Contacts of the helix formed by residues 51 - 59 (chain A) in PDB entry 3QJQ
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 ALA 51 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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41A PHE* 3.3 30.8 + - + -
44A LEU* 3.8 31.1 - - + +
49A VAL* 3.6 8.6 + - + +
50A ASP* 1.3 73.4 - - - +
52A TYR* 1.3 64.3 + - - +
53A PRO* 3.6 1.6 - - - -
54A LEU* 3.4 14.4 - - + +
55A LEU 3.3 9.2 + - - -
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Residues in contact with TYR 52 (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 PHE* 4.2 4.8 + + - +
41A PHE* 3.2 31.4 - - + +
42A GLN* 3.0 36.2 + - - +
45A ASN* 4.4 3.6 - - + -
50A ASP* 3.0 10.1 + - - -
51A ALA* 1.3 78.9 - - - +
53A PRO* 1.4 59.8 - - + +
54A LEU 3.0 1.6 - - - -
55A LEU* 3.4 29.8 - - + +
56A LYS* 2.7 41.5 + - + +
62A VAL* 5.1 4.0 - - + -
64A SER 4.8 3.8 - - - -
65A TYR* 3.2 46.6 + + - -
68A GLY* 5.8 0.4 - - - -
452A TYR* 3.3 29.4 - + + +
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Residues in contact with PRO 53 (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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50A ASP* 3.3 29.4 - - - +
51A ALA 4.7 0.4 - - - -
52A TYR* 1.4 87.8 - - + +
54A LEU* 1.3 56.0 + - - +
56A LYS* 3.8 5.6 - - + +
57A ARG* 3.1 29.5 + - - +
452A TYR* 4.4 1.8 - - - +
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Residues in contact with LEU 54 (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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41A PHE* 3.7 22.7 - - + -
51A ALA* 3.4 17.1 + - + +
52A TYR 3.0 0.6 - - - -
53A PRO* 1.3 74.9 - - - +
55A LEU* 1.3 72.1 + - - +
56A LYS 3.1 0.7 - - - -
57A ARG* 2.8 24.0 + - - +
58A LEU* 2.7 45.4 + - + +
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Residues in contact with LEU 55 (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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37A LEU* 5.3 1.8 - - + +
38A PHE* 3.9 24.2 - - + -
41A PHE* 3.5 50.5 - - + -
51A ALA 3.3 2.4 + - - +
52A TYR* 3.2 40.2 + - + +
54A LEU* 1.3 80.9 - - - +
56A LYS* 1.3 55.9 + - - +
58A LEU* 3.1 5.3 + - + -
59A LEU* 2.6 64.0 + - + +
62A VAL* 4.5 11.7 - - + -
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Residues in contact with LYS 56 (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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52A TYR* 2.7 25.8 + - + +
53A PRO* 3.8 6.7 - - + +
55A LEU* 1.3 74.5 - - - +
57A ARG* 1.3 59.7 + - - +
59A LEU 2.6 23.6 - - - +
60A PRO* 3.3 13.9 + - - +
62A VAL* 3.3 33.0 - - + +
63A GLN* 4.1 26.1 + - - +
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Residues in contact with ARG 57 (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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53A PRO 3.1 19.8 + - - +
54A LEU* 2.8 20.3 + - - +
56A LYS* 1.3 78.9 - - - +
58A LEU* 1.3 68.9 + - - +
60A PRO* 4.4 8.5 - - - +
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Residues in contact with LEU 58 (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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41A PHE* 5.3 7.9 - - + -
54A LEU* 2.7 43.1 + - + +
55A LEU* 3.7 6.1 - - + +
57A ARG* 1.3 83.2 - - - +
59A LEU* 1.3 65.6 + - + +
60A PRO* 3.7 7.7 - - - +
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Residues in contact with LEU 59 (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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37A LEU* 4.3 24.9 - - + -
38A PHE* 4.6 11.2 - - + -
55A LEU* 2.6 37.6 + - + +
56A LYS* 2.6 22.3 - - - +
58A LEU* 1.3 79.2 - - + +
60A PRO* 1.4 66.2 - - + +
61A PHE* 3.3 35.6 + - + -
62A VAL* 3.7 17.4 + - + +
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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