Contacts of the helix formed by residues 22 - 26 (chain B) in PDB entry 2W3S
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 22 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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36A LYS* 3.7 12.8 - - - -
103A CYS 2.5 29.6 + - - -
104A GLY* 3.4 14.5 - - - -
105A PHE* 3.8 28.9 - + + -
15B HIS* 3.9 10.4 - - - -
20B ALA* 3.3 20.8 - - + +
21B ARG* 1.3 74.5 - - - +
23B LEU* 1.3 59.0 + - - +
24B ASP 3.3 2.9 - - - +
25B ASP* 2.7 46.8 + - - +
26B LEU* 3.4 8.6 + - - +
177B GLU* 3.6 12.8 - - + +
223B ARG* 3.5 27.5 - - + -
224B MET 3.9 2.2 - - - -
225B GLY* 3.4 32.5 - - - -
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Residues in contact with LEU 23 (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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22B TYR* 1.3 75.1 - - - +
24B ASP* 1.3 63.6 + - + +
25B ASP 3.1 1.4 + - - -
26B LEU* 3.3 27.0 + - + +
177B GLU* 3.8 10.5 + - - +
180B ALA* 3.7 20.2 - - + +
181B ALA* 3.5 34.3 - - - +
182B LEU* 3.9 4.9 - - + +
193B HIS* 3.1 39.3 - - + +
194B CYS* 3.2 21.3 - - - +
195B SER 4.7 4.0 - - - +
223B ARG 5.4 1.6 + - - -
254B LYS* 3.9 20.8 + - + +
255B MET 5.0 0.2 - - - +
256B ARG* 5.6 0.2 - - + -
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Residues in contact with ASP 24 (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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28A ARG* 3.3 33.3 + - - +
33A THR* 5.1 0.2 + - - -
37A GLU* 6.2 0.2 - - - +
22B TYR* 3.3 2.4 - - - +
23B LEU* 1.3 83.5 - - + +
25B ASP* 1.3 59.3 + - - +
26B LEU 4.7 0.7 - - - +
177B GLU* 5.3 0.4 + - - +
180B ALA* 5.2 2.1 - - + +
254B LYS* 2.9 42.0 + - + +
256B ARG* 3.5 38.5 + - + -
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Residues in contact with ASP 25 (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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28A ARG* 2.5 40.2 + - - -
33A THR* 3.4 30.4 + - + +
36A LYS* 2.5 28.9 + - - +
105A PHE* 6.0 0.8 - - - -
21B ARG* 3.6 12.1 + - + +
22B TYR* 2.7 35.9 + - - +
24B ASP* 1.3 81.2 - - - +
26B LEU* 1.3 63.9 + - - +
27B PRO* 3.3 5.2 - - - +
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Residues in contact with LEU 26 (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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21B ARG* 4.2 30.1 - - + +
22B TYR 3.4 7.8 + - - +
23B LEU* 3.3 25.2 + - + +
24B ASP 4.7 2.3 - - - +
25B ASP* 1.3 77.6 - - - +
27B PRO* 1.3 79.6 - - + +
28B CYS* 3.6 10.4 + - - -
182B LEU* 4.3 12.5 - - + +
193B HIS* 4.1 39.0 - - + +
254B LYS* 5.0 2.4 + - - -
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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