Analysis of interatomic Contacts of Structural Units in PDB entry:
1W21

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 1W21 entry

There are 4 chains in PDB entry 1W21 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	ARG 88	GLU 476
B	ARG 1088	GLU 1476
C	ARG 2088	GLU 2476
D	ARG 3088	GLU 3476

There are 14 helices in PDB entry 1W21. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	110	116	Right-handed alpha
Helix 2	2	A	148	152	Right-handed 310
Helix 3	3	A	471	476	Right-handed 310
Helix 4	4	B	1110	1116	Right-handed alpha
Helix 5	5	B	1148	1152	Right-handed 310
Helix 6	6	B	1204	1207	Right-handed 310
Helix 7	7	B	1471	1476	Right-handed 310
Helix 8	8	C	2110	2116	Right-handed alpha
Helix 9	9	C	2148	2152	Right-handed 310
Helix 10	10	C	2204	2207	Right-handed 310
Helix 11	11	C	2471	2476	Right-handed 310
Helix 12	12	D	3110	3116	Right-handed alpha
Helix 13	13	D	3148	3152	Right-handed 310
Helix 14	14	D	3471	3476	Right-handed 310

There are 24 sheets in PDB entry 1W21. Click on sheet of interest to get list of strands forming it: AA, AB, AC, AD, AE, AF, BA, BB, BC, BD, BE, BF, CA, CB, CC, CD, CE, CF, A, DB, C, DD, DE, DF,

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	102	108	first strand
Strand 2	A	447	457	anti-parallel
Strand 3	A	428	437	anti-parallel
Strand 4	A	413	417	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	121	131	first strand
Strand 2	A	134	145	anti-parallel
Strand 3	A	163	168	anti-parallel
Strand 4	A	179	183	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	186	191	first strand
Strand 2	A	196	202	anti-parallel
Strand 3	A	209	214	anti-parallel
Strand 4	A	217	223	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	243	250	first strand
Strand 2	A	258	265	anti-parallel
Strand 3	A	268	274	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	283	290	first strand
Strand 2	A	293	299	anti-parallel
Strand 3	A	308	313	anti-parallel
Strand 4	A	318	323	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	360	361	first strand
Strand 2	A	368	371	anti-parallel
Strand 3	A	379	385	anti-parallel
Strand 4	A	399	409	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1102	1108	first strand
Strand 2	B	1447	1457	anti-parallel
Strand 3	B	1428	1437	anti-parallel
Strand 4	B	1413	1417	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1121	1130	first strand
Strand 2	B	1135	1145	anti-parallel
Strand 3	B	1163	1168	anti-parallel
Strand 4	B	1179	1183	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1186	1191	first strand
Strand 2	B	1196	1202	anti-parallel
Strand 3	B	1209	1214	anti-parallel
Strand 4	B	1217	1223	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1244	1250	first strand
Strand 2	B	1258	1265	anti-parallel
Strand 3	B	1268	1274	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1283	1290	first strand
Strand 2	B	1293	1299	anti-parallel
Strand 3	B	1308	1313	anti-parallel
Strand 4	B	1318	1323	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	1360	1361	first strand
Strand 2	B	1368	1371	anti-parallel
Strand 3	B	1379	1385	anti-parallel
Strand 4	B	1399	1409	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2102	2108	first strand
Strand 2	C	2447	2457	anti-parallel
Strand 3	C	2428	2437	anti-parallel
Strand 4	C	2413	2417	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2121	2131	first strand
Strand 2	C	2134	2145	anti-parallel
Strand 3	C	2163	2168	anti-parallel
Strand 4	C	2179	2183	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2186	2191	first strand
Strand 2	C	2196	2202	anti-parallel
Strand 3	C	2209	2214	anti-parallel
Strand 4	C	2217	2223	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2231	2232	first strand
Strand 2	C	2244	2250	anti-parallel
Strand 3	C	2258	2265	anti-parallel
Strand 4	C	2268	2274	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2283	2290	first strand
Strand 2	C	2293	2299	anti-parallel
Strand 3	C	2308	2313	anti-parallel
Strand 4	C	2318	2323	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2360	2361	first strand
Strand 2	C	2368	2371	anti-parallel
Strand 3	C	2379	2385	anti-parallel
Strand 4	C	2399	2409	anti-parallel

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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	D	3102	3108	first strand
Strand 2	D	3447	3457	anti-parallel
Strand 3	D	3428	3437	anti-parallel
Strand 4	D	3413	3417	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3121	3131	first strand
Strand 2	D	3134	3145	anti-parallel
Strand 3	D	3163	3168	anti-parallel
Strand 4	D	3179	3183	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3186	3191	first strand
Strand 2	D	3196	3202	anti-parallel
Strand 3	D	3209	3214	anti-parallel
Strand 4	D	3217	3223	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3244	3250	first strand
Strand 2	D	3258	3265	anti-parallel
Strand 3	D	3268	3274	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3283	3290	first strand
Strand 2	D	3293	3299	anti-parallel
Strand 3	D	3308	3313	anti-parallel
Strand 4	D	3318	3323	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3360	3361	first strand
Strand 2	D	3368	3371	anti-parallel
Strand 3	D	3379	3385	anti-parallel
Strand 4	D	3399	3409	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: 1W21

Analysis of interatomic Contacts of Structural Units in PDB entry:
1W21