Contacts of the strand formed by residues 18 - 22 (chain A) in PDB entry 2ARE
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 LEU 18 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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8A PHE* 4.0 18.2 - - + -
11A PHE* 4.1 21.5 - - + -
15A GLN* 3.6 35.1 - - + +
16A LYS 3.5 5.1 - - - +
17A ASN* 1.3 83.9 - - - +
19A ILE* 1.3 64.5 + - - +
20A PHE* 3.7 36.5 - - + -
31A VAL* 4.9 1.8 - - + -
50A ILE* 4.3 22.7 - - + -
51A LEU 3.5 15.3 - - - +
52A PHE* 4.2 8.5 - - + -
231A TRP* 4.4 6.5 - - + -
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Residues in contact with ILE 19 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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18A LEU* 1.3 75.0 - - - +
20A PHE* 1.3 65.0 + - - +
21A GLN* 4.1 26.4 - - + +
50A ILE* 3.1 7.8 - - - +
51A LEU* 2.9 42.0 + - + +
52A PHE 4.5 1.8 - - - +
53A SER* 4.1 18.4 - - - -
212A ARG* 3.8 40.8 - - - +
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Residues in contact with PHE 20 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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15A GLN* 4.4 13.2 - - + -
18A LEU* 3.7 37.2 - - + -
19A ILE* 1.3 77.1 - - - +
21A GLN* 1.3 63.3 + - - +
22A GLY 5.9 0.4 - - - +
24A ALA 3.6 26.9 - - - +
25A GLN* 4.3 9.6 - - - -
26A ILE* 3.9 34.5 - - + -
31A VAL* 4.8 1.3 - - + -
49A ARG 3.7 2.0 - - - -
50A ILE* 3.6 24.2 - - + -
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Residues in contact with GLN 21 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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19A ILE* 4.1 17.2 - - + +
20A PHE* 1.3 80.6 - - - +
22A GLY* 1.3 69.4 + - - +
23A ASP 3.4 0.7 + - - -
24A ALA 3.5 4.2 + - - -
48A GLY* 3.4 0.5 - - - -
49A ARG* 2.9 71.3 + - + +
51A LEU* 3.9 16.0 - - - +
97A THR 3.1 22.0 + - - -
98A THR* 3.9 15.8 - - - +
99A ILE* 3.8 13.6 + - + -
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Residues in contact with GLY 22 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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20A PHE* 5.4 0.9 - - - +
21A GLN* 1.3 74.8 - - - +
23A ASP* 1.3 64.0 + - - +
24A ALA 3.6 1.9 + - - +
47A VAL 3.6 3.8 - - - -
99A ILE* 3.5 20.6 - - - +
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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