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Automating data analysis for hydrogen/deuterium exchange mass spectrometry using data-independent acquisition methodology

Journal Article · · Nature Communications
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [1];  [1]
  1. Univ. of Calgary, AB (Canada)
  2. Trajan Scientific & Medical, Raleigh, NC (United States)
  3. Thermo Fisher Scientific, San Jose, CA (United States)
  4. Harvard Medical School, Boston, MA (United States)
  5. Univ. of Texas, Houston, TX (United States). MD Anderson Cancer Center; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
We present a hydrogen/deuterium exchange workflow coupled to tandem mass spectrometry (HX-MS2) that supports the acquisition of peptide fragment ions alongside their peptide precursors. The approach enables true auto-curation of HX data by mining a rich set of deuterated fragments, generated by collisional-induced dissociation (CID), to simultaneously confirm the peptide ID and authenticate MS1-based deuteration calculations. The high redundancy provided by the fragments supports a confidence assessment of deuterium calculations using a combinatorial strategy. The approach requires data-independent acquisition (DIA) methods that are available on most MS platforms, making the switch to HX-MS2 straightforward. Importantly, we find that HX-DIA enables a proteomics-grade approach and wide-spread applications. Considerable time is saved through auto-curation and complex samples can now be characterized and at higher throughput. We illustrate these advantages in a drug binding analysis of the ultra-large protein kinase DNA-PKcs, isolated directly from mammalian cells.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
Canada Discovery Grants; National Institutes of Health (NIH); USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2470753
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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