Analysis of interatomic Contacts of Structural Units in PDB entry:
1K25

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 1K25 entry

There are 4 chains in PDB entry 1K25 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLN 67	ASP 750
B	HIS 1066	GLY 1749
C	GLN 2067	ASP 2750
D	HIS 3066	GLY 3749

There are 61 helices in PDB entry 1K25. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	194	199	Right-handed alpha
Helix 2	2	A	218	223	Right-handed alpha
Helix 3	3	A	223	229	Right-handed alpha
Helix 4	4	A	266	285	Right-handed alpha
Helix 5	5	A	338	349	Right-handed alpha
Helix 6	6	A	357	364	Right-handed 310
Helix 7	7	A	399	419	Right-handed alpha
Helix 8	8	A	441	448	Right-handed alpha
Helix 9	9	A	457	470	Right-handed alpha
Helix 10	10	A	504	516	Right-handed alpha
Helix 11	11	A	596	615	Right-handed alpha
Helix 12	12	A	624	629	Right-handed alpha
Helix 13	13	A	645	655	Right-handed alpha
Helix 14	14	A	703	714	Right-handed alpha
Helix 15	15	A	737	741	Right-handed 310
Helix 16	16	B	1152	1156	Right-handed 310
Helix 17	17	B	1159	1171	Right-handed alpha
Helix 18	18	B	1194	1199	Right-handed alpha
Helix 19	19	B	1218	1223	Right-handed alpha
Helix 20	20	B	1223	1229	Right-handed alpha
Helix 21	21	B	1266	1285	Right-handed alpha
Helix 22	22	B	1335	1338	Right-handed 310
Helix 23	23	B	1339	1351	Right-handed alpha
Helix 24	24	B	1397	1408	Right-handed alpha
Helix 25	25	B	1408	1418	Right-handed alpha
Helix 26	26	B	1443	1448	Right-handed alpha
Helix 27	27	B	1457	1468	Right-handed alpha
Helix 28	28	B	1504	1517	Right-handed alpha
Helix 29	29	B	1598	1615	Right-handed alpha
Helix 30	30	B	1623	1627	Right-handed 310
Helix 31	31	B	1645	1656	Right-handed alpha
Helix 32	32	B	1703	1715	Right-handed alpha
Helix 33	33	B	1737	1741	Right-handed 310
Helix 34	34	C	2194	2199	Right-handed alpha
Helix 35	35	C	2218	2223	Right-handed alpha
Helix 36	36	C	2223	2228	Right-handed alpha
Helix 37	37	C	2266	2285	Right-handed alpha
Helix 38	38	C	2335	2339	Right-handed 310
Helix 39	39	C	2340	2350	Right-handed alpha
Helix 40	40	C	2399	2408	Right-handed alpha
Helix 41	41	C	2408	2419	Right-handed alpha
Helix 42	42	C	2441	2448	Right-handed alpha
Helix 43	43	C	2457	2469	Right-handed alpha
Helix 44	44	C	2504	2521	Right-handed alpha
Helix 45	45	C	2596	2613	Right-handed alpha
Helix 46	46	C	2645	2655	Right-handed alpha
Helix 47	47	C	2703	2714	Right-handed alpha
Helix 48	48	D	3159	3164	Right-handed alpha
Helix 49	49	D	3164	3173	Right-handed alpha
Helix 50	50	D	3194	3199	Right-handed alpha
Helix 51	51	D	3217	3223	Right-handed alpha
Helix 52	52	D	3266	3285	Right-handed alpha
Helix 53	53	D	3339	3350	Right-handed alpha
Helix 54	54	D	3397	3408	Right-handed alpha
Helix 55	55	D	3408	3419	Right-handed alpha
Helix 56	56	D	3441	3449	Right-handed alpha
Helix 57	57	D	3457	3470	Right-handed alpha
Helix 58	58	D	3504	3517	Right-handed alpha
Helix 59	59	D	3596	3611	Right-handed alpha
Helix 60	60	D	3645	3656	Right-handed alpha
Helix 61	61	D	3704	3714	Right-handed alpha

There are 39 sheets in PDB entry 1K25. 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, U, V, W, X, Y, Z, AA, AB, AC, AD, AE, AF, AG, AH, AI, AJ, AK, AL, AM,

There are 2 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	68	72	first strand
Strand 2	A	232	236	anti-parallel

Back to list of sheets
Back to top of page

There are 5 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	186	187	first strand
Strand 2	A	86	90	anti-parallel
Strand 3	A	79	80	anti-parallel
Strand 4	A	261	263	parallel
Strand 5	A	480	483	anti-parallel

Back to list of sheets
Back to top of page

There are 2 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	93	94	first strand
Strand 2	A	182	183	anti-parallel

Back to list of sheets
Back to top of page

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	200	205	first strand
Strand 2	A	211	217	anti-parallel

Back to list of sheets
Back to top of page

There are 5 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	300	307	first strand
Strand 2	A	286	295	anti-parallel
Strand 3	A	583	592	anti-parallel
Strand 4	A	569	576	anti-parallel
Strand 5	A	545	549	anti-parallel

Back to list of sheets
Back to top of page

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	474	475	first strand
Strand 2	A	498	500	anti-parallel

Back to list of sheets
Back to top of page

There are 3 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	659	663	first strand
Strand 2	A	685	690	parallel
Strand 3	A	669	672	anti-parallel

Back to list of sheets
Back to top of page

There are 3 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	717	723	first strand
Strand 2	A	743	749	parallel
Strand 3	A	726	730	anti-parallel

Back to list of sheets
Back to top of page

There are 3 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	1079	1080	first strand
Strand 2	B	1086	1090	anti-parallel
Strand 3	B	1186	1187	anti-parallel

Back to list of sheets
Back to top of page

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	B	1096	1097	first strand
Strand 2	B	1179	1180	anti-parallel

Back to list of sheets
Back to top of page

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	1200	1205	first strand
Strand 2	B	1211	1217	anti-parallel

Back to list of sheets
Back to top of page

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	1233	1235	first strand
Strand 2	B	1250	1253	anti-parallel

Back to list of sheets
Back to top of page

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	1260	1263	first strand
Strand 2	B	1480	1484	anti-parallel

Back to list of sheets
Back to top of page

There are 5 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	1301	1307	first strand
Strand 2	B	1286	1295	anti-parallel
Strand 3	B	1583	1592	anti-parallel
Strand 4	B	1569	1576	anti-parallel
Strand 5	B	1545	1547	anti-parallel

Back to list of sheets
Back to top of page

There are 5 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	1301	1307	first strand
Strand 2	B	1286	1295	anti-parallel
Strand 3	B	1583	1592	anti-parallel
Strand 4	B	1569	1576	anti-parallel
Strand 5	B	1550	1551	anti-parallel

Back to list of sheets
Back to top of page

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	1636	1637	first strand
Strand 2	B	1679	1680	anti-parallel

Back to list of sheets
Back to top of page

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	B	1659	1663	first strand
Strand 2	B	1685	1690	parallel
Strand 3	B	1669	1671	anti-parallel

Back to list of sheets
Back to top of page

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	B	1717	1721	first strand
Strand 2	B	1743	1749	parallel
Strand 3	B	1726	1730	anti-parallel

Back to list of sheets
Back to top of page

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	C	2071	2072	first strand
Strand 2	C	2232	2233	anti-parallel

Back to list of sheets
Back to top of page

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	C	2089	2090	first strand
Strand 2	C	2186	2187	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2200	2205	first strand
Strand 2	C	2211	2217	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2229	2230	first strand
Strand 2	C	2256	2257	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2260	2263	first strand
Strand 2	C	2480	2484	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2305	2307	first strand
Strand 2	C	2288	2295	anti-parallel
Strand 3	C	2583	2590	anti-parallel
Strand 4	C	2569	2576	anti-parallel
Strand 5	C	2545	2551	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2474	2475	first strand
Strand 2	C	2498	2500	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2659	2661	first strand
Strand 2	C	2685	2687	parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2717	2718	first strand
Strand 2	C	2743	2744	parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2721	2722	first strand
Strand 2	C	2746	2749	parallel
Strand 3	C	2726	2730	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3070	3072	first strand
Strand 2	D	3232	3234	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3086	3088	first strand
Strand 2	D	3079	3080	anti-parallel
Strand 3	D	3260	3263	parallel
Strand 4	D	3480	3485	anti-parallel
Strand 5	D	3490	3493	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3093	3097	first strand
Strand 2	D	3179	3183	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3201	3205	first strand
Strand 2	D	3211	3215	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3301	3306	first strand
Strand 2	D	3288	3295	anti-parallel
Strand 3	D	3583	3590	anti-parallel
Strand 4	D	3569	3576	anti-parallel
Strand 5	D	3545	3547	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3301	3306	first strand
Strand 2	D	3288	3295	anti-parallel
Strand 3	D	3583	3590	anti-parallel
Strand 4	D	3569	3576	anti-parallel
Strand 5	D	3550	3551	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3474	3475	first strand
Strand 2	D	3498	3500	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3553	3554	first strand
Strand 2	D	3561	3562	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3636	3637	first strand
Strand 2	D	3679	3680	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3659	3663	first strand
Strand 2	D	3685	3690	parallel
Strand 3	D	3669	3672	anti-parallel

Back to list of sheets
Back to top of page

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	3701	3703	first strand
Strand 2	D	3726	3730	anti-parallel
Strand 3	D	3743	3749	anti-parallel
Strand 4	D	3717	3722	parallel

Back to list of sheets
Back to top of page

Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il

Analysis of interatomic Contacts of Structural Units in PDB entry: 1K25

Analysis of interatomic Contacts of Structural Units in PDB entry:
1K25