Contacts of the helix formed by residues 228 - 231 (chain D) in PDB entry 4G5S
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 SER 228 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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150D ASP* 3.8 6.6 + - - -
227D LEU* 1.3 78.0 - - - +
229D ASP* 1.3 64.7 + - - +
230D TYR* 3.1 5.7 + - - -
231D ASP* 3.1 9.0 - - - +
270D LYS* 3.3 30.6 + - - +
273D LEU* 3.7 31.2 - - - -
274D PHE* 4.7 4.5 - - - +
277D LYS* 2.7 43.5 + - - +
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Residues in contact with ASP 229 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
42D GLY 5.2 2.3 - - - +
43D GLU* 4.2 9.2 - - - +
150D ASP* 4.8 4.9 - - - +
226D ALA* 3.2 31.5 - - - +
227D LEU 2.8 2.0 + - - -
228D SER* 1.3 87.9 + - - +
230D TYR* 1.3 61.9 + - - +
231D ASP 3.3 2.6 + - - -
232D LEU* 3.8 40.9 + - + +
241D ASN* 5.7 2.1 - - - +
242D ARG* 4.5 21.8 + - + +
243D MET* 4.1 11.7 + - + +
270D LYS* 4.9 1.7 + - - -
277D LYS* 5.3 0.7 + - - -
286D CYS* 5.4 0.2 - - - -
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Residues in contact with TYR 230 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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227D LEU 2.9 18.2 + - - +
228D SER* 3.1 6.1 - - - -
229D ASP* 1.3 81.1 - - - +
231D ASP* 1.3 72.7 + - + +
232D LEU 3.4 2.5 + - - +
241D ASN* 5.6 2.4 + - - +
243D MET* 3.8 13.2 - - + +
274D PHE* 3.9 20.6 - + + -
277D LYS* 2.9 47.1 + - + +
278D ILE* 3.3 11.7 + - + -
281D SER* 2.3 36.3 + - - -
282D PRO 3.2 20.0 - - - -
283D LEU* 4.0 19.1 - - + -
285D ILE* 3.6 12.0 - - + +
286D CYS* 3.5 33.8 - - + +
303D ILE* 5.3 0.7 - - + -
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Residues in contact with ASP 231 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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144D ARG* 3.0 43.3 + - - +
228D SER 3.1 3.8 - - - +
230D TYR* 1.3 97.3 - - + +
232D LEU* 1.3 69.0 + - - +
277D LYS* 2.9 47.3 + - - +
281D SER* 3.7 23.7 + - - -
285D ILE* 4.1 12.5 - - + +
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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