Contacts of the helix formed by residues 260 - 266 (chain E) in PDB entry 4PCH
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 260 (chain E).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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120D ARG 4.7 0.9 - - - -
121D ALA 4.9 2.0 - - - -
123D GLY* 3.4 10.3 - - - +
119E GLN* 6.4 0.2 - - - -
120E ARG* 3.4 21.9 + - - +
257E PRO* 4.4 6.8 - - - +
258E THR* 3.1 9.0 + - - -
259E LEU* 1.3 79.6 - - - +
261E ALA* 1.3 67.4 + - - +
262E ASP* 2.6 21.5 + - - -
263E TYR* 3.0 15.2 + - - +
264E SER 3.4 7.4 + - - -
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Residues in contact with ALA 261 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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120D ARG* 3.6 36.6 + - + +
123D GLY* 3.6 11.9 - - - -
260E SER* 1.3 73.5 - - - +
262E ASP* 1.3 62.8 + - - +
264E SER* 2.9 24.8 + - - +
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Residues in contact with ASP 262 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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120E ARG* 2.8 26.6 + - - -
260E SER* 2.6 28.1 + - - -
261E ALA* 1.3 74.3 - - - +
263E TYR* 1.3 82.0 + - + -
264E SER 3.5 0.4 + - - -
265E ASN* 5.1 2.8 + - - +
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Residues in contact with TYR 263 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
123D GLY 4.9 0.7 - - - -
120E ARG* 4.5 2.0 - - - -
256E LEU* 4.5 11.8 - - + +
257E PRO* 3.3 60.0 - - + +
258E THR* 4.4 5.4 + - - -
259E LEU 6.1 0.2 - - - -
260E SER 3.0 7.7 + - - +
262E ASP* 1.3 106.9 + - + +
264E SER* 1.3 64.3 + - - +
265E ASN* 3.2 4.0 - - - +
266E GLN* 3.0 56.2 + - + +
267E ARG* 3.8 6.3 + - - +
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Residues in contact with SER 264 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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118D TYR* 6.3 0.7 - - - -
123D GLY* 3.4 34.8 - - - -
63E THR* 5.1 1.2 - - - -
64E MET* 3.6 35.7 - - - +
260E SER 3.4 1.8 + - - -
261E ALA* 2.9 21.7 + - - -
262E ASP 3.5 0.6 - - - -
263E TYR* 1.3 77.6 - - - +
265E ASN* 1.3 59.7 + - - +
266E GLN 3.1 4.6 + - - -
267E ARG* 3.3 16.3 + - - +
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Residues in contact with ASN 265 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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61E PRO* 3.3 21.7 - - - +
63E THR* 5.2 13.4 + - + +
64E MET* 5.6 1.3 - - - +
262E ASP 5.1 2.8 + - - +
263E TYR* 3.2 2.5 - - - +
264E SER* 1.3 80.2 + - - +
266E GLN* 1.3 61.3 + - + +
267E ARG 3.6 0.7 - - - -
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Residues in contact with GLN 266 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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61E PRO* 4.4 7.8 - - + +
251E THR 4.0 3.5 - - - +
252E GLY* 4.7 2.2 - - - -
253E LEU* 3.5 46.1 + - + +
256E LEU* 3.7 16.3 - - - +
257E PRO 4.6 1.6 - - - +
263E TYR* 3.0 45.3 + - + +
265E ASN* 1.3 81.4 - - + +
267E ARG* 1.3 61.1 + - - +
268E THR* 2.9 21.1 + - - -
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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