Contacts of the helix formed by residues 152 - 162 (chain B) in PDB entry 2I6A
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 152 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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147B GLU 4.3 15.3 - - - +
148B LYS* 4.1 13.9 - - - +
149B HIS* 3.0 21.3 + - + +
151B ASP* 1.3 77.4 - - + +
153B GLU* 1.3 65.7 + - - +
154B LYS* 4.4 24.0 - - + +
155B ASN* 2.9 20.0 + - - +
156B TRP* 2.8 19.8 + - - -
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Residues in contact with GLU 153 (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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151B ASP 3.3 5.7 + - - -
152B LEU* 1.3 70.0 - - - +
154B LYS* 1.3 62.9 + - - +
156B TRP* 4.5 5.6 - - - +
157B MET* 3.0 41.4 + - + +
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Residues in contact with LYS 154 (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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152B LEU* 3.0 22.2 + - + +
153B GLU* 1.3 78.9 - - - +
155B ASN* 1.3 85.1 + - - +
157B MET* 3.4 26.7 - - + +
158B LEU* 3.7 13.2 - - - +
92D ILE 5.5 4.6 + - - -
93D ASP* 5.8 4.9 - - - +
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Residues in contact with ASN 155 (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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87B PHE* 3.5 26.4 - - + -
111B HIS* 4.6 15.8 + - - +
149B HIS* 2.6 57.5 + - - +
150B LEU 4.2 0.9 - - - +
152B LEU* 2.9 11.2 + - - +
154B LYS* 1.3 98.0 - - - +
156B TRP* 1.3 66.8 + - - +
157B MET 3.1 1.6 - - - -
158B LEU* 3.0 23.0 + - - +
159B VAL* 3.4 4.2 + - - +
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Residues in contact with TRP 156 (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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150B LEU* 3.1 41.7 + - + +
151B ASP* 4.5 4.9 - - - +
152B LEU 2.8 17.8 + - - +
153B GLU* 4.5 4.0 - - - +
155B ASN* 1.3 74.0 - - - +
157B MET* 1.3 61.9 - - - +
159B VAL* 3.3 24.7 - - + +
160B GLU* 3.1 48.2 + - + +
181B LYS* 3.1 53.6 - - + -
182B VAL* 4.4 4.9 - - + -
185B HIS* 3.6 40.6 - + + -
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Residues in contact with MET 157 (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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153B GLU* 3.0 36.1 + - + +
154B LYS* 3.4 25.4 - - + +
156B TRP* 1.3 76.9 - - - +
158B LEU* 1.3 68.8 + - + +
160B GLU* 2.9 26.0 + - - +
161B LYS* 3.4 13.5 + - + +
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Residues in contact with LEU 158 (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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7B ASN* 4.1 27.1 - - - +
10B PHE* 5.2 3.2 - - - +
85B THR* 4.3 13.7 + - + -
87B PHE* 4.2 10.3 - - + -
109B ASP* 4.0 7.2 - - - +
111B HIS* 3.0 46.0 - - + +
154B LYS 3.7 15.5 - - - +
155B ASN* 3.0 10.8 + - - +
157B MET* 1.3 83.0 - - + +
159B VAL* 1.3 56.8 - - - +
161B LYS* 3.0 37.4 + - + +
162B ALA* 3.8 3.5 + - - +
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Residues in contact with VAL 159 (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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10B PHE* 4.0 22.4 - - + -
87B PHE* 3.8 11.0 - - + -
150B LEU* 3.7 27.1 - - + -
155B ASN 3.7 11.7 - - - +
156B TRP* 3.3 39.7 - - + +
158B LEU* 1.3 77.5 - - - +
160B GLU* 1.3 60.4 + - - +
161B LYS 3.1 0.9 + - - -
162B ALA* 3.4 18.2 + - - +
165B CYS* 4.8 4.0 - - - -
182B VAL* 4.2 18.4 - - + -
185B HIS* 4.5 11.2 + - + -
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Residues in contact with GLU 160 (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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156B TRP* 3.1 42.4 + - + +
157B MET* 2.9 15.0 + - - +
159B VAL* 1.3 71.3 - - - +
161B LYS* 1.3 61.4 + - + +
162B ALA 3.2 1.3 - - - -
185B HIS* 2.7 40.8 + - + +
191B ARG* 3.5 22.7 + - - +
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Residues in contact with LYS 161 (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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5B ARG* 5.7 5.8 - - - +
6B GLU* 3.1 25.1 + - - +
7B ASN* 2.7 44.4 + - + +
8B ILE* 4.2 7.4 - - - +
157B MET* 3.5 15.0 - - + +
158B LEU* 3.0 29.0 + - + +
160B GLU* 1.3 79.3 - - - +
162B ALA* 1.3 61.2 + - - +
163B ARG* 3.7 6.6 + - - +
191B ARG* 5.0 1.7 + - - -
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Residues in contact with ALA 162 (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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7B ASN 3.3 15.0 + - - +
8B ILE 3.6 0.9 - - - -
10B PHE* 3.4 34.3 - - + +
158B LEU 3.8 1.1 + - - +
159B VAL 3.4 14.6 - - - +
160B GLU 3.2 1.5 - - - +
161B LYS* 1.3 78.7 - - - +
163B ARG* 1.3 59.7 + - - +
164B VAL 3.7 10.1 - - - +
165B CYS* 3.9 7.5 - - - -
185B HIS* 6.0 0.2 - - - -
191B ARG* 3.1 29.0 + - - +
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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