Analysis of interatomic Contacts of Structural Units in PDB entry:
4I2X


Contacts of Structural Units (CSU) are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332).
For CSU analysis of other PDB entry

This page provides analyses of contacts formed by:
For analysis of ligand-protein contacts, use: 3D structure can be seen in additional window with STING software for 4I2X entry

There are 6 chains in PDB entry 4I2X (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 ASP 1CYS 214
B
 GLU 1HIS 229
C
 ASP 1CYS 214
D
 GLU 1ARG 219
E
 GLU 2LEU 317
F
 GLU 2LYS 105
Residue contacts

1. List of contacts for up to 10 consecutive residues:
Chain ID from residue number to residue number


2. Detailed analyses of contacts for any single residue:
Residue number chain ID
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There are 24 helices in PDB entry 4I2X. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
79 83Right-handed 310
Helix 2
2
A
121 128Right-handed alpha
Helix 3
3
A
183 188Right-handed alpha
Helix 4
4
B
28 32Right-handed 310
Helix 5
5
B
62 65Right-handed 310
Helix 6
6
B
74 76Right-handed 310
Helix 7
7
B
162 164Right-handed 310
Helix 8
8
B
192 194Right-handed 310
Helix 9
9
B
206 209Right-handed 310
Helix 10
10
B
221 227Right-handed alpha
Helix 11
11
C
79 83Right-handed 310
Helix 12
12
C
121 126Right-handed alpha
Helix 13
13
C
183 189Right-handed alpha
Helix 14
14
D
28 32Right-handed 310
Helix 15
15
D
62 65Right-handed 310
Helix 16
16
D
87 91Right-handed 310
Helix 17
17
D
162 164Right-handed 310
Helix 18
18
D
206 209Right-handed 310
Helix 19
19
E
82 86Right-handed 310
Helix 20
20
E
217 219Right-handed 310
Helix 21
21
F
82 86Right-handed 310
Helix 22
22
F
190 193Right-handed 310
Helix 23
23
F
202 206Right-handed 310
Helix 24
24
F
217 219Right-handed 310
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There are 38 sheets in PDB entry 4I2X. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, AA, AB, AC, AD, AE, AF, AG, AH, AI, AJ, AK, AL,

There are 4 strands in A sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
4 7first strand
Strand 2
A
19 25anti-parallel
Strand 3
A
70 75anti-parallel
Strand 4
A
62 67anti-parallel
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There are 6 strands in B sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
10 14first strand
Strand 2
A
102 107parallel
Strand 3
A
84 90anti-parallel
Strand 4
A
33 38anti-parallel
Strand 5
A
45 49anti-parallel
Strand 6
A
53 54anti-parallel
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There are 4 strands in C sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
10 14first strand
Strand 2
A
102 107parallel
Strand 3
A
84 90anti-parallel
Strand 4
A
97 98anti-parallel
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There are 4 strands in D sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
114 118first strand
Strand 2
A
129 139anti-parallel
Strand 3
A
173 182anti-parallel
Strand 4
A
159 163anti-parallel
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There are 4 strands in E sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
153 154first strand
Strand 2
A
144 150anti-parallel
Strand 3
A
191 198anti-parallel
Strand 4
A
201 210anti-parallel
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There are 4 strands in F sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
3 6first strand
Strand 2
B
18 25anti-parallel
Strand 3
B
78 83anti-parallel
Strand 4
B
68 73anti-parallel
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There are 6 strands in G sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
10 12first strand
Strand 2
B
113 117parallel
Strand 3
B
92 100anti-parallel
Strand 4
B
34 39anti-parallel
Strand 5
B
46 52anti-parallel
Strand 6
B
57 60anti-parallel
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There are 4 strands in H sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
10 12first strand
Strand 2
B
113 117parallel
Strand 3
B
92 100anti-parallel
Strand 4
B
105 109anti-parallel
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There are 4 strands in I sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
126 130first strand
Strand 2
B
141 151anti-parallel
Strand 3
B
180 190anti-parallel
Strand 4
B
169 171anti-parallel
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There are 4 strands in J sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
126 130first strand
Strand 2
B
141 151anti-parallel
Strand 3
B
180 190anti-parallel
Strand 4
B
175 177anti-parallel
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There are 3 strands in K sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
157 160first strand
Strand 2
B
200 205anti-parallel
Strand 3
B
210 215anti-parallel
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There are 4 strands in L sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
4 7first strand
Strand 2
C
19 25anti-parallel
Strand 3
C
70 75anti-parallel
Strand 4
C
62 67anti-parallel
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There are 6 strands in M sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
10 14first strand
Strand 2
C
102 107parallel
Strand 3
C
84 90anti-parallel
Strand 4
C
33 38anti-parallel
Strand 5
C
45 49anti-parallel
Strand 6
C
53 54anti-parallel
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There are 4 strands in N sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
10 14first strand
Strand 2
C
102 107parallel
Strand 3
C
84 90anti-parallel
Strand 4
C
97 98anti-parallel
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There are 4 strands in O sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
114 118first strand
Strand 2
C
129 139anti-parallel
Strand 3
C
173 182anti-parallel
Strand 4
C
159 163anti-parallel
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There are 4 strands in P sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
C
153 155first strand
Strand 2
C
145 150anti-parallel
Strand 3
C
191 198anti-parallel
Strand 4
C
201 210anti-parallel
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There are 4 strands in Q sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
3 6first strand
Strand 2
D
18 25anti-parallel
Strand 3
D
78 83anti-parallel
Strand 4
D
68 73anti-parallel
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There are 6 strands in R sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
10 12first strand
Strand 2
D
113 117parallel
Strand 3
D
92 98anti-parallel
Strand 4
D
34 39anti-parallel
Strand 5
D
46 51anti-parallel
Strand 6
D
58 60anti-parallel
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There are 4 strands in S sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
10 12first strand
Strand 2
D
113 117parallel
Strand 3
D
92 98anti-parallel
Strand 4
D
108 109anti-parallel
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There are 4 strands in T sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
126 130first strand
Strand 2
D
141 151anti-parallel
Strand 3
D
180 190anti-parallel
Strand 4
D
169 171anti-parallel
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There are 4 strands in U sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
126 130first strand
Strand 2
D
141 151anti-parallel
Strand 3
D
180 190anti-parallel
Strand 4
D
175 177anti-parallel
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There are 3 strands in V sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
D
157 160first strand
Strand 2
D
200 205anti-parallel
Strand 3
D
210 215anti-parallel
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There are 2 strands in W sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
6 7first strand
Strand 2
E
26 27anti-parallel
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There are 5 strands in X sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
12 15first strand
Strand 2
E
110 114parallel
Strand 3
E
87 95anti-parallel
Strand 4
E
36 40anti-parallel
Strand 5
E
47 51anti-parallel
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There are 4 strands in Y sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
12 15first strand
Strand 2
E
110 114parallel
Strand 3
E
87 95anti-parallel
Strand 4
E
102 106anti-parallel
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There are 3 strands in Z sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
21 23first strand
Strand 2
E
76 78anti-parallel
Strand 3
E
60 62anti-parallel
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There are 4 strands in AA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
122 124first strand
Strand 2
E
135 145anti-parallel
Strand 3
E
177 186anti-parallel
Strand 4
E
164 169anti-parallel
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There are 4 strands in AB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
159 160first strand
Strand 2
E
151 156anti-parallel
Strand 3
E
195 201anti-parallel
Strand 4
E
210 215anti-parallel
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There are 4 strands in AC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
225 232first strand
Strand 2
E
238 248anti-parallel
Strand 3
E
280 289anti-parallel
Strand 4
E
269 274anti-parallel
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There are 4 strands in AD sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
E
262 263first strand
Strand 2
E
253 259anti-parallel
Strand 3
E
298 305anti-parallel
Strand 4
E
311 316anti-parallel
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There are 2 strands in AE sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
6 7first strand
Strand 2
F
26 27anti-parallel
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There are 5 strands in AF sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
12 15first strand
Strand 2
F
110 114parallel
Strand 3
F
87 96anti-parallel
Strand 4
F
36 40anti-parallel
Strand 5
F
47 51anti-parallel
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There are 4 strands in AG sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
12 15first strand
Strand 2
F
110 114parallel
Strand 3
F
87 96anti-parallel
Strand 4
F
101 106anti-parallel
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There are 3 strands in AH sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
21 23first strand
Strand 2
F
76 78anti-parallel
Strand 3
F
60 62anti-parallel
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There are 4 strands in AI sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
122 124first strand
Strand 2
F
135 145anti-parallel
Strand 3
F
177 186anti-parallel
Strand 4
F
164 169anti-parallel
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There are 4 strands in AJ sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
159 160first strand
Strand 2
F
151 156anti-parallel
Strand 3
F
195 201anti-parallel
Strand 4
F
210 215anti-parallel
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There are 4 strands in AK sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
225 229first strand
Strand 2
F
241 248anti-parallel
Strand 3
F
280 286anti-parallel
Strand 4
F
269 274anti-parallel
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There are 4 strands in AL sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
F
262 263first strand
Strand 2
F
253 259anti-parallel
Strand 3
F
300 305anti-parallel
Strand 4
F
311 314anti-parallel
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