Analysis of interatomic Contacts of Structural Units in PDB entry:
1IQA

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).
This page provides analyses of contacts formed by:

chains
helices
sheets
residues

For analysis of ligand-protein contacts, use:

LPC software

3D structure can be seen in additional window with STING software for 1IQA entry

There are 3 chains in PDB entry 1IQA (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	ALA 161	ASP 316
B	ALA 161	ASP 316
C	ALA 161	ASP 316

There are 6 helices in PDB entry 1IQA. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	226	228	Right-handed 310
Helix 2	2	A	294	297	Right-handed 310
Helix 3	3	B	226	228	Right-handed 310
Helix 4	4	B	294	297	Right-handed 310
Helix 5	5	C	226	228	Right-handed 310
Helix 6	6	C	294	297	Right-handed 310

There are 12 sheets in PDB entry 1IQA. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L,

There are 5 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	269	282	first strand
Strand 2	A	211	224	anti-parallel
Strand 3	A	306	313	anti-parallel
Strand 4	A	164	169	anti-parallel
Strand 5	A	186	187	anti-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	A	269	282	first strand
Strand 2	A	211	224	anti-parallel
Strand 3	A	306	313	anti-parallel
Strand 4	A	164	169	anti-parallel
Strand 5	A	194	196	anti-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	252	262	first strand
Strand 2	A	234	245	anti-parallel
Strand 3	A	286	292	anti-parallel
Strand 4	A	181	182	anti-parallel

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There are 5 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	252	262	first strand
Strand 2	A	234	245	anti-parallel
Strand 3	A	286	292	anti-parallel
Strand 4	A	204	207	anti-parallel
Strand 5	A	198	201	anti-parallel

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There are 5 strands in E sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	269	282	first strand
Strand 2	B	211	224	anti-parallel
Strand 3	B	306	313	anti-parallel
Strand 4	B	164	169	anti-parallel
Strand 5	B	186	187	anti-parallel

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There are 5 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	269	282	first strand
Strand 2	B	211	224	anti-parallel
Strand 3	B	306	313	anti-parallel
Strand 4	B	164	169	anti-parallel
Strand 5	B	194	196	anti-parallel

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There are 4 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	252	262	first strand
Strand 2	B	234	244	anti-parallel
Strand 3	B	287	292	anti-parallel
Strand 4	B	181	183	anti-parallel

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There are 5 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	252	262	first strand
Strand 2	B	234	244	anti-parallel
Strand 3	B	287	292	anti-parallel
Strand 4	B	204	207	anti-parallel
Strand 5	B	198	201	anti-parallel

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There are 5 strands in I sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	269	282	first strand
Strand 2	C	211	224	anti-parallel
Strand 3	C	306	313	anti-parallel
Strand 4	C	164	169	anti-parallel
Strand 5	C	186	187	anti-parallel

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There are 5 strands in J sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	269	282	first strand
Strand 2	C	211	224	anti-parallel
Strand 3	C	306	313	anti-parallel
Strand 4	C	164	169	anti-parallel
Strand 5	C	194	196	anti-parallel

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There are 4 strands in K sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	251	262	first strand
Strand 2	C	234	245	anti-parallel
Strand 3	C	286	292	anti-parallel
Strand 4	C	181	182	anti-parallel

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There are 5 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	251	262	first strand
Strand 2	C	234	245	anti-parallel
Strand 3	C	286	292	anti-parallel
Strand 4	C	204	207	anti-parallel
Strand 5	C	198	201	anti-parallel

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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il

Analysis of interatomic Contacts of Structural Units in PDB entry: 1IQA

Analysis of interatomic Contacts of Structural Units in PDB entry:
1IQA