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

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 21IQ entry

There are 2 chains in PDB entry 21IQ (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
B	GLU 42	PHE 256
A	GLY 2	PHE 1014

There are 35 helices in PDB entry 21IQ. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	B	227	233	Right-handed alpha
Helix 2	AA2	B	244	246	Right-handed 310
Helix 3	AA3	A	3	19	Right-handed alpha
Helix 4	AA4	A	22	37	Right-handed alpha
Helix 5	AA5	A	39	43	Right-handed 310
Helix 6	AA6	A	81	87	Right-handed alpha
Helix 7	AA7	A	88	92	Right-handed 310
Helix 8	AA8	A	98	102	Right-handed alpha
Helix 9	AA9	A	123	134	Right-handed alpha
Helix 10	AB1	A	135	173	Right-handed alpha
Helix 11	AB2	A	177	187	Right-handed alpha
Helix 12	AB3	A	234	247	Right-handed alpha
Helix 13	AB4	A	255	259	Right-handed 310
Helix 14	AB5	A	260	265	Right-handed alpha
Helix 15	AB6	A	272	282	Right-handed alpha
Helix 16	AB7	A	287	293	Right-handed 310
Helix 17	AB8	A	302	325	Right-handed alpha
Helix 18	AB9	A	333	337	Right-handed 310
Helix 19	AC1	A	338	343	Right-handed alpha
Helix 20	AC2	A	372	377	Right-handed alpha
Helix 21	AC3	A	381	388	Right-handed alpha
Helix 22	AC4	A	396	401	Right-handed alpha
Helix 23	AC5	A	402	422	Right-handed alpha
Helix 24	AC6	A	430	441	Right-handed alpha
Helix 25	AC7	A	575	586	Right-handed alpha
Helix 26	AC8	A	601	612	Right-handed alpha
Helix 27	AC9	A	642	650	Right-handed alpha
Helix 28	AD1	A	704	717	Right-handed alpha
Helix 29	AD2	A	720	733	Right-handed alpha
Helix 30	AD3	A	734	735	Right-handed 310
Helix 31	AD4	A	736	741	Right-handed 310
Helix 32	AD5	A	784	786	Right-handed 310
Helix 33	AD6	A	894	909	Right-handed alpha
Helix 34	AD7	A	920	932	Right-handed alpha
Helix 35	AD8	A	945	949	Right-handed 310

There are 15 sheets in PDB entry 21IQ. 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,

There are 3 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	49	51	first strand
Strand 2	B	110	112	anti-parallel
Strand 3	B	103	104	anti-parallel

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There are 5 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	87	92	first strand
Strand 2	B	79	84	anti-parallel
Strand 3	B	63	67	anti-parallel
Strand 4	B	122	127	anti-parallel
Strand 5	B	135	140	anti-parallel

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There are 11 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	151	154	first strand
Strand 2	B	167	174	anti-parallel
Strand 3	B	216	224	anti-parallel
Strand 4	B	203	210	anti-parallel
Strand 5	A	770	774	parallel
Strand 6	A	758	764	anti-parallel
Strand 7	A	838	846	anti-parallel
Strand 8	A	876	884	anti-parallel
Strand 9	A	867	873	anti-parallel
Strand 10	A	934	941	anti-parallel
Strand 11	A	957	964	parallel

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There are 4 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	190	191	first strand
Strand 2	B	182	187	anti-parallel
Strand 3	B	235	242	anti-parallel
Strand 4	B	248	252	anti-parallel

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There are 3 strands in AA5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	75	80	first strand
Strand 2	A	51	55	anti-parallel
Strand 3	A	103	106	anti-parallel

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There are 3 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	59	60	first strand
Strand 2	A	68	71	anti-parallel
Strand 3	A	113	114	anti-parallel

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There are 4 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	195	201	first strand
Strand 2	A	204	213	anti-parallel
Strand 3	A	218	221	anti-parallel
Strand 4	A	229	232	anti-parallel

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There are 2 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	364	365	first strand
Strand 2	A	370	371	anti-parallel

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There are 3 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	454	457	first strand
Strand 2	A	464	470	anti-parallel
Strand 3	A	476	480	anti-parallel

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There are 2 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	490	492	first strand
Strand 2	A	499	504	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	A	506	510	first strand
Strand 2	A	513	517	anti-parallel

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There are 4 strands in AB3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	537	540	first strand
Strand 2	A	685	691	parallel
Strand 3	A	654	661	anti-parallel
Strand 4	A	593	600	anti-parallel

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There are 2 strands in AB4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	636	640	first strand
Strand 2	A	675	679	anti-parallel

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There are 2 strands in AB5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	788	789	first strand
Strand 2	A	797	798	anti-parallel

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There are 6 strands in AB6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	800	804	first strand
Strand 2	A	829	833	anti-parallel
Strand 3	A	856	859	parallel
Strand 4	A	971	981	anti-parallel
Strand 5	A	986	997	anti-parallel
Strand 6	A	1004	1012	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: 21IQ

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