Contacts of the helix formed by residues 87 - 91 (chain A) in PDB entry 2Z3Q
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 87 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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38A THR* 5.5 1.6 - - - -
42A CYS* 4.8 0.2 - - - -
85A CYS 5.0 3.1 - - - +
86A LYS* 1.3 79.9 - - - +
88A CYS* 1.3 67.7 + - - +
89A GLU* 3.1 11.0 - - - +
90A GLU* 3.1 29.9 + - - +
91A LEU* 4.0 3.6 + - - +
64B ILE* 5.7 2.1 - - - +
67B PRO* 3.2 24.6 - - + +
70B VAL* 5.8 0.9 - - - +
71B HIS* 2.7 33.9 + - - +
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Residues in contact with CYS 88 (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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26A TYR* 3.2 13.4 - - + -
38A THR* 5.8 0.9 - - - -
41A LYS* 5.0 0.9 - - - -
42A CYS* 2.1 58.5 - - + -
45A LEU* 4.4 9.0 - - - -
87A GLU* 1.3 74.1 - - - +
89A GLU* 1.3 61.5 + - - +
90A GLU 3.1 0.2 - - - -
91A LEU* 3.1 30.2 + - + +
37B ALA* 3.5 29.4 - - + -
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Residues in contact with GLU 89 (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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26A TYR* 3.7 20.2 - - + +
87A GLU* 3.1 11.3 + - - +
88A CYS* 1.3 84.4 + - - +
90A GLU* 1.3 59.5 + - - +
91A LEU 3.2 5.1 + - - +
34B LYS* 4.0 29.3 - - + +
35B ARG 3.3 24.2 - - - +
36B LYS* 3.7 6.4 - - - +
37B ALA* 2.8 28.7 + - - +
64B ILE* 3.6 24.8 - - + +
66B ASP* 4.5 0.9 - - - +
67B PRO* 3.8 21.4 - - + +
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Residues in contact with GLU 90 (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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85A CYS 4.9 0.7 - - - +
86A LYS* 3.8 29.6 + - + +
87A GLU* 3.1 39.1 + - - +
89A GLU* 1.3 78.9 - - - +
91A LEU* 1.3 61.6 + - - +
92A GLU 4.0 0.7 + - - -
66B ASP* 5.4 1.3 - - - -
67B PRO* 3.7 26.4 - - + +
68B ALA* 4.2 18.1 + - + +
71B HIS* 4.2 9.8 - - - -
72B GLN* 5.2 2.3 - - - +
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Residues in contact with LEU 91 (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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26A TYR* 3.4 27.7 - - + +
27A THR 3.9 7.0 - - - +
28A GLU* 3.3 53.8 - - + +
39A ALA* 6.0 1.1 - - - -
42A CYS* 4.1 18.8 - - + -
43A PHE* 6.3 0.4 - - + -
86A LYS* 3.6 25.1 - - + +
87A GLU 4.1 2.5 - - - +
88A CYS* 3.1 29.9 + - - +
89A GLU 4.2 1.2 - - - +
90A GLU* 1.3 82.1 - - - +
92A GLU* 1.3 71.0 + - - +
93A GLU* 3.6 1.6 + - - +
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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