Contacts of the strand formed by residues 226 - 231 (chain A) in PDB entry 1XPU
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 226 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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68A ALA* 3.5 20.8 - - + +
72A TYR* 2.7 29.3 + - - -
203A VAL* 6.4 0.7 - - + -
204A LEU 3.2 13.2 + - - +
205A MET* 3.3 21.5 - - + +
206A VAL* 3.1 23.0 + - - -
225A GLY* 1.3 68.1 - - - -
227A VAL* 1.3 64.5 + - - +
228A VAL* 3.5 21.2 + - + +
246A VAL* 5.2 0.2 - - - +
249A LYS* 3.6 21.9 + - - +
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Residues in contact with VAL 227 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
68A ALA 4.8 6.4 - - - +
71A SER* 4.5 1.7 + - - -
206A VAL* 3.8 10.5 - - + +
208A LEU* 4.1 15.5 - - + -
219A MET* 3.8 30.3 - - + +
220A GLN* 3.7 42.3 + - + +
223A VAL* 3.8 29.8 - - + +
225A GLY 3.3 12.2 + - - +
226A GLU* 1.3 74.6 - - - +
228A VAL* 1.3 65.5 + - - +
229A ALA* 5.2 0.7 - - + -
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Residues in contact with VAL 228 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
68A ALA 5.4 2.7 - - - +
71A SER* 3.7 25.1 - - - -
72A TYR* 3.9 18.8 - - + -
205A MET* 5.5 3.6 - - + -
206A VAL 3.0 20.2 + - - +
207A LEU* 3.4 7.7 - - + +
208A LEU 3.0 13.7 + - - -
226A GLU* 3.5 36.1 - - + +
227A VAL* 1.3 77.0 - - - +
229A ALA* 1.3 65.4 + - - +
242A VAL* 3.7 18.6 - - + -
246A VAL* 3.9 18.2 - - + -
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Residues in contact with ALA 229 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
71A SER* 2.8 32.8 + - - +
208A LEU* 3.1 29.8 - - + +
216A VAL* 3.7 34.7 - - + +
220A GLN* 5.1 1.8 - - - +
227A VAL* 4.4 0.6 + - + -
228A VAL* 1.3 75.8 - - - +
230A SER* 1.3 59.5 + - - +
231A THR* 4.3 2.5 + - - +
234A GLU* 4.6 0.2 - - - +
238A ARG* 4.4 2.9 + - - -
242A VAL* 4.4 4.9 - - - -
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Residues in contact with SER 230 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
208A LEU 2.8 10.4 + - - +
209A ILE* 3.6 17.2 - - - +
210A ASP 2.9 23.7 + - - -
211A GLU* 3.3 6.9 + - - +
216A VAL* 5.4 0.2 - - - -
229A ALA* 1.3 76.2 - - - +
231A THR* 1.3 60.7 + - - +
234A GLU* 3.2 17.7 - - - -
238A ARG* 4.4 1.6 - - - -
239A HIS* 2.8 34.2 + - - -
242A VAL* 3.9 19.8 - - - +
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Residues in contact with THR 231 (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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211A GLU 3.2 10.3 - - - +
213A PRO* 3.9 32.5 - - + -
216A VAL* 4.5 11.0 - - + -
229A ALA 5.5 1.6 - - - +
230A SER* 1.3 74.6 - - - +
232A PHE* 1.3 66.7 + - - +
233A ASP* 2.8 24.9 + - - -
234A GLU* 3.1 29.5 + - - +
239A HIS* 3.2 16.8 - - - -
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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