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

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 1SKQ entry

There are 2 chains in PDB entry 1SKQ (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	LYS 4	ALA 430
B	LYS 4	ALA 430

There are 24 helices in PDB entry 1SKQ. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	18	31	Right-handed alpha
Helix 2	2	A	34	49	Right-handed alpha
Helix 3	3	A	52	65	Right-handed alpha
Helix 4	4	A	96	104	Right-handed alpha
Helix 5	5	A	120	127	Right-handed alpha
Helix 6	6	A	130	142	Right-handed alpha
Helix 7	7	A	153	157	Right-handed 310
Helix 8	8	A	162	180	Right-handed alpha
Helix 9	9	A	214	221	Right-handed alpha
Helix 10	10	A	227	231	Right-handed 310
Helix 11	11	A	303	307	Right-handed 310
Helix 12	12	A	404	407	Right-handed 310
Helix 13	13	B	18	31	Right-handed alpha
Helix 14	14	B	36	48	Right-handed alpha
Helix 15	15	B	52	64	Right-handed alpha
Helix 16	16	B	96	104	Right-handed alpha
Helix 17	17	B	120	126	Right-handed alpha
Helix 18	18	B	130	142	Right-handed alpha
Helix 19	19	B	153	157	Right-handed 310
Helix 20	20	B	162	180	Right-handed alpha
Helix 21	21	B	214	221	Right-handed alpha
Helix 22	22	B	227	231	Right-handed 310
Helix 23	23	B	303	307	Right-handed 310
Helix 24	24	B	404	407	Right-handed 310

There are 11 sheets in PDB entry 1SKQ. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K,

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	78	80	first strand
Strand 2	A	85	88	anti-parallel
Strand 3	A	6	13	parallel
Strand 4	A	110	116	parallel
Strand 5	A	148	152	parallel
Strand 6	A	188	191	parallel

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There are 8 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	285	286	first strand
Strand 2	A	272	280	anti-parallel
Strand 3	A	294	300	anti-parallel
Strand 4	A	247	253	anti-parallel
Strand 5	A	235	243	anti-parallel
Strand 6	A	312	314	anti-parallel
Strand 7	A	264	268	anti-parallel
Strand 8	A	272	280	anti-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	A	259	260	first strand
Strand 2	A	288	289	anti-parallel

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There are 7 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	372	375	first strand
Strand 2	A	352	365	anti-parallel
Strand 3	A	346	349	anti-parallel
Strand 4	A	409	414	anti-parallel
Strand 5	A	417	429	anti-parallel
Strand 6	A	322	332	anti-parallel
Strand 7	A	396	397	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	A	372	375	first strand
Strand 2	A	352	365	anti-parallel
Strand 3	A	385	392	anti-parallel
Strand 4	A	322	332	anti-parallel
Strand 5	A	396	397	anti-parallel

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There are 2 strands in F sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	339	340	first strand
Strand 2	A	379	380	anti-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	78	80	first strand
Strand 2	B	85	90	anti-parallel
Strand 3	B	6	12	parallel
Strand 4	B	110	116	parallel
Strand 5	B	147	152	parallel
Strand 6	B	187	191	parallel

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There are 8 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	284	286	first strand
Strand 2	B	272	281	anti-parallel
Strand 3	B	294	300	anti-parallel
Strand 4	B	247	253	anti-parallel
Strand 5	B	235	243	anti-parallel
Strand 6	B	312	314	anti-parallel
Strand 7	B	264	268	anti-parallel
Strand 8	B	272	281	anti-parallel

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There are 2 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	259	260	first strand
Strand 2	B	288	289	anti-parallel

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There are 7 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	372	375	first strand
Strand 2	B	352	365	anti-parallel
Strand 3	B	346	349	anti-parallel
Strand 4	B	409	414	anti-parallel
Strand 5	B	417	429	anti-parallel
Strand 6	B	322	332	anti-parallel
Strand 7	B	396	397	anti-parallel

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There are 5 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	372	375	first strand
Strand 2	B	352	365	anti-parallel
Strand 3	B	385	392	anti-parallel
Strand 4	B	322	332	anti-parallel
Strand 5	B	396	397	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: 1SKQ

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