Contacts of the helix formed by residues 233 - 239 (chain A) in PDB entry 1FX8
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 PHE 233 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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207A ASP* 4.8 0.9 - - - +
208A PHE* 4.2 14.9 - + + -
211A LYS* 3.6 31.2 - - + +
224A PHE* 2.9 40.3 + + + +
231A PRO* 3.8 19.3 - - + -
232A TYR* 1.3 71.4 - - - +
234A LEU* 1.3 88.7 + - + +
235A VAL 3.2 0.2 - - - -
236A PRO* 3.2 13.2 - - - +
237A LEU* 3.3 33.9 + - + +
474A BOG 3.7 56.5 - - + -
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Residues in contact with LEU 234 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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145A PHE* 3.8 19.7 - - + -
149A PHE* 4.9 1.2 - - - -
230A ILE* 4.9 2.7 - - + -
231A PRO* 3.7 31.2 - - + +
232A TYR 2.7 5.3 + - - -
233A PHE* 1.3 106.2 - - + +
235A VAL* 1.3 56.0 + - - +
237A LEU* 3.2 2.8 + - + -
238A PHE* 2.9 60.8 + - + +
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Residues in contact with VAL 235 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
145A PHE* 3.5 48.0 - - + +
148A ALA 3.6 25.4 - - - +
149A PHE* 3.7 18.2 - - + +
152A GLU* 3.8 13.9 - - + -
232A TYR* 2.8 29.7 + - + +
234A LEU* 1.3 72.1 - - - +
236A PRO* 1.3 64.4 - - + +
237A LEU 3.0 4.7 - - - -
239A GLY 2.8 27.4 + - - -
240A PRO* 3.2 4.3 - - - +
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Residues in contact with PRO 236 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
137A THR* 3.6 15.0 - - - +
152A GLU* 4.9 2.0 - - + +
201A ALA* 4.0 11.9 - - + -
203A ASN 4.2 1.2 - - - -
204A PRO* 3.5 17.4 - - - +
207A ASP* 3.3 37.5 - - + +
232A TYR* 3.0 37.5 - - + +
233A PHE 3.2 8.7 - - - +
235A VAL* 1.3 89.3 - - + +
237A LEU* 1.3 56.2 + - - +
240A PRO* 3.2 25.1 - - + +
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Residues in contact with LEU 237 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
204A PRO* 3.4 27.4 - - + +
208A PHE* 4.3 18.2 - - + -
233A PHE* 3.3 40.6 + - + +
234A LEU* 3.2 4.9 + - + +
235A VAL 3.0 0.4 - - - -
236A PRO* 1.3 79.9 - - - +
238A PHE* 1.3 90.1 + - + +
240A PRO* 4.0 0.4 - - - +
241A ILE* 3.3 24.7 - - + +
474A BOG 3.7 41.1 - - + -
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Residues in contact with PHE 238 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
149A PHE* 4.0 14.8 - + + -
234A LEU* 2.9 53.2 + - + +
237A LEU* 1.3 96.7 - - + +
239A GLY* 1.3 68.9 + - - +
240A PRO 3.2 2.0 - - - -
241A ILE* 3.1 16.4 + - + +
242A VAL* 2.8 31.6 + - + +
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Residues in contact with GLY 239 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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149A PHE* 3.5 29.4 - - - -
152A GLU* 4.4 8.3 - - - -
153A MET* 3.6 14.1 - - - -
235A VAL 2.8 18.9 + - - -
238A PHE* 1.3 72.3 - - - +
240A PRO* 1.3 59.1 - - - +
242A VAL* 3.4 2.1 + - - +
243A GLY* 3.0 25.3 + - - -
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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