Contacts of the helix formed by residues 5120 - 5124 (chain b) in PDB entry 2AXT
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 LEU5120 (chain b).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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5113b TRP* 4.0 22.7 - - + -
5114b HIS* 4.4 4.9 - - - +
5117b TYR* 3.5 32.3 - - + +
5118b TRP 3.4 3.8 + - - -
5119b ASP* 1.3 78.2 - - - +
5121b GLU* 1.3 54.9 + - - +
5122b LEU* 4.5 4.9 - - + +
5123b PHE* 2.7 65.0 + - + +
5124b ARG* 4.1 2.1 + - - +
5526b CLA 3.6 34.3 - - + -
5002h ALA* 4.9 1.1 - - - -
5003h ARG* 3.5 21.1 - - + +
5005h THR* 4.9 4.0 - - + -
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Residues in contact with GLU5121 (chain b).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5120b LEU* 1.3 66.9 - - - +
5122b LEU* 1.3 55.6 + - - +
5123b PHE 2.7 12.6 + - - -
5124b ARG* 2.9 23.9 + - - +
5126b PRO* 5.4 4.5 - - - +
5002h ALA* 3.8 24.0 - - - +
5003h ARG 3.2 14.7 + - - +
5004h ARG* 3.6 36.1 + - + +
5008h GLY 5.8 0.4 - - - +
5009h ASP* 5.3 1.6 - - - +
5012h ARG* 3.2 33.1 + - - +
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Residues in contact with LEU5122 (chain b).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5120b LEU* 3.0 6.8 + - + +
5121b GLU* 1.3 76.3 - - - +
5123b PHE* 1.3 63.9 + - + +
5124b ARG 3.6 0.4 - - - -
5525b CLA 4.6 7.9 - - + -
5526b CLA 4.3 22.0 - - + -
5004h ARG* 5.5 0.2 - - - +
5008h GLY* 3.7 24.5 - - - +
5011h LEU* 3.3 42.4 - - + +
5012h ARG* 3.4 45.1 + - - +
5015h ASN* 2.8 35.9 - - + +
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Residues in contact with PHE5123 (chain b).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5016b PRO* 3.8 27.9 - - + +
5017b GLY* 3.7 24.7 - - - -
5020b ILE* 3.9 22.0 - - + -
5114b HIS* 5.4 2.9 - - - -
5118b TRP 3.6 17.9 - - - +
5119b ASP* 5.9 1.1 - - - +
5120b LEU* 2.7 48.4 + - + +
5121b GLU 2.7 6.5 + - - -
5122b LEU* 1.3 82.0 - - + +
5124b ARG* 1.3 53.4 + - + -
5131b PRO* 3.5 4.7 - - + +
5132b ALA 2.7 38.6 + - - +
5133b LEU* 4.2 7.2 - - + +
5525b CLA 4.2 9.0 - - + -
5526b CLA 4.0 23.1 - + + -
5015h ASN* 4.1 1.3 - - - -
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Residues in contact with ARG5124 (chain b).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5118b TRP* 4.1 13.5 - - - -
5119b ASP* 2.6 42.8 + - - +
5120b LEU 5.0 1.5 + - - +
5121b GLU* 2.9 10.0 + - - +
5123b PHE* 1.3 83.5 - - + +
5125b ASP* 1.3 61.1 + - - +
5126b PRO* 4.3 0.2 - - - +
5128b THR 5.2 0.2 - - - +
5129b GLY* 3.1 29.4 + - - +
5130b GLU 3.3 4.0 - - - +
5131b PRO* 3.3 35.8 - - + +
5132b ALA 4.5 1.8 - - - -
5002h ALA* 3.9 21.0 - - + +
5012h ARG* 2.4 35.5 + - - -
5015h ASN* 4.8 1.6 - - - +
5005l PRO* 5.8 2.8 - - - +
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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