Contacts of the helix formed by residues 63 - 67 (chain U) in PDB entry 4E2I
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 ASN 63 (chain U).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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26U LYS* 3.4 18.7 + - - +
59U SER 3.1 21.6 + - - +
60U GLU* 3.0 8.9 + - - +
62U LEU* 1.3 78.3 - - - +
64U SER* 1.3 61.0 + - - +
65U PHE 2.9 9.7 + - - -
66U GLU* 3.2 12.3 + - - +
67U HIS* 3.2 38.7 + - - -
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Residues in contact with SER 64 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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48U PHE* 3.3 20.8 - - - -
60U GLU* 2.8 26.8 + - - +
61U ILE* 3.7 2.1 + - - -
63U ASN* 1.3 77.1 + - - +
65U PHE* 1.3 57.1 + - - +
66U GLU 3.3 0.2 - - - -
67U HIS* 3.4 12.0 + - - -
68U GLU* 3.1 38.0 + - - +
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Residues in contact with PHE 65 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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30U LEU* 3.7 16.8 - - + -
41U MET* 3.7 20.2 - - + -
44U GLU* 3.3 41.7 - - + -
45U LEU* 3.6 24.9 - - + -
48U PHE* 3.5 39.2 - + + -
61U ILE 3.7 1.5 + - - +
62U LEU 3.7 14.4 - - - +
63U ASN 2.9 0.4 - - - -
64U SER* 1.3 78.8 - - - +
66U GLU* 1.3 57.5 + - - +
67U HIS 3.1 2.7 + - - -
69U PHE* 3.4 23.3 + + + -
70U LEU* 3.3 49.2 + - + +
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Residues in contact with GLU 66 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26U LYS* 3.1 28.4 + - - +
29U GLU* 5.4 4.4 - - - +
30U LEU* 3.5 40.7 + - + +
33U GLN* 4.6 10.5 - - - +
34U TYR* 3.8 26.7 + - - +
62U LEU 4.8 0.9 - - - +
63U ASN* 3.2 10.5 + - - +
65U PHE* 1.3 76.0 - - - +
67U HIS* 1.3 70.9 + - + +
68U GLU 3.7 0.2 - - - -
70U LEU* 4.3 3.4 - - - -
71U SER* 3.1 20.4 - - - -
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Residues in contact with HIS 67 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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63U ASN* 3.2 46.4 + - - -
64U SER* 3.4 10.0 + - - +
65U PHE 3.1 0.4 - - - -
66U GLU* 1.3 91.3 + - + +
68U GLU* 1.3 71.3 + - + +
71U SER* 3.0 17.5 + - - -
72U LYS* 5.0 3.1 - - - -
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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