pepwindow draws a set of superimposed Kyte & Doolittle hydropathy plots for a set of protein sequences.
pepwindow calculates hydropathy in windows of a specified size over the input sequences.
The EMBOSS data file 'Enakai.dat' contains :-
D Hydropathy index (Kyte-Doolittle, 1982)
R 0807099
A Kyte, J. and Doolittle, R.F.
T A simple method for displaying the hydropathic character of a protein
J J. Mol. Biol. 157, 105-132 (1982)
C CHOC760103 0.964 JANJ780102 0.922 DESM900102 0.898
EISD860103 0.897 CHOC760104 0.889 WOLR810101 0.885
RADA880101 0.884 MANP780101 0.881 EISD840101 0.878
PONP800103 0.870 NAKH920108 0.868 JANJ790101 0.867
JANJ790102 0.866 PONP800102 0.861 MEIH800103 0.856
PONP800101 0.851 PONP800108 0.850 WARP780101 0.845
RADA880108 0.842 ROSG850102 0.841 DESM900101 0.837
BIOV880101 0.829 RADA880107 0.828 LIFS790102 0.824
KANM800104 0.824 CIDH920104 0.824 MIYS850101 0.821
RADA880104 0.819 NAKH900111 0.817 NISK800101 0.812
FAUJ830101 0.811 ARGP820103 0.806 NAKH920105 0.803
ARGP820102 0.803 KRIW790101 -0.805 CHOC760102 -0.838
GUYH850101 -0.843 RACS770102 -0.844 JANJ780103 -0.845
ROSM880101 -0.845 PRAM900101 -0.850 JANJ780101 -0.852
GRAR740102 -0.859 MEIH800102 -0.871 ROSM880102 -0.878
OOBM770101 -0.899
I A/L R/K N/M D/F C/P Q/S E/T G/W H/Y I/V
1.8 -4.5 -3.5 -3.5 2.5 -3.5 -3.5 -0.4 -3.2 4.5
3.8 -3.9 1.9 2.8 -1.6 -0.8 -0.7 -0.9 -1.3 4.2
//
In calculating hydropathy, pepwindowall can use any of the amino acid parameters from the database of "Nakai et al." which are now included in the database AAINDEX. Before running pepwindow, you must first extract the required data files from AAINDEX (see "Data Files" section).
The result of running pepwindowall is the same as running pepwindow on a set of proteins with aligning gaps and superimposing the plots. It is useful for visualising the average hydropathy and its variability along an alignment.