Contacts of the helix formed by residues 82 - 92 (chain C) 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 GLU 82 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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77C ILE 3.7 1.4 + - - -
78C GLY* 5.0 0.4 - - - -
79C ARG* 3.4 53.4 + - + +
80C GLY 3.8 0.2 - - - -
81C GLY* 1.3 77.5 - - - +
83C ARG* 1.3 58.5 + - - +
85C ARG* 4.6 2.6 - - - +
86C VAL* 2.9 25.6 - - - +
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Residues in contact with ARG 83 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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46C GLU* 3.5 46.7 + - - +
47C LEU* 4.3 5.4 - - - +
49C SER* 4.5 4.0 + - - -
75C VAL* 3.2 35.1 + - - +
76C VAL* 3.1 15.7 + - - +
77C ILE 2.7 19.9 + - - +
78C GLY* 3.4 10.3 - - - -
81C GLY 3.3 0.2 - - - -
82C GLU* 1.3 73.4 - - - +
84C ILE* 1.3 51.1 + - - +
85C ARG 2.6 7.5 + - - -
86C VAL* 2.5 31.6 + - + -
87C LEU* 2.9 35.8 + - + +
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Residues in contact with ILE 84 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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76C VAL* 3.6 7.6 + - + -
77C ILE* 2.6 49.4 + - + +
81C GLY* 3.5 29.4 - - - +
83C ARG* 1.3 71.4 - - - +
85C ARG* 1.3 57.7 + - + +
87C LEU* 4.9 7.2 - - - -
88C ARG* 3.3 49.0 + - - +
101C LEU* 4.0 10.8 - - + +
102C ASN* 5.9 0.4 - - - -
103C VAL* 4.4 20.4 - - + +
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Residues in contact with ARG 85 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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81C GLY 3.4 19.3 - - - +
82C GLU 4.8 2.5 - - - -
83C ARG 2.6 4.8 + - - -
84C ILE* 1.3 78.0 - - + +
86C VAL* 1.3 61.9 + - + +
87C LEU 3.5 0.2 - - - -
88C ARG* 3.4 18.4 - - - +
89C GLU* 2.8 61.6 + - - +
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Residues in contact with VAL 86 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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82C GLU* 2.9 31.9 - - - +
83C ARG* 2.5 21.4 + - + +
85C ARG* 1.3 73.0 - - + +
87C LEU* 1.3 62.9 + - + +
89C GLU* 3.0 8.3 + - - +
90C GLU* 2.8 34.2 + - + +
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Residues in contact with LEU 87 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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43C LEU* 5.5 4.3 - - + -
46C GLU* 4.8 11.9 - - + +
47C LEU* 3.9 28.9 - - + -
76C VAL* 4.1 27.4 - - + +
83C ARG* 2.9 44.9 + - + +
84C ILE* 4.9 1.6 - - - -
86C VAL* 1.3 77.5 - - + +
88C ARG* 1.3 54.9 + - - +
90C GLU* 2.8 11.5 + - + -
91C LEU* 2.8 37.4 + - + +
101C LEU* 3.5 19.1 - - + -
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Residues in contact with ARG 88 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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84C ILE* 3.3 39.4 + - - +
85C ARG* 3.4 22.4 - - - +
87C LEU* 1.3 79.6 - - - +
89C GLU* 1.3 57.7 + - - +
90C GLU 3.3 1.2 + - - -
91C LEU* 2.8 24.1 - - - +
92C ALA* 3.6 10.2 - - - +
99C VAL* 4.4 6.4 - - - +
100C ALA* 4.0 12.7 - - - +
101C LEU* 3.2 48.2 + - + +
102C ASN* 3.7 19.2 + - - +
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Residues in contact with GLU 89 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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85C ARG* 2.8 54.2 + - - +
86C VAL* 3.0 8.7 + - + +
88C ARG* 1.3 75.3 - - - +
90C GLU* 1.3 59.1 + - - +
92C ALA* 4.1 12.5 - - + +
93C LYS* 4.3 13.4 - - - +
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Residues in contact with GLU 90 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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42C LEU* 3.1 31.7 - - + +
86C VAL* 2.8 17.9 + - + +
87C LEU* 2.8 15.1 + - + +
89C GLU* 1.3 78.4 - - - +
91C LEU* 1.3 54.4 + - - +
92C ALA 2.7 4.9 + - - -
93C LYS* 2.7 43.8 + - - +
94C LEU* 3.7 6.3 + - - +
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Residues in contact with LEU 91 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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39C ILE* 5.4 4.9 - - + -
42C LEU* 6.0 0.7 - - - -
43C LEU* 5.0 13.5 - - + -
66C VAL* 3.7 28.0 - - + -
87C LEU* 2.8 21.9 + - + +
88C ARG* 2.8 37.2 - - - +
90C GLU* 1.3 71.4 - - - +
92C ALA* 1.3 50.6 + - - +
93C LYS 3.3 0.9 - - - -
94C LEU* 3.8 22.1 - - + +
95C THR* 2.6 39.5 + - + +
99C VAL* 3.3 32.1 - - + +
100C ALA 3.6 9.9 - - - +
101C LEU* 3.9 11.9 - - + -
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Residues in contact with ALA 92 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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88C ARG 3.6 16.8 - - - +
89C GLU* 4.1 12.3 - - + +
90C GLU 2.7 0.6 + - - -
91C LEU* 1.3 79.5 - - - +
93C LYS* 1.3 59.5 + - - +
94C LEU 3.2 1.8 - - - -
95C THR* 3.9 2.2 - - - -
96C GLY* 3.3 23.5 + - - +
99C VAL* 3.5 14.4 - - + +
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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