Supplement for:
Analysis of six types of protein-protein interfaces
Table 1S: Amino acid composition between internal and external interfaces ∆
|
|
internal |
external |
|
internal |
98.5 |
1.5 |
|
external |
1.3 |
98.7 |
∆ Numbers give the percentage of how often the amino acid compositions of 1000 residues drawn at random from interface type X were most similar to different sets of 1000 residues drawn at random from one of the two interface types ('-' indicates values < 0.0). All values on the diagonal reflect the correct identification in our find-self test of the respective class. Off-diagonal elements reflect the confusion. The maximal standard deviation for each cell in the table is 4.4 percentage points.
Table 2S: Significant difference between amino acid composition of six interface types and residues that do not form contacts of any type∆
|
|
internal |
external |
no contact |
||||||
|
|
intra-domain |
domain-domain |
homo obligomer |
homo complex |
hetero obligomer |
hetero-complex |
no contact |
||
|
intra-domain |
73.3 |
20.2 |
0.7 |
|
5.6 |
0.2 |
|
||
|
domain-domain |
17.5 |
63.5 |
1.3 |
|
16.7 |
1.0 |
|
||
|
homo obligomer |
0.3 |
1.6 |
79.0 |
|
2.1 |
17.0 |
|
||
|
homo complex |
|
|
0.1 |
99.9 |
|
|
|
||
|
hetero obligomer |
3.6 |
17.5 |
1.7 |
|
72.0 |
5.2 |
|
||
|
hetero-complex |
|
1.8 |
17.0 |
|
4.8 |
76.4 |
|
||
|
no contact |
|
|
|
|
|
|
100.0 |
||
Same procedure as in Table 1, this time we included all the residues in our data sets that did not form contact of any type as a separate category
Table 3S: Significant difference between amino acid composition of six interface types and SWISS-PROT∆
|
|
internal |
external |
SWISS-PROT |
||||||
|
|
intra-domain |
domain-domain |
homo obligomer |
homo complex |
hetero obligomer |
hetero-complex |
|
||
|
intra-domain |
73.8 |
20.1 |
0.7 |
|
3.9 |
0.1 |
1.4 |
||
|
domain-domain |
17.3 |
62.3 |
1.5 |
|
17.6 |
1.1 |
0.2 |
||
|
homo obligomer |
0.7 |
1.3 |
76.0 |
|
3.2 |
18.1 |
0.7 |
||
|
homo complex |
|
|
|
100.0 |
|
|
|
||
|
hetero obligomer |
3.4 |
16.9 |
3.1 |
|
71.5 |
4.3 |
0.8 |
||
|
hetero-complex |
|
1.3 |
18.7 |
|
6.3 |
73.7 |
|
||
|
SWISS-PROT |
2.2 |
0.5 |
1.8 |
|
2.3 |
0.1 |
93.1 |
||
Same procedure as in Table 1, this time we included all the residues in SWISS-PROT as a separate category.