra.
- Two novel, natively folded domains were identified, lacking homology in Pfam and SMART databases.
- The integrated computational and experimental approach significantly reduced the time for domain assessment.
Conclusions:
- The developed strategy provides an efficient method for identifying and validating protein structural domains.
- This approach enhances the capability of structural genomics to cover diverse protein fold spaces.
- The identification of novel domains contributes to expanding the known protein structural repertoire.