Analysis of interatomic Contacts of Structural Units in PDB entry:
2A1A


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 2A1A entry


Note, this PDB entry contains modified residue(s) PHOSPHOTHREONINE (TPO) . This residue is treated as heterogroup (ligand) both in the PDB entry and in LPC/CSU analysis.

There are 3 chains in PDB entry 2A1A (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 SER 3ARG 175
B
 GLY 255ARG 445
B
 ARG 447LYS 541
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 18 helices in PDB entry 2A1A. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
90 119Right-handed alpha
Helix 2
2
A
121 129Right-handed alpha
Helix 3
3
A
129 138Right-handed alpha
Helix 4
4
A
139 150Right-handed alpha
Helix 5
5
A
151 155Right-handed 310
Helix 6
6
A
161 172Right-handed alpha
Helix 7
7
B
260 266Right-handed alpha
Helix 8
8
B
302 305Right-handed 310
Helix 9
9
B
306 313Right-handed alpha
Helix 10
10
B
373 382Right-handed alpha
Helix 11
11
B
387 408Right-handed alpha
Helix 12
12
B
416 418Right-handed 310
Helix 13
13
B
456 461Right-handed alpha
Helix 14
14
B
467 483Right-handed alpha
Helix 15
15
B
487 500Right-handed alpha
Helix 16
16
B
508 519Right-handed alpha
Helix 17
17
B
522 526Right-handed 310
Helix 18
18
B
528 540Right-handed alpha
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There are 4 sheets in PDB entry 2A1A. Click on sheet of interest to get list of strands forming it: A, B, C, D,

There are 6 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
18 26first strand
Strand 2
A
30 35anti-parallel
Strand 3
A
42 46anti-parallel
Strand 4
A
81 85parallel
Strand 5
A
67 76anti-parallel
Strand 6
A
18 26anti-parallel
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There are 5 strands in B sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
267 275first strand
Strand 2
B
279 286anti-parallel
Strand 3
B
292 299anti-parallel
Strand 4
B
358 367anti-parallel
Strand 5
B
323 332anti-parallel
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There are 2 strands in C sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
410 412first strand
Strand 2
B
436 438anti-parallel
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There are 2 strands in D sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
420 424first strand
Strand 2
B
427 430anti-parallel
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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il