Analysis of interatomic Contacts of Structural Units in PDB entry:
2XTQ

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 2XTQ entry

There are 5 chains in PDB entry 2XTQ (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLU 2	ARG 271
B	GLU 2	ARG 271
C	GLU 2	ARG 271
D	GLU 2	ARG 271
E	GLU 2	TYR 224

There are112 helices in PDB entry 2XTQ. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	17	22	Right-handed 310
Helix 2	2	A	37	47	Right-handed alpha
Helix 3	3	A	48	66	Right-handed alpha
Helix 4	4	A	69	93	Right-handed alpha
Helix 5	5	A	97	104	Right-handed alpha
Helix 6	6	A	108	112	Right-handed 310
Helix 7	7	A	113	118	Right-handed alpha
Helix 8	8	A	127	139	Right-handed alpha
Helix 9	9	A	147	151	Right-handed 310
Helix 10	10	A	156	159	Right-handed 310
Helix 11	11	A	160	170	Right-handed alpha
Helix 12	12	A	186	188	Right-handed 310
Helix 13	13	A	189	196	Right-handed alpha
Helix 14	14	A	236	250	Right-handed alpha
Helix 15	15	B	17	22	Right-handed 310
Helix 16	16	B	37	47	Right-handed alpha
Helix 17	17	B	48	66	Right-handed alpha
Helix 18	18	B	69	93	Right-handed alpha
Helix 19	19	B	97	104	Right-handed alpha
Helix 20	20	B	108	112	Right-handed 310
Helix 21	21	B	113	118	Right-handed alpha
Helix 22	22	B	127	139	Right-handed alpha
Helix 23	23	B	147	151	Right-handed 310
Helix 24	24	B	156	159	Right-handed 310
Helix 25	25	B	160	170	Right-handed alpha
Helix 26	26	B	186	188	Right-handed 310
Helix 27	27	B	189	196	Right-handed alpha
Helix 28	28	B	236	250	Right-handed alpha
Helix 29	29	C	17	22	Right-handed 310
Helix 30	30	C	37	47	Right-handed alpha
Helix 31	31	C	48	66	Right-handed alpha
Helix 32	32	C	69	93	Right-handed alpha
Helix 33	33	C	97	104	Right-handed alpha
Helix 34	34	C	108	112	Right-handed 310
Helix 35	35	C	113	118	Right-handed alpha
Helix 36	36	C	127	139	Right-handed alpha
Helix 37	37	C	147	151	Right-handed 310
Helix 38	38	C	156	159	Right-handed 310
Helix 39	39	C	160	170	Right-handed alpha
Helix 40	40	C	186	188	Right-handed 310
Helix 41	41	C	189	196	Right-handed alpha
Helix 42	42	C	236	250	Right-handed alpha
Helix 43	43	D	17	22	Right-handed 310
Helix 44	44	D	37	47	Right-handed alpha
Helix 45	45	D	48	66	Right-handed alpha
Helix 46	46	D	69	93	Right-handed alpha
Helix 47	47	D	97	104	Right-handed alpha
Helix 48	48	D	108	112	Right-handed 310
Helix 49	49	D	113	118	Right-handed alpha
Helix 50	50	D	127	139	Right-handed alpha
Helix 51	51	D	147	151	Right-handed 310
Helix 52	52	D	156	159	Right-handed 310
Helix 53	53	D	160	170	Right-handed alpha
Helix 54	54	D	186	188	Right-handed 310
Helix 55	55	D	189	196	Right-handed alpha
Helix 56	56	D	236	250	Right-handed alpha
Helix 57	57	E	17	22	Right-handed 310
Helix 58	58	E	37	47	Right-handed alpha
Helix 59	59	E	48	66	Right-handed alpha
Helix 60	60	E	69	93	Right-handed alpha
Helix 61	61	E	97	104	Right-handed alpha
Helix 62	62	E	108	112	Right-handed 310
Helix 63	63	E	113	118	Right-handed alpha
Helix 64	64	E	127	139	Right-handed alpha
Helix 65	65	E	147	151	Right-handed 310
Helix 66	66	E	156	159	Right-handed 310
Helix 67	67	E	160	170	Right-handed alpha
Helix 68	68	E	186	188	Right-handed 310
Helix 69	69	E	189	196	Right-handed alpha
Helix 70	70	E	236	250	Right-handed alpha
Helix 71	71	F	17	22	Right-handed 310
Helix 72	72	F	37	47	Right-handed alpha
Helix 73	73	F	48	66	Right-handed alpha
Helix 74	74	F	69	93	Right-handed alpha
Helix 75	75	F	97	104	Right-handed alpha
Helix 76	76	F	108	112	Right-handed 310
Helix 77	77	F	113	118	Right-handed alpha
Helix 78	78	F	127	139	Right-handed alpha
Helix 79	79	F	147	151	Right-handed 310
Helix 80	80	F	156	159	Right-handed 310
Helix 81	81	F	160	170	Right-handed alpha
Helix 82	82	F	186	188	Right-handed 310
Helix 83	83	F	189	196	Right-handed alpha
Helix 84	84	F	236	250	Right-handed alpha
Helix 85	85	G	17	22	Right-handed 310
Helix 86	86	G	37	47	Right-handed alpha
Helix 87	87	G	48	66	Right-handed alpha
Helix 88	88	G	69	93	Right-handed alpha
Helix 89	89	G	97	104	Right-handed alpha
Helix 90	90	G	108	112	Right-handed 310
Helix 91	91	G	113	118	Right-handed alpha
Helix 92	92	G	127	139	Right-handed alpha
Helix 93	93	G	147	151	Right-handed 310
Helix 94	94	G	156	159	Right-handed 310
Helix 95	95	G	160	170	Right-handed alpha
Helix 96	96	G	186	188	Right-handed 310
Helix 97	97	G	189	196	Right-handed alpha
Helix 98	98	G	236	250	Right-handed alpha
Helix 99	99	H	17	22	Right-handed 310
Helix 100	100	H	37	45	Right-handed alpha
Helix 101	101	H	48	66	Right-handed alpha
Helix 102	102	H	69	93	Right-handed alpha
Helix 103	103	H	97	104	Right-handed alpha
Helix 104	104	H	108	112	Right-handed 310
Helix 105	105	H	113	118	Right-handed alpha
Helix 106	106	H	127	139	Right-handed alpha
Helix 107	107	H	147	151	Right-handed 310
Helix 108	108	H	156	159	Right-handed 310
Helix 109	109	H	160	170	Right-handed alpha
Helix 110	110	H	186	188	Right-handed 310
Helix 111	111	H	189	196	Right-handed alpha
Helix 112	112	H	236	250	Right-handed alpha

There are 16 sheets in PDB entry 2XTQ. Click on sheet of interest to get list of strands forming it: AA, AB, BA, BB, CA, CB, A, DB, EA, EB, FA, FB, GA, GB, HA, HB,

There are 3 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	144	145	first strand
Strand 2	A	255	258	parallel
Strand 3	A	227	230	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	173	184	first strand
Strand 2	A	198	209	anti-parallel
Strand 3	A	214	223	anti-parallel
Strand 4	A	263	270	anti-parallel

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There are 3 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	144	145	first strand
Strand 2	B	255	258	parallel
Strand 3	B	227	230	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	173	184	first strand
Strand 2	B	198	209	anti-parallel
Strand 3	B	214	223	anti-parallel
Strand 4	B	262	270	anti-parallel

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There are 3 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	144	145	first strand
Strand 2	C	255	258	parallel
Strand 3	C	227	230	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	173	184	first strand
Strand 2	C	198	209	anti-parallel
Strand 3	C	214	223	anti-parallel
Strand 4	C	263	270	anti-parallel

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There are 3 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	144	145	first strand
Strand 2	D	255	258	parallel
Strand 3	D	227	230	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	173	184	first strand
Strand 2	D	198	209	anti-parallel
Strand 3	D	214	223	anti-parallel
Strand 4	D	263	270	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	144	145	first strand
Strand 2	E	255	258	parallel
Strand 3	E	227	230	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	173	184	first strand
Strand 2	E	198	209	anti-parallel
Strand 3	E	214	223	anti-parallel
Strand 4	E	263	270	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	144	145	first strand
Strand 2	F	255	258	parallel
Strand 3	F	227	230	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	173	184	first strand
Strand 2	F	198	209	anti-parallel
Strand 3	F	215	223	anti-parallel
Strand 4	F	262	269	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	144	145	first strand
Strand 2	G	255	258	parallel
Strand 3	G	227	230	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	173	184	first strand
Strand 2	G	198	209	anti-parallel
Strand 3	G	214	223	anti-parallel
Strand 4	G	262	270	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	144	145	first strand
Strand 2	H	255	258	parallel
Strand 3	H	227	230	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	173	184	first strand
Strand 2	H	198	209	anti-parallel
Strand 3	H	214	223	anti-parallel
Strand 4	H	263	270	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: 2XTQ

Analysis of interatomic Contacts of Structural Units in PDB entry:
2XTQ