Contacts of the helix formed by residues 17 - 24 (chain B) in PDB entry 4EQG
Residue contacts within the protein 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). A
short description of the analytical approach
is given at the end of the page.
Note:
Non-standard 3 letter residue
codes indicate a heterogroup. To identify
and analyse, use LPC software
Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC - hydrophobic-hydrophilic contact (destabilizing contact)
+/- - indicates presence/absence of a specific contacts
* - indicates residues forming contacts by their side chain
(including CA atoms)
Residues in contact with THR 17 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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15B GLY 3.5 1.4 - - - -
16B ASP* 1.3 85.6 - - + +
18B ILE* 1.3 64.6 + - - +
19B PHE* 3.0 23.7 + - - +
20B GLY 2.9 13.5 + - - -
21B LYS* 3.3 10.7 + - - +
59B HIS* 4.2 9.4 - - + +
108B VAL* 4.0 5.7 - - + +
109B TYR* 3.7 32.3 - - + +
110B HIS* 3.6 10.8 + - + +
202B EPE 3.0 23.1 - - - +
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Residues in contact with ILE 18 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17B THR* 1.3 71.6 - - - +
19B PHE* 1.3 69.6 + - + +
21B LYS* 3.2 13.9 + - + +
22B ILE* 3.0 29.6 + - - +
27B ILE* 3.7 13.5 - - + +
108B VAL* 4.0 13.7 - - + -
201B A5A 3.1 43.7 - - + +
202B EPE 2.7 48.5 + - + +
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Residues in contact with PHE 19 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17B THR* 3.0 9.1 + - - +
18B ILE* 1.3 97.0 - - + +
20B GLY* 1.3 59.4 + - - +
22B ILE* 3.3 10.5 + - + +
23B ILE* 2.9 33.8 + - - +
41B PHE* 4.0 17.0 - + - -
53B LEU* 3.6 11.9 - - + -
55B ILE* 3.7 30.6 - - + +
108B VAL* 3.8 22.2 - - + -
110B HIS* 3.9 18.6 - + + +
112B HIS* 3.6 31.9 - + + -
201B A5A 3.5 34.1 - + - -
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Residues in contact with GLY 20 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14B GLY* 3.2 29.2 + - - -
15B GLY 3.6 8.3 - - - -
17B THR* 2.9 12.9 + - - -
19B PHE* 1.3 76.5 - - - +
21B LYS* 1.3 64.2 + - - +
23B ILE* 3.2 3.8 + - - +
24B ARG* 3.0 35.4 + - - -
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Residues in contact with LYS 21 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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12B ARG* 4.9 9.8 - - - +
16B ASP 4.9 4.9 - - - +
17B THR 3.3 14.3 + - - +
18B ILE* 3.2 16.3 + - + +
20B GLY* 1.3 75.2 - - - +
22B ILE* 1.3 61.5 + - - +
24B ARG* 3.4 9.0 + - - +
25B LYS 3.2 3.3 + - - -
26B GLU* 2.8 69.3 + - + +
27B ILE* 3.5 28.7 + - + -
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Residues in contact with ILE 22 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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18B ILE 3.0 17.7 + - - +
19B PHE* 3.5 14.1 - - + +
20B GLY 3.2 0.2 - - - -
21B LYS* 1.3 73.7 - - - +
23B ILE* 1.3 67.7 + - - +
25B LYS* 3.0 19.4 + - - +
27B ILE* 3.5 25.6 - - + +
28B PRO 4.5 1.1 - - - +
29B ALA* 3.6 26.0 - - + -
31B ILE* 5.3 3.0 - - + +
39B LEU* 3.6 23.8 - - + +
41B PHE* 3.8 32.3 - - + -
201B A5A 3.9 26.5 - - + +
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Residues in contact with ILE 23 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13B PRO* 4.7 2.9 - - + +
14B GLY* 4.0 18.6 - - - -
19B PHE 2.9 21.2 + - - +
20B GLY* 3.2 5.8 + - - +
22B ILE* 1.3 78.2 - - - +
24B ARG* 1.3 62.5 + - + +
25B LYS* 3.4 16.5 + - - +
34B GLU* 4.9 4.3 - - - +
39B LEU* 4.3 13.9 - - + -
55B ILE* 3.7 24.5 - - + -
56B PRO 3.7 16.8 - - - +
57B LYS* 3.9 36.5 - - + +
110B HIS* 3.9 13.7 - - + -
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Residues in contact with ARG 24 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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12B ARG* 3.3 41.8 - - - +
13B PRO* 2.8 56.9 + - + +
15B GLY 3.1 24.5 + - - +
20B GLY 3.0 24.7 + - - +
21B LYS* 3.9 9.1 - - - +
22B ILE 3.2 0.4 - - - -
23B ILE* 1.3 78.1 - - + +
25B LYS* 1.3 73.8 + - - +
26B GLU* 3.0 44.0 + - - +
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A short description of the
analytical approach
The contact analysis used in this page
is based upon the approach
developed in:
Sobolev V., Wade R.C., Vriend G.
and Edelman M. PROTEINS (1996)
25, 120-129.
Contact legitimacy depends on the hydrophobic-hydrophilic
properties of the contacting atoms. In order to
define it, for each inter-atomic contact,
eight atom classes have been introduced:
I Hydrophilic - N and O that can donate and accept hydrogen bonds
(e.g., oxygen of hydroxyl group of Ser. or Thr)
II Acceptor - N or O that can only accept a hydrogen bond
III Donor - N that can only donate a hydrogen bond
IV Hydrophobic - Cl, Br, I and all C atoms that are not in
aromatic rings and do not have a covalent bond to
a N or O atom
V Aromatic - C in aromatic rings irrespective of any other
bonds formed by the atom
VI Neutral - C atoms that have a covalent bond to at least one
atom of class I or two or more atoms from class II
or III; atoms; S, F, P, and metal atoms in all cases
VII Neutral-donor - C atoms that have a covalent bond with only one
atom of class III
VIII Neutral-acceptor - C atoms that have a covalent bond with only
one atom of class II
For each pair of contacts the state of legitimacy
is shown below:
Legend:
+, legitimate
-, illegitimate
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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Warning!
Atom classes for heterogroups are automatically
assigned based on the atomic coordinates. However, in
three cases (see below) the automatic assignment
is currently ambiguous. In these
cases, the user is advised to manually analyse
the full list of contacts using
LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are
considered "aromatic" (Class V) if the ring is approximately
planar, and "hydrophobic" (Class IV) or "neutral" (Classes
VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
"hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
"carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).
Please E-mail any
questions and/or suggestions concerning this page to
Vladimir.Sobolev@weizmann.ac.il