Analysis of interatomic Contacts of Structural Units in PDB entry:
3A21

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 3A21 entry

There are 2 chains in PDB entry 3A21 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	ALA 45	THR 658
B	THR 47	THR 658

There are 44 helices in PDB entry 3A21. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	62	67	Right-handed alpha
Helix 2	2	A	71	85	Right-handed alpha
Helix 3	3	A	86	91	Right-handed alpha
Helix 4	4	A	122	133	Right-handed alpha
Helix 5	5	A	147	152	Right-handed alpha
Helix 6	6	A	167	179	Right-handed alpha
Helix 7	7	A	187	194	Right-handed alpha
Helix 8	8	A	196	216	Right-handed alpha
Helix 9	9	A	230	234	Right-handed 310
Helix 10	10	A	256	268	Right-handed alpha
Helix 11	11	A	292	307	Right-handed alpha
Helix 12	12	A	315	319	Right-handed 310
Helix 13	13	A	320	328	Right-handed alpha
Helix 14	14	A	329	337	Right-handed alpha
Helix 15	15	A	385	389	Right-handed alpha
Helix 16	16	A	528	531	Right-handed 310
Helix 17	17	A	546	550	Right-handed 310
Helix 18	18	A	565	569	Right-handed 310
Helix 19	19	A	590	592	Right-handed 310
Helix 20	20	A	607	610	Right-handed 310
Helix 21	21	A	633	635	Right-handed 310
Helix 22	22	A	650	653	Right-handed 310
Helix 23	23	B	62	67	Right-handed alpha
Helix 24	24	B	71	85	Right-handed alpha
Helix 25	25	B	87	91	Right-handed 310
Helix 26	26	B	122	133	Right-handed alpha
Helix 27	27	B	147	152	Right-handed alpha
Helix 28	28	B	167	179	Right-handed alpha
Helix 29	29	B	187	194	Right-handed alpha
Helix 30	30	B	196	216	Right-handed alpha
Helix 31	31	B	230	234	Right-handed 310
Helix 32	32	B	256	268	Right-handed alpha
Helix 33	33	B	292	307	Right-handed alpha
Helix 34	34	B	315	319	Right-handed 310
Helix 35	35	B	320	329	Right-handed alpha
Helix 36	36	B	329	337	Right-handed alpha
Helix 37	37	B	386	389	Right-handed 310
Helix 38	38	B	528	531	Right-handed 310
Helix 39	39	B	546	550	Right-handed 310
Helix 40	40	B	565	569	Right-handed 310
Helix 41	41	B	590	592	Right-handed 310
Helix 42	42	B	607	610	Right-handed 310
Helix 43	43	B	633	635	Right-handed 310
Helix 44	44	B	650	653	Right-handed 310

There are 20 sheets in PDB entry 3A21. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T,

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	49	50	first strand
Strand 2	A	495	503	parallel
Strand 3	A	455	463	anti-parallel
Strand 4	A	519	526	anti-parallel
Strand 5	A	436	438	anti-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	278	280	first strand
Strand 2	A	241	243	parallel
Strand 3	A	220	223	parallel
Strand 4	A	182	186	parallel
Strand 5	A	136	142	parallel
Strand 6	A	94	96	parallel
Strand 7	A	58	61	parallel
Strand 8	A	310	312	parallel

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There are 6 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	345	351	first strand
Strand 2	A	354	360	anti-parallel
Strand 3	A	367	373	anti-parallel
Strand 4	A	422	428	anti-parallel
Strand 5	A	395	399	anti-parallel
Strand 6	A	404	409	anti-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	A	379	384	first strand
Strand 2	A	412	417	anti-parallel

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There are 4 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	445	451	first strand
Strand 2	A	506	514	anti-parallel
Strand 3	A	471	477	anti-parallel
Strand 4	A	483	487	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	536	537	first strand
Strand 2	A	655	656	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	543	545	first strand
Strand 2	A	558	560	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	571	572	first strand
Strand 2	A	578	580	anti-parallel
Strand 3	A	584	588	anti-parallel
Strand 4	A	599	603	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	A	612	614	first strand
Strand 2	A	620	622	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	628	631	first strand
Strand 2	A	642	645	anti-parallel

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There are 8 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	278	280	first strand
Strand 2	B	241	243	parallel
Strand 3	B	220	223	parallel
Strand 4	B	182	186	parallel
Strand 5	B	136	142	parallel
Strand 6	B	94	96	parallel
Strand 7	B	58	61	parallel
Strand 8	B	310	312	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	345	351	first strand
Strand 2	B	354	360	anti-parallel
Strand 3	B	367	373	anti-parallel
Strand 4	B	422	428	anti-parallel
Strand 5	B	395	399	anti-parallel
Strand 6	B	404	409	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	379	384	first strand
Strand 2	B	412	417	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	436	438	first strand
Strand 2	B	519	526	anti-parallel
Strand 3	B	455	463	anti-parallel
Strand 4	B	495	503	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	445	451	first strand
Strand 2	B	506	514	anti-parallel
Strand 3	B	471	477	anti-parallel
Strand 4	B	483	487	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	536	537	first strand
Strand 2	B	655	656	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	543	545	first strand
Strand 2	B	558	560	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	571	572	first strand
Strand 2	B	578	580	anti-parallel
Strand 3	B	584	588	anti-parallel
Strand 4	B	599	603	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	612	614	first strand
Strand 2	B	620	622	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	628	631	first strand
Strand 2	B	642	645	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: 3A21

Analysis of interatomic Contacts of Structural Units in PDB entry:
3A21