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

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 1IHM entry

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

Chain ID	Initial residue	Terminal residue
A	ASP 1029	SER 1520
B	SER 2010	SER 2520
C	ASP 3029	SER 3520

There are 29 helices in PDB entry 1IHM. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	1041	1045	Right-handed 310
Helix 2	2	A	1086	1089	Right-handed 310
Helix 3	3	A	1090	1098	Right-handed alpha
Helix 4	4	A	1138	1143	Right-handed alpha
Helix 5	5	A	1237	1241	Right-handed 310
Helix 6	6	A	1283	1287	Right-handed 310
Helix 7	7	A	1353	1356	Right-handed 310
Helix 8	8	A	1438	1448	Right-handed alpha
Helix 9	9	A	1491	1495	Right-handed 310
Helix 10	10	B	2013	2017	Right-handed 310
Helix 11	11	B	2038	2045	Right-handed 310
Helix 12	12	B	2086	2089	Right-handed 310
Helix 13	13	B	2090	2098	Right-handed alpha
Helix 14	14	B	2138	2143	Right-handed alpha
Helix 15	15	B	2237	2241	Right-handed 310
Helix 16	16	B	2283	2287	Right-handed 310
Helix 17	17	B	2353	2356	Right-handed 310
Helix 18	18	B	2438	2448	Right-handed alpha
Helix 19	19	B	2491	2495	Right-handed 310
Helix 20	20	C	3038	3042	Right-handed 310
Helix 21	21	C	3053	3058	Right-handed alpha
Helix 22	22	C	3086	3089	Right-handed 310
Helix 23	23	C	3090	3098	Right-handed alpha
Helix 24	24	C	3138	3144	Right-handed alpha
Helix 25	25	C	3237	3241	Right-handed 310
Helix 26	26	C	3283	3287	Right-handed 310
Helix 27	27	C	3353	3356	Right-handed 310
Helix 28	28	C	3438	3448	Right-handed alpha
Helix 29	29	C	3491	3495	Right-handed 310

There are 20 sheets in PDB entry 1IHM. 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 4 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	1061	1070	first strand
Strand 2	A	1202	1210	anti-parallel
Strand 3	A	1107	1114	anti-parallel
Strand 4	A	1158	1162	anti-parallel

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There are 4 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	1079	1084	first strand
Strand 2	A	1181	1186	anti-parallel
Strand 3	A	1122	1128	anti-parallel
Strand 4	A	1147	1151	anti-parallel

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There are 3 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	1171	1172	first strand
Strand 2	A	1102	1104	anti-parallel
Strand 3	A	1215	1216	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	1119	1120	first strand
Strand 2	A	1191	1192	anti-parallel

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There are 3 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	1252	1255	first strand
Strand 2	A	1417	1425	anti-parallel
Strand 3	A	1431	1435	anti-parallel

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There are 6 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	1252	1255	first strand
Strand 2	A	1417	1425	anti-parallel
Strand 3	A	1480	1483	anti-parallel
Strand 4	A	1469	1476	anti-parallel
Strand 5	A	1456	1462	anti-parallel
Strand 6	A	1500	1507	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	A	1341	1344	first strand
Strand 2	A	1327	1333	anti-parallel
Strand 3	A	1366	1377	anti-parallel
Strand 4	A	1289	1295	anti-parallel
Strand 5	A	1298	1302	anti-parallel
Strand 6	A	1358	1360	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	2011	2012	first strand
Strand 2	C	3147	3151	parallel
Strand 3	C	3122	3128	anti-parallel
Strand 4	C	3181	3186	anti-parallel
Strand 5	C	3079	3084	anti-parallel

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There are 4 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	2061	2070	first strand
Strand 2	B	2202	2210	anti-parallel
Strand 3	B	2107	2112	anti-parallel
Strand 4	B	2158	2162	anti-parallel

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There are 4 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	2079	2084	first strand
Strand 2	B	2181	2186	anti-parallel
Strand 3	B	2122	2128	anti-parallel
Strand 4	B	2147	2151	anti-parallel

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There are 2 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	2100	2104	first strand
Strand 2	B	2215	2219	anti-parallel

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There are 2 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	2119	2120	first strand
Strand 2	B	2191	2192	anti-parallel

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There are 3 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	2252	2255	first strand
Strand 2	B	2417	2425	anti-parallel
Strand 3	B	2431	2435	anti-parallel

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There are 6 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	2252	2255	first strand
Strand 2	B	2417	2425	anti-parallel
Strand 3	B	2480	2483	anti-parallel
Strand 4	B	2469	2476	anti-parallel
Strand 5	B	2456	2462	anti-parallel
Strand 6	B	2500	2507	anti-parallel

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There are 6 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	2341	2344	first strand
Strand 2	B	2327	2333	anti-parallel
Strand 3	B	2367	2377	anti-parallel
Strand 4	B	2289	2294	anti-parallel
Strand 5	B	2299	2302	anti-parallel
Strand 6	B	2358	2359	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	3061	3070	first strand
Strand 2	C	3202	3210	anti-parallel
Strand 3	C	3107	3114	anti-parallel
Strand 4	C	3158	3162	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	3171	3172	first strand
Strand 2	C	3102	3104	anti-parallel
Strand 3	C	3215	3216	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	3252	3255	first strand
Strand 2	C	3417	3424	anti-parallel
Strand 3	C	3432	3433	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	3252	3255	first strand
Strand 2	C	3417	3424	anti-parallel
Strand 3	C	3480	3483	anti-parallel
Strand 4	C	3468	3476	anti-parallel
Strand 5	C	3456	3463	anti-parallel
Strand 6	C	3500	3507	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	3337	3344	first strand
Strand 2	C	3329	3334	anti-parallel
Strand 3	C	3367	3375	anti-parallel
Strand 4	C	3289	3294	anti-parallel
Strand 5	C	3298	3302	anti-parallel
Strand 6	C	3358	3360	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: 1IHM

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