Contacts of the strand formed by residues 68 - 71 (chain B) in PDB entry 1IBM
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 ILE 68 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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57B PHE* 6.3 1.1 - - + -
58B ILE* 3.5 32.5 - - + +
61B LEU* 3.7 22.7 - - + -
62B ALA* 5.6 2.0 - - - +
67B THR* 1.3 78.9 - - - +
69B LEU* 1.3 63.7 + - - +
70B PHE* 2.9 24.6 + - + -
90B MET* 2.9 23.5 - - + +
91B PRO* 4.4 3.9 - - - +
161B ALA* 3.9 10.5 - - + -
162B ILE 4.0 7.9 - - - +
163B PHE* 3.7 34.5 - - + +
185B ILE* 4.6 3.8 - - + -
222B ILE* 3.9 15.7 - - + -
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Residues in contact with LEU 69 (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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68B ILE* 1.3 69.1 - - - +
70B PHE* 1.3 76.5 + - - +
71B VAL* 3.1 18.6 + - + -
91B PRO* 4.3 10.4 - - + +
92B TYR* 4.0 7.6 - - - +
93B VAL* 4.0 17.0 - - + +
97B TRP* 5.3 1.1 - - - +
102B LEU* 4.0 15.0 - - + -
152B PHE* 4.2 10.1 - - + -
155B LEU* 3.3 32.5 - - + -
159B PRO* 4.0 13.6 - - + +
161B ALA 3.5 5.9 + - - -
162B ILE* 3.2 32.1 - - + +
163B PHE 2.9 22.4 + - - +
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Residues in contact with PHE 70 (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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58B ILE* 6.5 0.2 - - + -
68B ILE* 2.9 36.2 + - + -
69B LEU* 1.3 84.3 - - - +
71B VAL* 1.3 60.2 + - - +
72B GLY 4.3 0.2 - - - -
81B VAL* 4.4 11.7 - - + -
84B GLU* 5.3 1.3 - - + -
85B ALA* 4.4 12.8 - - + -
90B MET* 3.7 29.2 - - + -
91B PRO 3.4 10.7 + - - +
92B TYR* 3.2 8.6 - - + +
93B VAL 3.2 15.2 + - - +
163B PHE* 3.3 26.5 - + + -
215B LEU* 3.4 38.1 - - + -
218B ALA* 4.9 8.1 - - + -
219B VAL* 4.4 20.0 - - + -
222B ILE* 4.0 17.5 - - + -
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Residues in contact with VAL 71 (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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69B LEU* 3.1 34.1 - - + +
70B PHE* 1.3 72.2 - - - +
72B GLY* 1.3 61.6 + - - +
73B THR* 4.7 1.8 - - - +
81B VAL* 4.8 0.9 - - - -
93B VAL* 3.6 11.4 - - + +
97B TRP* 3.7 28.0 - - + +
162B ILE* 4.4 8.1 - - + -
163B PHE 2.6 11.8 + - - +
164B VAL* 3.5 17.1 - - + +
165B VAL* 2.9 31.5 + - - +
170B GLU* 3.4 29.2 - - + +
173B ALA* 4.8 2.2 - - + -
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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