Contacts of the helix formed by residues 89 - 93 (chain F) in PDB entry 4IHB
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 ARG 89 (chain F).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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89D ARG* 3.5 42.9 - - - +
89E ARG* 4.6 14.5 - - - +
90E GLU* 6.3 0.8 - - - -
59F LEU 5.8 0.4 - - - -
60F ASP* 4.7 9.8 - - - +
61F GLN* 3.6 61.1 + - - +
63F SER* 4.3 3.2 + - - -
87F PRO* 3.7 33.4 - - + +
88F LEU* 1.3 78.4 - - - +
90F GLU* 1.3 63.9 + - - +
92F LEU* 3.0 21.6 + - - +
93F ALA* 3.4 9.5 + - - +
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Residues in contact with GLU 90 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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87F PRO* 3.6 18.2 - - + +
88F LEU 3.0 0.2 - - - -
89F ARG* 1.3 86.6 + - + +
91F VAL* 1.3 61.8 + - - +
93F ALA* 3.4 22.1 + - + +
94F THR* 4.8 1.4 + - - +
98F SER 4.1 3.6 - - - +
99F ALA* 3.7 13.6 - - + +
100F SER 3.6 10.7 - - - +
101F PHE* 3.5 22.3 - - + -
202F FMT 2.9 24.8 + - - +
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Residues in contact with VAL 91 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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2F LEU* 5.4 4.7 - - + -
59F LEU* 6.2 2.2 - - + -
88F LEU* 2.9 27.2 + - + +
90F GLU* 1.3 80.3 - - - +
92F LEU* 1.3 63.9 + - + +
93F ALA 3.3 2.9 + - - -
94F THR* 3.9 2.9 + - - +
97F LEU* 3.2 46.0 - - - +
98F SER* 3.6 8.5 + - - +
99F ALA* 4.2 8.7 - - + -
101F PHE* 4.8 2.9 - - + -
121F VAL* 3.9 34.3 - - + +
122F SER* 4.4 1.6 - - - -
123F TYR* 4.1 13.9 - - + +
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Residues in contact with LEU 92 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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104E PRO* 3.2 26.3 - - + +
106E LEU* 4.0 21.5 - - + -
112E PRO* 4.3 6.5 - - + -
206E FMT 4.2 10.7 + - - +
59F LEU* 3.9 43.3 - - + +
60F ASP* 3.5 29.2 - - - +
88F LEU 4.7 6.1 - - - +
89F ARG* 3.0 13.2 + - - +
91F VAL* 1.3 84.1 - - + +
93F ALA* 1.3 58.6 + - - +
94F THR 3.4 2.0 - - - -
97F LEU* 3.6 25.8 - - + -
123F TYR* 5.4 0.9 - - + -
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Residues in contact with ALA 93 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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101E PHE* 6.0 1.0 - - - +
102E ASN 3.4 14.7 + - - +
103E ALA* 4.6 1.4 - - - +
104E PRO* 4.1 2.7 - - - +
89F ARG 3.4 4.8 + - - +
90F GLU* 3.4 24.9 - - + +
91F VAL 3.3 1.8 - - - -
92F LEU* 1.3 79.9 - - - +
94F THR* 1.3 69.9 + - + +
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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