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

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 2XLA entry

There are 4 chains in PDB entry 2XLA (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	HIS 65	SER 297
B	ILE 64	SER 297
C	GLU 63	SER 297
D	ILE 64	SER 297

There are 21 helices in PDB entry 2XLA. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	209	218	Right-handed alpha
Helix 2	2	A	231	241	Right-handed alpha
Helix 3	3	A	242	245	Right-handed 310
Helix 4	4	A	265	270	Right-handed alpha
Helix 5	5	A	273	290	Right-handed alpha
Helix 6	6	B	209	218	Right-handed alpha
Helix 7	7	B	231	241	Right-handed alpha
Helix 8	8	B	242	245	Right-handed 310
Helix 9	9	B	252	255	Right-handed 310
Helix 10	10	B	265	270	Right-handed alpha
Helix 11	11	B	273	289	Right-handed alpha
Helix 12	12	C	209	218	Right-handed alpha
Helix 13	13	C	231	241	Right-handed alpha
Helix 14	14	C	242	245	Right-handed 310
Helix 15	15	C	265	270	Right-handed alpha
Helix 16	16	C	273	290	Right-handed alpha
Helix 17	17	D	209	218	Right-handed alpha
Helix 18	18	D	231	241	Right-handed alpha
Helix 19	19	D	242	245	Right-handed 310
Helix 20	20	D	265	271	Right-handed alpha
Helix 21	21	D	273	290	Right-handed alpha

There are 20 sheets in PDB entry 2XLA. Click on sheet of interest to get list of strands forming it: AA, AB, AC, AD, AE, BA, BB, BC, BD, BE, CA, CB, CC, CD, CE, A, DB, C, DD, DE,

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	A	79	82	first strand
Strand 2	A	88	96	anti-parallel

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There are 6 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	169	172	first strand
Strand 2	A	122	127	anti-parallel
Strand 3	A	188	196	anti-parallel
Strand 4	A	99	108	anti-parallel
Strand 5	A	88	96	anti-parallel
Strand 6	A	295	296	parallel

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There are 6 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	169	172	first strand
Strand 2	A	122	127	anti-parallel
Strand 3	A	188	196	anti-parallel
Strand 4	A	99	108	anti-parallel
Strand 5	A	88	96	anti-parallel
Strand 6	A	79	82	anti-parallel

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There are 2 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	295	296	first strand
Strand 2	A	88	96	parallel

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There are 6 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	247	249	first strand
Strand 2	A	117	119	anti-parallel
Strand 3	A	176	181	anti-parallel
Strand 4	A	134	141	anti-parallel
Strand 5	A	157	163	anti-parallel
Strand 6	A	257	261	parallel

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There are 2 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	79	83	first strand
Strand 2	B	87	96	anti-parallel

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There are 6 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	169	172	first strand
Strand 2	B	122	127	anti-parallel
Strand 3	B	188	196	anti-parallel
Strand 4	B	99	108	anti-parallel
Strand 5	B	87	96	anti-parallel
Strand 6	B	295	296	parallel

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There are 6 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	169	172	first strand
Strand 2	B	122	127	anti-parallel
Strand 3	B	188	196	anti-parallel
Strand 4	B	99	108	anti-parallel
Strand 5	B	87	96	anti-parallel
Strand 6	B	79	83	anti-parallel

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There are 2 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	295	296	first strand
Strand 2	B	87	96	parallel

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There are 6 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	247	249	first strand
Strand 2	B	117	119	anti-parallel
Strand 3	B	176	181	anti-parallel
Strand 4	B	134	141	anti-parallel
Strand 5	B	157	163	anti-parallel
Strand 6	B	257	261	parallel

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There are 2 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	79	83	first strand
Strand 2	C	87	96	anti-parallel

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There are 6 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	169	172	first strand
Strand 2	C	122	127	anti-parallel
Strand 3	C	188	196	anti-parallel
Strand 4	C	99	108	anti-parallel
Strand 5	C	87	96	anti-parallel
Strand 6	C	295	296	parallel

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There are 6 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	169	172	first strand
Strand 2	C	122	127	anti-parallel
Strand 3	C	188	196	anti-parallel
Strand 4	C	99	108	anti-parallel
Strand 5	C	87	96	anti-parallel
Strand 6	C	79	83	anti-parallel

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There are 2 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	295	296	first strand
Strand 2	C	87	96	parallel

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There are 6 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	247	249	first strand
Strand 2	C	117	119	anti-parallel
Strand 3	C	176	181	anti-parallel
Strand 4	C	134	141	anti-parallel
Strand 5	C	157	163	anti-parallel
Strand 6	C	257	261	parallel

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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	D	79	82	first strand
Strand 2	D	88	96	anti-parallel

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There are 6 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	169	172	first strand
Strand 2	D	122	127	anti-parallel
Strand 3	D	188	196	anti-parallel
Strand 4	D	99	108	anti-parallel
Strand 5	D	88	96	anti-parallel
Strand 6	D	295	296	parallel

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There are 6 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	169	172	first strand
Strand 2	D	122	127	anti-parallel
Strand 3	D	188	196	anti-parallel
Strand 4	D	99	108	anti-parallel
Strand 5	D	88	96	anti-parallel
Strand 6	D	79	82	anti-parallel

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There are 2 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	295	296	first strand
Strand 2	D	88	96	parallel

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There are 6 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	247	249	first strand
Strand 2	D	117	119	anti-parallel
Strand 3	D	176	181	anti-parallel
Strand 4	D	134	141	anti-parallel
Strand 5	D	157	163	anti-parallel
Strand 6	D	257	261	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: 2XLA

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