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Prediction of ID and Its Use in Functional Proteomics 83Fig. 2. Illustrative outputs of PONDR algorithms for an illustrative IDP, N-terminal(transactivation) domain of the human progesterone receptor (residues 1-566, Swiss-Protaccession no. P06401) (Fig. 2A1,B,C) and an illustrative ordered protein, protein arginineN-methyltransferase 1 (Swiss-Prot accession no. Q99873) (Fig. 2A2,B,C). Results ofthe protein analysis by PONDR VLXT (black solid curves), VL-3B (black dashed), andVSL1 (gray curves) are shown in Fig. 2A1,A2. CDF curves for the transactivationdomain and methyltransferase are presented in Fig. 2B as solid and dashed lines,respectively. Figure 2C illustrates corresponding CH-plots, wherein the data for thetransactivation domain and methyltransferase are shown as open-crossed square and triangle,respectively. Results of α-MoRF prediction for the transactivation domain of thehuman progesterone receptor are shown as gray horizontal bars in Fig. 2A1. Sevenpotential α-MoRFs (fragments 27–44, 51–68, 128–145, 168–185, 360–377, 403–420,and 468–485) were identified. Note: on your computer screen, results of PONDR andα-MoRF predictions will be present in color: PONDR VLXT will be shown in red, VL-3Bin blue, and VSL1 in magenta curves, whereas the results of a-MoRF analysis will beshown as magenta horizontal bars. In CH-plot, data for ordered and natively unfoldedproteins are shown as blue squares and red circles, respectively.in Fig. 2C), then the protein is compact. Raw data to build this plot (results for theprotein, boundary as well as coordinates of sets of natively unfolded and orderedproteins) are in the CHARGE-HYDROPATHY OUTPUT section.4. Interpretation of PONDR data is rather straightforward. As pointed previously,high PONDR scores (more than 0.5) for all three predictors (VLXT, VL3-BA, andVSL1) are characteristic of regions with high propensity to be disordered. Some

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