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Rapid assessment of oxidation via middle-down LCMS correlates with methionine side-chain solvent-accessible surface area for 121 clinical stage monoclonal antibodies

, , , , , , , , , , , & show all
Pages 646-653 | Received 05 Jan 2017, Accepted 31 Jan 2017, Published online: 10 Mar 2017

Figures & data

Figure 1. Deconvoluted LCMS spectra of reduced, control and oxidized infliximab. (A) Fc; (B) LC; (C) Fd.

Figure 1. Deconvoluted LCMS spectra of reduced, control and oxidized infliximab. (A) Fc; (B) LC; (C) Fd.

Figure 2. Consolidated forced oxidation experimental results for both Fd and LC.

Figure 2. Consolidated forced oxidation experimental results for both Fd and LC.

Figure 3. Determination of optimal predicted SASA cutoff.

Figure 3. Determination of optimal predicted SASA cutoff.

Table 1. Comparison of experimental assignments versus computational predictions at 9% SASA cutoff.

Table 2. List of 11 false negatives in Fd and light chain.

Figure 4. High methionine SASA (> 9%) is indicative of HC (Fd) and LC oxidation event(s).

Figure 4. High methionine SASA (> 9%) is indicative of HC (Fd) and LC oxidation event(s).

Table 3. Peptide mapping MS2 analysis of selected samples with false negative occurrences.

Table 4. Methionine near the end of H3.

Figure 5. Water coordination number for methionine sulfur atom in a shell of radius 5.5Å. The red lines denote the running average over the simulation.

Figure 5. Water coordination number for methionine sulfur atom in a shell of radius 5.5Å. The red lines denote the running average over the simulation.
Supplemental material

Supplemental_Data.zip

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