Contacts of the helix formed by residues 152 - 160 (chain A) 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 A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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147A GLU 4.4 13.7 - - - +
148A LYS* 4.1 15.9 - - - +
149A HIS* 3.2 19.9 + - + +
151A ASP* 1.3 78.5 - - - +
153A GLU* 1.3 62.5 + - - +
154A LYS* 3.8 26.9 - - + +
155A ASN* 3.2 17.8 + - - +
156A TRP* 2.8 25.8 + - - +
116C ASN* 6.4 2.0 - - + -
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Residues in contact with GLU 153 (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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151A ASP 3.3 4.2 + - - -
152A LEU* 1.3 73.1 - - - +
154A LYS* 1.3 60.7 + - - +
156A TRP* 4.4 3.8 - - - +
157A MET* 2.8 53.5 + - + +
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Residues in contact with LYS 154 (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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152A LEU* 3.8 27.2 - - + +
153A GLU* 1.3 78.8 - - - +
155A ASN* 1.3 78.7 + - - +
157A MET* 3.4 24.2 - - + +
158A LEU* 3.7 15.2 - - - +
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Residues in contact with ASN 155 (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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87A PHE* 3.3 34.4 - - + -
111A HIS* 4.6 17.2 + - - +
149A HIS* 2.6 57.8 + - - +
150A LEU 4.4 0.9 - - - +
152A LEU* 3.2 15.7 + - - +
153A GLU 3.1 0.4 - - - -
154A LYS* 1.3 94.0 + - - +
156A TRP* 1.3 62.3 + - - +
157A MET 2.9 6.3 + - - -
158A LEU* 3.1 11.9 + - - +
159A VAL 3.5 2.3 + - - -
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Residues in contact with TRP 156 (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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150A LEU* 3.1 43.9 + - + +
151A ASP 4.1 6.7 - - - +
152A LEU 2.8 17.9 + - - +
153A GLU* 4.4 3.4 - - - +
155A ASN* 1.3 73.0 - - - +
157A MET* 1.3 56.9 + - - +
159A VAL* 3.3 20.3 + - + +
160A GLU* 3.1 50.9 + - + +
181A LYS* 3.2 52.0 - - + -
182A VAL* 4.5 4.7 - - + -
185A HIS* 3.5 42.8 - + + -
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Residues in contact with MET 157 (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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153A GLU* 2.8 66.0 + - + +
154A LYS* 3.4 16.4 - - + +
156A TRP* 1.3 76.2 - - - +
158A LEU* 1.3 70.3 + - + +
160A GLU* 3.3 21.7 + - - +
161A LYS* 3.6 15.4 + - + +
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Residues in contact with LEU 158 (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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7A ASN* 4.0 28.1 - - - +
10A PHE* 4.9 2.7 - - - +
85A THR* 4.5 11.7 + - + +
87A PHE* 4.2 8.5 - - + -
109A ASP* 4.0 9.9 - - - +
111A HIS* 3.1 43.3 - - + +
154A LYS 3.7 16.2 - - - +
155A ASN* 3.1 9.7 + - - +
157A MET* 1.3 80.3 - - + +
159A VAL* 1.3 65.1 + - - +
161A LYS* 3.2 29.1 + - + +
162A ALA* 3.8 4.2 + - - +
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Residues in contact with VAL 159 (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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10A PHE* 3.3 45.8 - - + -
87A PHE* 3.8 11.9 - - + -
150A LEU* 3.8 14.6 - - + -
155A ASN 3.5 2.7 + - - +
156A TRP* 3.3 38.3 + - + +
157A MET 3.3 0.4 - - - -
158A LEU* 1.3 75.6 - - - +
160A GLU* 1.3 60.4 + - - +
161A LYS 3.0 6.3 + - - -
162A ALA* 3.2 17.5 + - - +
165A CYS* 5.0 5.4 - - - -
182A VAL* 4.3 15.7 - - + -
185A HIS* 4.5 12.3 + - + -
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Residues in contact with GLU 160 (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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156A TRP* 3.1 42.8 + - + +
157A MET* 3.5 13.7 - - - +
158A LEU 3.2 0.4 - - - -
159A VAL* 1.3 76.3 - - - +
161A LYS* 1.3 56.2 + - - +
162A ALA 3.5 0.7 - - - -
185A HIS* 3.0 33.4 + - + +
191A ARG* 3.4 22.7 + - - -
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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