Contacts of the helix formed by residues 163 - 168 (chain B) in PDB entry 4L2A
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 TYR 163 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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30A HIS* 6.5 0.2 - + - -
22B THR* 5.3 1.6 - - - -
158B LEU* 3.5 22.0 - - - -
159B TRP 3.6 9.9 - - - -
160B GLU* 3.1 25.0 + - + +
161B HIS 4.8 0.2 - - - -
162B ALA* 1.3 79.2 - - - +
164B TYR* 1.3 68.5 + + - +
165B ILE 3.3 2.5 - - - -
166B ASP* 3.2 6.8 + - - +
167B TYR* 2.8 38.2 + - + +
168B ARG 3.2 24.2 - - - -
169B ASN* 4.8 7.1 + - - -
171B ARG* 2.9 48.9 + - + +
174B TYR* 3.4 53.2 - + + -
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Residues in contact with TYR 164 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
25A PHE* 3.8 14.7 - - - +
26A HIS 5.2 0.2 + - - -
30A HIS* 2.7 38.9 + + - -
161A HIS* 3.5 23.6 + - + +
164A TYR* 4.2 28.5 - + + -
165A ILE* 3.7 21.8 - - + -
160B GLU* 2.8 39.1 + - + +
161B HIS 4.3 1.6 + - - -
163B TYR* 1.3 76.6 - + - +
165B ILE* 1.3 59.3 + - - +
168B ARG* 2.8 85.9 + - - +
169B ASN* 3.5 2.0 + - - -
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Residues in contact with ILE 165 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
164A TYR* 3.7 31.0 - - + -
168A ARG* 3.7 28.5 - - - +
19B SER* 4.4 2.0 - - - +
21B GLU* 3.6 27.8 - - + +
22B THR* 3.6 29.4 - - - +
25B PHE* 4.1 14.4 - - + -
161B HIS 5.1 4.2 + - - +
163B TYR 3.3 0.8 - - - -
164B TYR* 1.3 76.3 - - - +
166B ASP* 1.3 70.5 + - - +
168B ARG* 3.1 20.4 + - - +
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Residues in contact with ASP 166 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
17B HIS 4.5 1.0 - - - +
18B ILE* 3.6 8.2 - - - +
19B SER* 2.7 46.5 + - - -
22B THR* 2.7 23.3 + - - +
162B ALA 5.1 1.9 - - - +
163B TYR* 3.2 3.3 + - - +
165B ILE* 1.3 81.7 - - - +
167B TYR* 1.3 91.9 + - + +
168B ARG* 3.9 0.9 - - - -
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Residues in contact with TYR 167 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
16B PRO 4.0 5.2 + - - -
17B HIS* 2.7 38.1 + - - -
18B ILE* 5.4 0.7 - - + -
163B TYR* 2.8 22.4 + - + +
166B ASP* 1.3 96.1 - - + +
168B ARG* 1.3 73.9 + - - +
170B VAL* 3.0 34.4 + - - +
173B ASP* 3.5 39.4 + - + -
174B TYR* 3.7 31.9 - + + +
177B GLY* 4.4 5.2 - - - -
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Residues in contact with ARG 168 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
21A GLU* 2.7 34.5 + - - -
25A PHE* 3.5 33.7 - - + -
165A ILE* 3.6 24.5 - - - +
168A ARG* 5.8 5.0 - - - +
163B TYR* 3.2 17.2 - - - -
164B TYR* 2.8 78.0 + - + -
165B ILE* 3.1 24.0 + - - +
166B ASP 5.7 0.4 - - - -
167B TYR* 1.3 81.3 - - - +
169B ASN* 1.3 62.1 + - - +
170B VAL* 5.4 0.4 - - + -
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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
------------------------------------------------------------
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