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

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 21EN entry

There are 6 chains in PDB entry 21EN (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	MET 1	LYS 232
B	MET 1	LYS 232
C	MET 1	LYS 232
D	MET 1	GLN 153
E	MET 1	GLN 153
F	MET 1	GLN 153

There are 18 helices in PDB entry 21EN. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	A	29	33	Right-handed 310
Helix 2	AA2	A	63	66	Right-handed 310
Helix 3	AA3	A	75	77	Right-handed 310
Helix 4	AA4	A	88	92	Right-handed 310
Helix 5	AA5	A	204	208	Right-handed 310
Helix 6	AA6	B	29	33	Right-handed 310
Helix 7	AA7	B	63	66	Right-handed 310
Helix 8	AA8	B	75	77	Right-handed 310
Helix 9	AA9	B	88	92	Right-handed 310
Helix 10	AB1	B	204	208	Right-handed 310
Helix 11	AB2	C	29	33	Right-handed 310
Helix 12	AB3	C	63	66	Right-handed 310
Helix 13	AB4	C	75	77	Right-handed 310
Helix 14	AB5	C	88	92	Right-handed 310
Helix 15	AB6	C	204	208	Right-handed 310
Helix 16	AB7	D	131	136	Right-handed alpha
Helix 17	AB8	E	131	136	Right-handed alpha
Helix 18	AB9	F	131	136	Right-handed alpha

There are 24 sheets in PDB entry 21EN. 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, AB7, AB8, AB9, AC1, AC2, AC3, AC4, AC5, AC6,

There are 4 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	4	7	first strand
Strand 2	A	19	26	anti-parallel
Strand 3	A	79	84	anti-parallel
Strand 4	A	69	74	anti-parallel

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There are 6 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	11	13	first strand
Strand 2	A	119	123	parallel
Strand 3	A	93	100	anti-parallel
Strand 4	A	35	40	anti-parallel
Strand 5	A	46	52	anti-parallel
Strand 6	A	59	61	anti-parallel

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There are 4 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	11	13	first strand
Strand 2	A	119	123	parallel
Strand 3	A	93	100	anti-parallel
Strand 4	A	112	115	anti-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	A	129	130	first strand
Strand 2	A	144	150	anti-parallel
Strand 3	A	195	200	anti-parallel
Strand 4	A	187	192	anti-parallel

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There are 6 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	135	138	first strand
Strand 2	A	227	231	parallel
Strand 3	A	210	215	anti-parallel
Strand 4	A	158	163	anti-parallel
Strand 5	A	170	174	anti-parallel
Strand 6	A	178	179	anti-parallel

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There are 4 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	135	138	first strand
Strand 2	A	227	231	parallel
Strand 3	A	210	215	anti-parallel
Strand 4	A	222	223	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	B	4	7	first strand
Strand 2	B	19	26	anti-parallel
Strand 3	B	79	84	anti-parallel
Strand 4	B	69	74	anti-parallel

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There are 6 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	11	13	first strand
Strand 2	B	119	123	parallel
Strand 3	B	93	100	anti-parallel
Strand 4	B	35	40	anti-parallel
Strand 5	B	46	52	anti-parallel
Strand 6	B	59	61	anti-parallel

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There are 4 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	11	13	first strand
Strand 2	B	119	123	parallel
Strand 3	B	93	100	anti-parallel
Strand 4	B	112	115	anti-parallel

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There are 4 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	129	130	first strand
Strand 2	B	144	150	anti-parallel
Strand 3	B	195	200	anti-parallel
Strand 4	B	187	192	anti-parallel

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There are 6 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	135	138	first strand
Strand 2	B	227	231	parallel
Strand 3	B	210	215	anti-parallel
Strand 4	B	158	163	anti-parallel
Strand 5	B	170	174	anti-parallel
Strand 6	B	178	179	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	B	135	138	first strand
Strand 2	B	227	231	parallel
Strand 3	B	210	215	anti-parallel
Strand 4	B	222	223	anti-parallel

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There are 4 strands in AB4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	4	7	first strand
Strand 2	C	19	26	anti-parallel
Strand 3	C	79	84	anti-parallel
Strand 4	C	69	74	anti-parallel

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There are 6 strands in AB5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	11	13	first strand
Strand 2	C	119	123	parallel
Strand 3	C	93	100	anti-parallel
Strand 4	C	35	40	anti-parallel
Strand 5	C	46	52	anti-parallel
Strand 6	C	59	61	anti-parallel

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There are 4 strands in AB6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	11	13	first strand
Strand 2	C	119	123	parallel
Strand 3	C	93	100	anti-parallel
Strand 4	C	112	115	anti-parallel

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There are 4 strands in AB7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	129	130	first strand
Strand 2	C	144	150	anti-parallel
Strand 3	C	195	200	anti-parallel
Strand 4	C	187	192	anti-parallel

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There are 6 strands in AB8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	135	138	first strand
Strand 2	C	227	231	parallel
Strand 3	C	210	215	anti-parallel
Strand 4	C	158	163	anti-parallel
Strand 5	C	170	174	anti-parallel
Strand 6	C	178	179	anti-parallel

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There are 4 strands in AB9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	135	138	first strand
Strand 2	C	227	231	parallel
Strand 3	C	210	215	anti-parallel
Strand 4	C	222	223	anti-parallel

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There are 5 strands in AC1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	94	101	first strand
Strand 2	D	29	36	anti-parallel
Strand 3	D	16	24	anti-parallel
Strand 4	D	2	10	anti-parallel
Strand 5	D	150	151	anti-parallel

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There are 4 strands in AC2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	83	89	first strand
Strand 2	D	41	47	anti-parallel
Strand 3	D	116	120	anti-parallel
Strand 4	D	143	148	anti-parallel

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There are 5 strands in AC3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	94	101	first strand
Strand 2	E	29	36	anti-parallel
Strand 3	E	16	24	anti-parallel
Strand 4	E	2	10	anti-parallel
Strand 5	E	150	151	anti-parallel

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There are 4 strands in AC4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	83	89	first strand
Strand 2	E	41	47	anti-parallel
Strand 3	E	116	120	anti-parallel
Strand 4	E	143	148	anti-parallel

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There are 5 strands in AC5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	94	101	first strand
Strand 2	F	29	36	anti-parallel
Strand 3	F	16	24	anti-parallel
Strand 4	F	2	10	anti-parallel
Strand 5	F	150	151	anti-parallel

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There are 4 strands in AC6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	83	89	first strand
Strand 2	F	41	47	anti-parallel
Strand 3	F	116	120	anti-parallel
Strand 4	F	143	148	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: 21EN

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