Analysis of interatomic Contacts of Structural Units in PDB entry:
21CO

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 21CO entry

There are 3 chains in PDB entry 21CO (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLN 541	LEU 563
B	GLY 51	LEU 563
C	GLY 51	ASP 540

There are 25 helices in PDB entry 21CO. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	B	98	100	Right-handed 310
Helix 2	AA2	B	142	149	Right-handed alpha
Helix 3	AA3	B	158	161	Right-handed 310
Helix 4	AA4	B	168	173	Right-handed alpha
Helix 5	AA5	B	175	179	Right-handed 310
Helix 6	AA6	B	185	188	Right-handed 310
Helix 7	AA7	B	218	225	Right-handed alpha
Helix 8	AA8	B	315	318	Right-handed 310
Helix 9	AA9	B	322	327	Right-handed 310
Helix 10	AB1	B	348	359	Right-handed alpha
Helix 11	AB2	B	399	402	Right-handed 310
Helix 12	AB3	B	435	440	Right-handed alpha
Helix 13	AB4	B	441	445	Right-handed 310
Helix 14	AB5	C	97	101	Right-handed alpha
Helix 15	AB6	C	142	148	Right-handed alpha
Helix 16	AB7	C	155	160	Right-handed alpha
Helix 17	AB8	C	175	179	Right-handed 310
Helix 18	AB9	C	185	188	Right-handed 310
Helix 19	AC1	C	218	225	Right-handed alpha
Helix 20	AC2	C	311	316	Right-handed alpha
Helix 21	AC3	C	317	319	Right-handed 310
Helix 22	AC4	C	322	327	Right-handed 310
Helix 23	AC5	C	348	359	Right-handed alpha
Helix 24	AC6	C	382	386	Right-handed 310
Helix 25	AC7	C	435	440	Right-handed alpha

There are 19 sheets in PDB entry 21CO. Click on sheet of interest to get list of strands forming it: AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, AA9, AB1, AB2, AB3, AB4, AB5, AB6, AB7, AB8, AB9, AC1,

There are 2 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	544	545	first strand
Strand 2	B	121	122	anti-parallel

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There are 8 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	90	91	first strand
Strand 2	B	75	82	anti-parallel
Strand 3	B	130	137	anti-parallel
Strand 4	B	202	204	anti-parallel
Strand 5	B	232	236	anti-parallel
Strand 6	A	549	551	parallel
Strand 7	B	113	114	anti-parallel
Strand 8	B	105	106	anti-parallel

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There are 4 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	95	96	first strand
Strand 2	B	75	82	anti-parallel
Strand 3	B	130	137	anti-parallel
Strand 4	B	211	212	anti-parallel

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There are 5 strands in AA4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	63	67	first strand
Strand 2	A	554	561	anti-parallel
Strand 3	B	488	491	parallel
Strand 4	B	239	245	parallel
Strand 5	B	363	365	anti-parallel

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There are 2 strands in AA5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	163	165	first strand
Strand 2	B	283	285	anti-parallel

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There are 2 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	190	193	first strand
Strand 2	B	197	200	anti-parallel

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There are 3 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	250	253	first strand
Strand 2	B	266	278	anti-parallel
Strand 3	B	339	340	anti-parallel

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There are 4 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	250	253	first strand
Strand 2	B	266	278	anti-parallel
Strand 3	B	388	397	anti-parallel
Strand 4	B	459	465	anti-parallel

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There are 2 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	280	281	first strand
Strand 2	B	320	321	anti-parallel

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There are 3 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	432	433	first strand
Strand 2	B	424	427	anti-parallel
Strand 3	B	452	455	anti-parallel

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There are 2 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	544	545	first strand
Strand 2	C	121	122	anti-parallel

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There are 8 strands in AB3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	90	96	first strand
Strand 2	C	75	82	anti-parallel
Strand 3	C	130	137	anti-parallel
Strand 4	C	202	206	anti-parallel
Strand 5	C	232	236	anti-parallel
Strand 6	B	549	551	parallel
Strand 7	C	113	114	anti-parallel
Strand 8	C	105	106	anti-parallel

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There are 4 strands in AB4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	90	96	first strand
Strand 2	C	75	82	anti-parallel
Strand 3	C	130	137	anti-parallel
Strand 4	C	211	212	anti-parallel

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There are 5 strands in AB5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	63	65	first strand
Strand 2	B	556	561	anti-parallel
Strand 3	C	488	491	parallel
Strand 4	C	239	245	parallel
Strand 5	C	363	365	anti-parallel

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There are 2 strands in AB6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	163	165	first strand
Strand 2	C	283	285	anti-parallel

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There are 2 strands in AB7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	190	193	first strand
Strand 2	C	197	200	anti-parallel

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There are 3 strands in AB8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	250	253	first strand
Strand 2	C	266	278	anti-parallel
Strand 3	C	339	340	anti-parallel

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There are 4 strands in AB9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	250	253	first strand
Strand 2	C	266	278	anti-parallel
Strand 3	C	388	397	anti-parallel
Strand 4	C	459	465	anti-parallel

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There are 3 strands in AC1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	432	433	first strand
Strand 2	C	424	427	anti-parallel
Strand 3	C	452	455	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: 21CO

Analysis of interatomic Contacts of Structural Units in PDB entry:
21CO