Contacts of the helix formed by residues 102 - 106 (chain B) in PDB entry 2QJK
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 LEU 102 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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77A PHE* 3.6 36.8 - - + -
81A GLU* 3.4 40.8 - - + +
85A ARG* 4.6 0.7 - - - +
280A TYR* 3.7 36.1 - - + +
44B PHE* 4.1 10.5 - - + -
99B ASP 4.6 2.0 + - - -
101B SER* 1.3 83.5 - - - +
103B MET* 1.3 67.4 + - - +
104B ALA 3.3 2.2 - - - -
105B LYS* 2.8 31.0 + - - +
106B ALA* 3.0 9.7 + - - +
219B ALA* 3.7 10.1 - - - +
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Residues in contact with MET 103 (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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281A ILE* 5.8 1.3 - - - -
98B PRO* 3.7 21.3 - - + -
99B ASP 4.7 5.0 + - - +
100B LEU* 3.3 32.8 + - + +
102B LEU* 1.3 74.8 - - - +
104B ALA* 1.3 56.1 + - - +
106B ALA* 2.6 33.0 + - - +
107B ARG* 3.3 46.6 + - + +
131B ILE* 3.6 24.2 - - + -
215B LEU* 5.5 1.8 - - + -
219B ALA* 4.6 0.2 - - - +
301B HEM 3.1 49.8 - - + -
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Residues in contact with ALA 104 (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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102B LEU 3.1 1.0 + - - -
103B MET* 1.3 75.9 - - - +
105B LYS* 1.3 57.2 + - - +
107B ARG 4.2 0.9 - - - +
125B ILE* 5.8 1.9 - - - +
127B GLY* 3.3 25.9 + - - -
128B PRO* 3.9 12.8 - - + +
131B ILE* 3.7 18.2 - - + +
212B SER 5.4 0.2 - - - +
215B LEU 4.0 7.0 + - - +
216B MET* 3.8 44.7 - - + +
219B ALA* 4.7 4.1 - - + +
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Residues in contact with LYS 105 (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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81A GLU* 4.5 5.3 + - - -
84A MET* 3.6 15.8 - - - +
95A TYR* 3.1 17.3 + - - +
272A ASN* 3.3 22.7 - - + +
277A PRO* 3.9 13.0 - - - +
280A TYR* 3.2 56.7 + - + +
102B LEU* 2.8 19.1 + - - +
103B MET 2.8 1.0 + - - -
104B ALA* 1.3 73.0 - - - +
106B ALA* 1.3 60.3 + - - +
107B ARG 3.3 7.2 + - - +
125B ILE* 5.2 4.2 - - - +
216B MET* 5.9 4.5 - - + -
219B ALA* 3.8 17.5 + - + +
220B GLU* 3.6 29.7 + - + -
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Residues in contact with ALA 106 (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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277A PRO* 3.4 28.0 - - - +
278A ASP* 4.5 3.6 - - - +
280A TYR* 4.0 13.2 - - + +
281A ILE* 4.3 13.0 - - + +
102B LEU 3.0 11.9 + - - +
103B MET* 2.6 16.0 + - - +
105B LYS* 1.3 78.7 - - - +
107B ARG* 1.3 82.9 + - + +
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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