Contacts of the helix formed by residues 42 - 49 (chain D) in PDB entry 4ZIA
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 ASP 42 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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40D SER 4.3 0.2 + - - -
41D GLN* 1.3 73.5 + - - +
43D TRP* 1.3 56.2 + - - +
44D ALA* 3.5 8.3 + - - +
45D TYR* 2.9 37.3 + - + +
46D ALA* 2.9 26.9 + - - +
52D HIS* 3.9 16.3 + - - +
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Residues in contact with TRP 43 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26D PHE* 5.8 0.9 - + - -
37D TRP* 3.7 27.4 - + - -
38D ILE* 2.8 32.1 + - + +
41D GLN* 3.4 24.2 + - + +
42D ASP* 1.3 70.2 - - - +
44D ALA* 1.3 61.3 + - - +
46D ALA* 3.6 3.9 - - + +
47D ALA* 2.8 32.4 + - - +
56D VAL* 3.7 24.9 - - + -
57D PHE* 6.2 0.7 - - - -
60D LEU* 4.6 14.4 - - + -
101D ILE* 5.2 4.0 - - + -
102D ALA* 3.7 25.6 - - + +
105D VAL* 3.4 42.5 - - + +
106D ALA* 3.8 23.0 - - + +
109D LEU* 3.7 18.8 - - + -
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Residues in contact with ALA 44 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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42D ASP* 3.3 6.2 + - - +
43D TRP* 1.3 80.7 - - - +
45D TYR* 1.3 65.0 + - - +
47D ALA* 3.2 13.5 + - - +
48D SER* 3.4 12.3 + - - -
106D ALA* 4.2 9.4 - - + +
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Residues in contact with TYR 45 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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42D ASP* 2.9 34.6 + - + +
44D ALA* 1.3 78.0 - - - +
46D ALA* 1.3 61.9 + - - +
48D SER* 2.9 25.7 + - - -
49D LYS* 2.9 46.5 + - + +
51D SER* 5.2 0.5 + - - -
52D HIS* 3.6 41.7 - + + -
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Residues in contact with ALA 46 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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42D ASP 2.9 17.0 + - - +
43D TRP* 3.6 10.5 - - + +
45D TYR* 1.3 76.0 - - - +
47D ALA* 1.3 61.2 + - - +
48D SER 3.2 0.9 + - - -
49D LYS 3.3 8.3 + - - +
52D HIS* 3.8 20.6 - - + -
53D ALA* 3.1 40.8 - - - +
56D VAL* 4.2 9.6 - - + -
99D MET* 3.9 1.7 - - - +
102D ALA* 3.9 11.9 - - + -
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Residues in contact with ALA 47 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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43D TRP 2.8 20.9 + - - +
44D ALA* 3.5 9.2 - - - +
45D TYR 3.2 0.4 - - - -
46D ALA* 1.3 73.6 - - - +
48D SER* 1.3 57.8 + - - +
99D MET* 3.4 10.1 - - - +
102D ALA* 3.9 8.0 - - - +
103D ARG* 3.0 59.3 + - + +
106D ALA* 5.0 2.5 - - + -
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Residues in contact with SER 48 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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44D ALA 3.4 8.5 + - - -
45D TYR* 2.9 26.2 + - - -
47D ALA* 1.3 77.6 - - - +
49D LYS* 1.3 58.7 + - - +
50D GLU 4.1 0.2 + - - -
99D MET* 3.2 16.1 - - - +
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Residues in contact with LYS 49 (chain D).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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45D TYR* 2.9 51.2 + - + +
46D ALA 3.3 5.7 + - - +
48D SER* 1.3 80.0 - - - +
50D GLU* 1.3 67.4 + - - +
51D SER* 2.8 35.5 + - - +
52D HIS* 2.9 14.5 + - + +
53D ALA 3.0 9.9 + - - -
99D MET* 3.4 0.2 - - - +
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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