Contacts of the helix formed by residues 39 - 46 (chain A) in PDB entry 2D8Q
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 CYS 39 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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27A LYS* 4.6 11.9 - - - -
37A TYR* 3.5 4.3 - - - +
38A CYS* 1.3 98.6 - - - +
40A ARG* 1.3 87.0 + - - +
41A GLU* 3.1 19.0 + - + +
42A CYS* 3.3 11.7 + - - +
43A GLN* 3.4 10.7 + - - +
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Residues in contact with ARG 40 (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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27A LYS* 4.6 11.4 - - - +
39A CYS* 1.3 93.5 - - - +
41A GLU* 1.3 82.3 + - + +
43A GLN* 3.1 21.0 + - - +
44A VAL* 3.0 32.2 + - + +
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Residues in contact with GLU 41 (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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38A CYS* 6.1 0.2 - - - -
39A CYS* 3.1 13.6 - - + +
40A ARG* 1.3 98.0 + - + +
42A CYS* 1.3 64.9 + - - +
44A VAL* 3.5 5.9 + - - +
45A LYS* 3.0 41.4 + - - +
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Residues in contact with CYS 42 (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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18A CYS* 3.6 11.4 - - - -
20A TYR* 3.6 25.8 - - + -
21A CYS* 4.0 6.3 - - - -
37A TYR* 4.5 3.4 - - + -
38A CYS* 3.8 4.9 - - - -
39A CYS 3.3 5.6 + - - +
40A ARG 3.2 0.4 - - - -
41A GLU* 1.3 78.4 - - - +
43A GLN* 1.3 69.3 + - - +
45A LYS* 2.7 25.7 + - - +
46A HIS* 2.8 15.8 + - - +
201A ZN 2.3 36.8 - - - -
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Residues in contact with GLN 43 (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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27A LYS* 4.3 13.0 + - - +
29A CYS* 4.0 33.7 - - - +
30A SER* 4.4 5.7 - - - +
31A ARG* 5.8 0.4 - - - +
37A TYR* 4.4 31.3 - - + -
39A CYS 3.4 5.9 + - - +
40A ARG* 3.1 29.1 + - - +
42A CYS* 1.3 78.7 - - - +
44A VAL* 1.3 66.5 + - + +
46A HIS 3.5 2.1 - - - +
47A TRP* 3.1 46.3 + - + +
50A HIS* 5.8 2.5 - - + -
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Residues in contact with VAL 44 (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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40A ARG* 3.0 20.6 + - + +
41A GLU* 3.8 8.1 - - - +
43A GLN* 1.3 77.8 - - + +
45A LYS* 1.3 68.1 + - + +
47A TRP* 3.0 23.5 - - + +
48A GLU 4.5 0.7 + - - -
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Residues in contact with LYS 45 (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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20A TYR* 3.5 41.7 - - + +
41A GLU* 3.0 45.9 + - - +
42A CYS* 2.7 17.5 + - - +
44A VAL* 1.3 77.4 - - + +
46A HIS* 1.3 58.0 + - - +
47A TRP 3.0 5.4 + - - -
48A GLU* 4.1 17.3 + - - +
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Residues in contact with HIS 46 (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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19A ALA* 3.5 25.7 - - + +
20A TYR* 4.2 18.4 - - + -
35A GLU* 5.5 3.4 - - - -
37A TYR* 3.0 33.0 + - + -
42A CYS 2.8 15.6 + - - +
43A GLN 3.5 4.9 - - - +
45A LYS* 1.3 70.5 - - - +
47A TRP* 1.3 57.1 + - - +
48A GLU* 3.6 3.8 - - + +
49A LYS* 3.5 44.2 - - + +
50A HIS* 3.1 27.6 + - + +
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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