Contacts of the strand formed by residues 127 - 131 (chain B) in PDB entry 3AIH
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 HIS 127 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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121B GLU* 4.5 1.5 + - - -
123B CYS* 2.9 50.0 + - - +
126B ARG* 1.3 111.5 + - - +
128B ILE* 1.3 68.2 + - - +
129B GLN* 3.5 38.4 + - + -
144B TYR* 3.9 16.4 - + + -
146B GLY 3.3 14.1 - - - +
147B TYR* 4.0 15.4 - - + -
175B TYR* 3.9 5.0 - - - -
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Residues in contact with ILE 128 (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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120B TYR* 5.1 2.0 - - + -
121B GLU 3.3 14.1 - - - +
122B PHE* 3.4 21.8 - - + -
127B HIS* 1.3 74.7 - - - +
129B GLN* 1.3 67.1 + - - +
144B TYR* 3.5 6.9 - - - -
145B LEU* 2.9 53.6 + - + -
146B GLY 3.1 7.2 + - - +
175B TYR* 3.8 26.0 - - + -
190B ALA* 3.8 18.8 - - + -
192B VAL* 3.8 22.7 - - + -
220B LEU* 4.1 21.1 - - + -
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Residues in contact with GLN 129 (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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119B THR 4.4 0.2 - - - -
120B TYR* 3.3 6.2 - - - +
121B GLU* 2.9 58.0 + - - +
127B HIS* 3.5 22.1 + - + -
128B ILE* 1.3 78.4 - - - +
130B GLN* 1.3 63.3 + - - +
131B TYR* 4.1 13.5 - - + -
142B VAL* 3.8 21.5 - - + +
143B LEU 3.2 4.9 - - - +
144B TYR* 2.9 44.6 + - + -
145B LEU* 4.8 0.2 - - - -
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Residues in contact with GLN 130 (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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118B TRP* 3.6 26.5 - - + -
119B THR 3.3 4.0 - - - +
120B TYR* 3.3 31.2 + - + -
129B GLN* 1.3 75.4 - - - +
131B TYR* 1.3 61.8 + - - +
141B GLU 4.4 0.2 - - - +
143B LEU* 2.8 51.0 + - - +
145B LEU* 3.4 28.2 - - + +
188B ARG* 4.2 0.4 - - - +
218B TYR* 4.0 1.6 + - - -
3D MAN 2.6 50.3 + - - -
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Residues in contact with TYR 131 (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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112B LEU* 3.2 18.2 - - - +
118B TRP* 3.6 10.9 - - - -
119B THR* 2.8 58.6 + - + +
121B GLU* 2.8 40.6 + - + -
129B GLN* 4.1 18.2 - - + -
130B GLN* 1.3 79.8 - - - +
132B HIS* 1.3 58.2 + - - +
133B MET* 3.9 24.6 - - + +
138B ILE* 3.9 34.5 - - + -
141B GLU 4.3 3.6 - - - +
142B VAL* 4.0 28.5 - - + -
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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