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Research Article

Investigation of intrinsic dynamics of enzymes involved in metabolic pathways using coarse-grained normal mode analysis

ORCID Icon, , , , , , , , , , , , , , , , & | (Reviewing Editor) show all
Article: 1291877 | Received 04 Jan 2017, Accepted 02 Feb 2017, Published online: 10 Apr 2017

Figures & data

Table 1. Comprehensive list of the 24 protein groups and the six selected proteins for each group with the organism name, PDB ID, and number of amino acid residues (sequence length) in chain A of the protein

Table 2. The number of species studied (N), the sequence identity, structural similarity, and dynamic similarity (in terms of BC) of the 24 protein groups studied

Figure 1. The structure of E. coli methionine adenosyltransferase homodimer (1FUG) with the flexible gating loops shown in red and the active site residues in orange. The structure visualization was achieved with VMD.

Figure 1. The structure of E. coli methionine adenosyltransferase homodimer (1FUG) with the flexible gating loops shown in red and the active site residues in orange. The structure visualization was achieved with VMD.

Figure 2. The Cα atom fluctuations of the E. coli methionine adenosyltransferase. The fluctuations describe the flexibility of Cα atoms of the enzyme.

Notes: The residue numbers are given on the x-axis, and the amplitude of the fluctuations on the y-axis. The graph showing normalized squared fluctuations of each Cα atom and calculated using the default setting of WEBnm@.
Figure 2. The Cα atom fluctuations of the E. coli methionine adenosyltransferase. The fluctuations describe the flexibility of Cα atoms of the enzyme.

Figure 3. Dynamic cross-correlation matrices of six proteins in the methionine adenosyltransferase group with a color key depicting the correlated motions in red and anticorrelated motions in blue. The overall pattern remains consistent across all species within the group, apart from minute differences that are barely visible to the naked eye.

Figure 3. Dynamic cross-correlation matrices of six proteins in the methionine adenosyltransferase group with a color key depicting the correlated motions in red and anticorrelated motions in blue. The overall pattern remains consistent across all species within the group, apart from minute differences that are barely visible to the naked eye.

Table 3. A list of proteins with PDB codes, DCCM of the protein represented in bold, and the group BC heat map

Figure 4. A dynamic cross-correlation matrix for E. coli Methionine Adenosyltransferase (1FUG) showing the correlated (red) and anticorrelated (blue) motions between Cα atoms.

Note: The black oval on DCCM represents the anti-correlated motions between the active site (residues 247–258) and the flexible loop (residues 101–109).
Figure 4. A dynamic cross-correlation matrix for E. coli Methionine Adenosyltransferase (1FUG) showing the correlated (red) and anticorrelated (blue) motions between Cα atoms.

Figure 5. Methionine Adenosyltransferase heat map of BC showing the dynamic relatedness between proteins, with the color key at the bottom.

Notes: Red describes identical dynamics, and blue describes the most unrelated dynamics within the group. Cluster data is shown on the x- and y- axis, grouping 1FUG, 3IML, 3S82 together with 3IML being more similar to 1FUG than to 3S82. Similarly, 2P02, 3SO4, and 1QM4 form another cluster, with 1QM4 and 3SO4 being more related to each other than to 2P02.
Figure 5. Methionine Adenosyltransferase heat map of BC showing the dynamic relatedness between proteins, with the color key at the bottom.
Supplemental material

Supplementary_Materials_1_31_2017.docx

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