Contacts of the helix formed by residues 20 - 29 (chain 1) in PDB entry 4E2I
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 GLU 20 (chain 1).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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181 ASP* 5.4 1.2 + - - -
191 CYS* 1.3 77.6 - - - +
211 GLU* 1.3 67.1 + - - +
221 ALA* 3.8 20.7 + - - +
231 LEU* 3.0 35.3 + - + +
241 ILE* 3.0 11.0 + - - +
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Residues in contact with GLU 21 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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201 GLU* 1.3 75.4 - - - +
221 ALA* 1.3 60.5 + - - +
241 ILE* 4.2 8.5 - - + +
251 GLU* 3.1 41.7 + - - +
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Residues in contact with ALA 22 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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201 GLU* 3.1 20.8 + - + +
211 GLU* 1.3 79.3 - - - +
231 LEU* 1.3 63.8 + - + +
251 GLU* 3.8 9.0 + - - +
261 LYS* 3.4 19.8 + - - +
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Residues in contact with LEU 23 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
181 ASP* 4.3 1.6 - - - +
191 CYS* 3.5 27.6 - - + -
201 GLU* 3.0 37.1 + - + +
221 ALA* 1.3 77.7 - - + +
241 ILE* 1.3 63.9 + - - +
261 LYS* 3.0 23.0 - - + +
271 LEU* 3.1 15.3 - - + +
571 LEU 3.9 17.5 - - - +
581 THR* 3.6 22.7 - - - +
591 SER* 3.4 27.1 - - - +
621 LEU* 5.4 2.8 - - + +
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Residues in contact with ILE 24 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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51 ALA* 3.5 35.0 - - + +
81 LEU* 4.6 5.1 - - + +
91 ALA* 3.8 23.8 - - + +
121 LEU* 3.8 16.8 - - + -
191 CYS* 3.2 29.6 - - + +
201 GLU 3.0 15.2 + - - +
211 GLU* 4.2 7.4 - - + +
231 LEU* 1.3 75.8 - - - +
251 GLU* 1.3 61.7 + - - +
261 LYS 3.1 0.2 - - - -
271 LEU* 3.3 16.8 + - - +
281 VAL* 3.3 13.2 + - - +
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Residues in contact with GLU 25 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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51 ALA* 4.4 13.7 - - + -
211 GLU* 3.1 32.4 + - + +
221 ALA* 4.1 8.8 - - - +
231 LEU 3.3 0.2 - - - -
241 ILE* 1.3 75.3 - - - +
261 LYS* 1.3 63.0 + - - +
271 LEU 3.2 0.2 - - - -
281 VAL* 3.4 23.6 + - + +
291 GLU* 3.7 12.6 + - - +
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Residues in contact with LYS 26 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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221 ALA 3.4 12.3 + - - +
231 LEU* 3.0 19.7 + - + +
241 ILE 3.1 0.4 - - - -
251 GLU* 1.3 80.5 - - - +
271 LEU* 1.3 61.0 + - + +
291 GLU* 3.6 31.7 + - - +
301 LEU* 4.0 6.9 + - + +
591 SER* 4.8 13.2 - - - +
621 LEU* 3.2 36.8 + - + +
631 ASN* 3.4 27.7 + - - +
661 GLU* 3.1 25.5 + - - +
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Residues in contact with LEU 27 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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81 LEU* 3.6 32.1 - - + -
121 LEU* 5.8 5.4 - - + -
191 CYS* 5.7 4.9 - - - -
231 LEU* 3.1 20.9 - - + +
241 ILE* 3.3 7.8 + - - +
251 GLU 3.2 0.2 - - - -
261 LYS* 1.3 77.6 - - + +
281 VAL* 1.3 65.5 + - - +
291 GLU 3.0 2.7 - - - -
301 LEU* 3.0 43.9 + - + +
311 CYS* 3.3 12.0 - - - -
411 MET* 4.6 8.0 - - + +
421 VAL* 6.5 0.2 - - - -
451 LEU* 4.1 12.8 - - + -
621 LEU* 3.6 37.7 - - + -
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Residues in contact with VAL 28 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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21 SER* 4.0 12.3 - - - -
31 ALA* 3.6 28.9 - - + +
41 SER 4.4 1.8 - - - +
51 ALA* 3.6 28.0 - - + +
81 LEU* 4.8 4.0 - - + -
241 ILE 3.3 17.3 - - - +
251 GLU* 3.4 20.0 - - + +
261 LYS 3.3 0.2 - - - -
271 LEU* 1.3 79.2 - - - +
291 GLU* 1.3 59.1 + - + +
311 CYS* 3.3 14.6 + - - +
321 VAL* 3.2 19.3 - - + +
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Residues in contact with GLU 29 (chain 1).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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251 GLU 3.7 13.7 - - - +
261 LYS* 3.6 31.6 - - - +
271 LEU 3.0 0.2 - - - -
281 VAL* 1.3 77.4 - - + +
301 LEU* 1.3 53.4 + - - +
311 CYS 3.1 0.4 - - - -
321 VAL* 3.0 7.7 + - - +
331 GLN* 2.8 49.0 + - + +
661 GLU* 5.4 5.9 - - - +
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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