Contacts of the helix formed by residues 127 - 132 (chain D) in PDB entry 2AXZ
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 VAL 127 (chain D).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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92D PHE* 4.1 13.7 - - + -
96D PHE* 4.4 14.8 - - + -
117D ILE* 4.8 7.9 - - + -
120D ALA* 3.3 25.8 - - + -
121D HIS* 4.1 28.9 - - + +
125D ILE 4.2 2.7 - - - +
126D GLU* 1.3 80.6 + - - +
128D PRO* 1.3 69.4 - - - +
129D THR* 3.2 10.1 - - + -
130D PHE* 3.1 27.8 + - + +
131D ASN* 4.2 5.0 - - - +
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Residues in contact with PRO 128 (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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126D GLU* 3.6 13.5 - - + +
127D VAL* 1.3 88.2 - - - +
129D THR* 1.3 67.1 + - + +
130D PHE 3.1 0.7 + - - -
131D ASN* 3.6 10.9 + - + +
132D LYS* 3.3 28.4 - - + +
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Residues in contact with THR 129 (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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96D PHE* 4.3 27.8 - - + -
100D GLU* 3.7 23.2 + - + -
103D ARG* 5.0 0.7 + - - -
113D TYR* 4.6 3.8 + - - +
127D VAL* 4.1 9.6 - - + +
128D PRO* 1.3 83.0 - - + +
130D PHE* 1.3 71.0 + - - +
132D LYS* 3.1 15.1 + - - +
133D THR* 2.6 33.1 + - - -
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Residues in contact with PHE 130 (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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113D TYR* 3.8 14.8 - + - +
114D LEU* 4.8 1.3 - - + -
117D ILE* 3.3 45.5 - - + -
121D HIS* 4.0 16.2 - + - -
127D VAL* 3.1 23.2 + - + +
129D THR* 1.3 79.6 - - + +
131D ASN* 1.3 74.5 + - - +
132D LYS 2.7 0.9 + - - -
133D THR 2.6 26.3 + - - -
134D ILE* 2.9 50.4 + - + +
162D VAL* 3.5 35.2 - - + -
163D LEU* 4.4 9.0 - - + -
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Residues in contact with ASN 131 (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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121D HIS* 5.2 1.9 + - - -
127D VAL* 4.2 7.6 - - - +
128D PRO* 3.6 8.0 + - + +
130D PHE* 1.3 98.4 - - - +
132D LYS* 1.3 59.1 + - + +
134D ILE* 3.1 23.0 - - - +
135D THR* 5.1 1.4 + - - -
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Residues in contact with LYS 132 (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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128D PRO* 3.3 28.5 - - + +
129D THR* 3.5 9.6 - - - +
130D PHE 2.7 3.6 + - - -
131D ASN* 1.3 77.9 - - + +
133D THR* 1.3 61.7 + - - +
135D THR* 6.5 0.2 - - - -
136D SER* 4.9 2.3 + - - -
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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