Contacts of the helix formed by residues 221 - 225 (chain N) in PDB entry 2DYS
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 ASP 221 (chain N).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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212N ASP* 4.0 4.9 + - - +
217N THR 5.0 1.4 - - - +
218N THR* 3.5 32.0 + - + +
219N PHE 3.5 2.2 - - - -
220N PHE* 1.3 76.9 - - - +
222N PRO* 1.4 65.4 - - - +
223N ALA* 3.2 24.1 + - - +
224N GLY 3.0 6.8 + - - -
226N GLY* 2.7 25.4 + - - -
55T ILE* 5.2 0.2 - - - +
57T THR* 4.1 19.6 - - - +
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Residues in contact with PRO 222 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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131N PRO* 5.9 2.0 - - + -
220N PHE 3.6 9.4 - - - +
221N ASP* 1.4 88.5 - - - +
223N ALA* 1.3 54.1 + - - +
225N GLY 2.6 21.5 + - - -
226N GLY 3.4 13.4 - - - +
228N PRO* 4.1 16.2 - - + -
176O PRO* 3.4 31.9 - - + +
177O GLY* 4.2 11.0 - - - -
109P THR* 6.1 0.7 - - + -
111P GLU* 3.0 36.4 - - - +
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Residues in contact with ALA 223 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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221N ASP* 3.1 18.1 + - - +
222N PRO* 1.3 77.8 - - - +
224N GLY* 1.3 56.1 + - - +
111P GLU* 3.9 12.3 - - - +
51T HIS 3.9 6.4 - - - +
52T HIS* 3.2 26.8 - - - +
55T ILE* 4.6 9.6 - - + -
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Residues in contact with GLY 224 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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218N THR* 3.3 27.1 - - - +
221N ASP 3.0 6.0 + - - -
223N ALA* 1.3 78.1 - - - +
225N GLY* 1.3 59.4 + - - +
226N GLY 3.4 2.0 - - - -
112P LEU* 3.4 14.7 - - - +
191P GLY* 3.5 9.3 - - - -
192P VAL* 2.9 23.2 + - - +
52T HIS* 4.1 7.6 - - - +
55T ILE* 4.3 2.0 - - - -
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Residues in contact with GLY 225 (chain N).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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222N PRO 2.6 17.8 + - - -
223N ALA 3.3 0.8 + - - -
224N GLY* 1.3 74.5 - - - +
226N GLY* 1.3 61.2 + - - +
104P SER* 4.4 7.8 + - - +
109P THR* 3.1 32.3 + - - +
111P GLU* 4.3 1.5 - - - +
112P LEU* 3.8 15.2 - - - +
192P VAL* 3.7 15.0 - - - +
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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