Contacts of the helix formed by residues 61 - 66 (chain U) in PDB entry 2AXT
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 61 (chain U).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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59U ASN 3.3 0.8 + - - -
60U THR* 1.3 77.1 - - - +
62U ILE* 1.3 53.1 + - - +
63U ALA* 2.8 24.5 + - - +
64U ALA* 2.8 37.4 + - - +
65U PHE* 4.9 1.1 - - - -
126U ASP 3.2 22.8 + - - +
127U ARG* 3.0 25.8 + - - +
128U TYR 3.7 7.1 + - - +
130U ASN* 3.6 33.9 + - + +
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Residues in contact with ILE 62 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
324C LEU* 3.5 51.1 - - + +
60U THR 3.9 1.8 + - - -
61U ASN* 1.3 71.8 - - - +
63U ALA* 1.3 65.5 + - + +
64U ALA 2.9 6.6 + - - -
65U PHE* 3.1 29.5 + - - +
72U TYR* 3.9 9.4 - - + +
76U ALA* 3.7 17.9 - - + +
77U LYS* 4.0 18.4 - - - +
80U VAL* 4.0 13.2 - - + +
127U ARG* 2.8 23.4 + - - +
128U TYR* 4.1 23.6 - - + +
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Residues in contact with ALA 63 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
61U ASN* 2.8 20.2 + - - +
62U ILE* 1.3 77.9 - - + +
64U ALA* 1.3 59.8 + - - +
65U PHE 3.2 1.0 + - - -
66U ILE* 3.4 28.9 + - + +
72U TYR* 4.4 1.6 - - + -
130U ASN* 6.2 0.2 - - - +
77V SER* 4.1 20.9 - - - +
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Residues in contact with ALA 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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55U ILE* 3.4 15.1 - - + +
60U THR* 3.2 25.4 - - + -
61U ASN* 2.8 17.1 + - - +
63U ALA* 1.3 78.6 - - - +
65U PHE* 1.3 58.0 + - + +
66U ILE 3.2 0.8 + - - -
67U GLN* 2.5 45.7 + - - +
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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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55U ILE* 3.3 42.6 - - + -
57U LEU* 4.4 7.6 - - + -
60U THR 5.3 1.1 - - - -
61U ASN 5.0 2.0 - - - -
62U ILE* 3.1 28.0 - - - +
63U ALA 3.2 0.6 - - - -
64U ALA* 1.3 74.4 - - - +
66U ILE* 1.3 57.1 + - - +
67U GLN 3.0 11.4 + - - -
68U TYR 3.7 11.8 + - - +
71U LEU* 3.9 19.0 - - + +
72U TYR* 3.7 20.2 + - - +
76U ALA* 3.2 29.6 - - + -
79U ILE* 3.7 36.1 - - + -
80U VAL* 3.7 26.0 - - + -
112U PHE* 4.4 3.8 - + - -
127U ARG* 5.2 6.7 - - - -
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Residues in contact with ILE 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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63U ALA* 3.7 18.8 - - + +
64U ALA 3.2 2.4 - - - -
65U PHE* 1.3 75.6 - - - +
67U GLN* 1.3 58.0 + - - +
68U TYR 3.7 0.9 - - - -
72U TYR* 3.1 55.6 - - + -
77V SER* 3.7 33.2 - - - +
78V LEU* 3.4 27.1 - - + -
84V THR* 5.6 3.8 - - + +
87V LEU* 5.7 0.5 - - - +
108V TYR* 3.8 26.7 + - + -
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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