Contacts of the helix formed by residues 1078 - 1082 (chain A) in PDB entry 5XRA
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 LEU1078 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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1047A PHE* 4.5 12.1 - - + -
1055A LEU* 4.7 9.2 - - + -
1071A PHE* 6.1 0.9 - - + -
1074A LEU* 3.9 25.4 - - + +
1075A PHE* 3.4 31.9 - - + +
1076A ASP 3.4 3.0 + - - -
1077A SER* 1.3 77.4 - - - +
1079A GLU* 1.3 67.0 + - - +
1081A THR* 2.4 38.4 + - + +
1082A GLY 4.0 1.2 + - - -
1083A ALA* 4.3 5.1 + - + -
1108A ILE* 5.1 9.9 - - + +
1111A LYS* 4.0 28.9 - - + -
1112A LEU* 5.0 5.8 - - + +
1115A LEU* 3.7 20.6 - - + +
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Residues in contact with GLU1079 (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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1075A PHE 5.5 0.2 - - - +
1076A ASP 2.8 26.3 - - - +
1077A SER* 4.0 1.7 - - - -
1078A LEU* 1.3 80.6 + - - +
1080A GLU* 1.3 74.6 + - + +
1081A THR 3.4 0.7 + - - -
1082A GLY* 3.5 9.5 + - - -
1083A ALA 5.0 0.6 + - - +
1115A LEU* 3.8 21.7 - - + +
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Residues in contact with GLU1080 (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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1043A ALA* 3.8 9.1 - - - +
1044A GLY* 3.5 15.3 + - - +
1045A GLY 3.2 16.5 + - - -
1077A SER* 3.0 38.4 + - - +
1079A GLU* 1.3 84.8 - - + +
1081A THR* 1.3 60.2 + - - +
1082A GLY* 3.1 6.7 + - - -
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Residues in contact with THR1081 (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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1043A ALA 3.1 21.8 - - - +
1045A GLY* 4.2 4.7 - - - -
1046A LEU* 3.9 11.1 + - + +
1047A PHE* 3.1 51.7 + - + +
1048A GLU 4.7 1.2 + - - -
1074A LEU* 3.8 26.2 - - + -
1077A SER 3.5 13.9 - - - +
1078A LEU* 2.4 29.6 + - + +
1080A GLU* 1.3 75.9 - - - +
1082A GLY* 1.3 62.4 + - - +
1083A ALA* 3.7 3.5 + - - +
1086A ARG* 5.0 0.2 + - - -
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Residues in contact with GLY1082 (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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1045A GLY* 5.8 0.4 - - - -
1079A GLU 3.5 8.5 + - - -
1080A GLU 3.1 7.0 + - - -
1081A THR* 1.3 78.0 + - - +
1083A ALA* 1.3 64.3 + - - +
1084A GLN* 3.1 8.5 + - - +
1086A ARG* 3.2 23.8 + - - +
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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