Contacts of the strand formed by residues 126 - 134 (chain A) in PDB entry 2IAF
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 126 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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118A SER* 3.8 20.9 - - - +
119A ALA 3.6 7.6 - - - +
120A PHE* 3.6 24.3 - - + -
124A ALA 3.8 1.2 + - - -
125A ASN* 1.3 73.1 - - - +
127A LEU* 1.3 63.7 + - - +
128A ILE* 3.4 28.9 - - - +
129A GLU* 4.0 30.1 - - + +
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Residues in contact with LEU 127 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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26A LEU* 3.9 35.8 - - + +
29A LYS* 3.8 35.7 - - + -
30A THR* 3.6 28.0 - - - +
119A ALA* 2.8 17.1 + - + +
120A PHE 3.9 2.5 - - - -
121A ASP* 3.7 36.6 - - + +
125A ASN* 3.2 2.9 + - + +
126A LEU* 1.3 76.2 - - - +
128A ILE* 1.3 61.7 + - - +
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Residues in contact with ILE 128 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17A PHE* 4.1 8.1 - - + -
20A LEU* 3.7 33.4 - - + +
21A LEU* 3.7 29.6 - - + -
24A LYS* 4.0 24.7 - - + -
26A LEU* 3.9 11.4 - - + -
118A SER* 3.3 2.4 - - - -
119A ALA* 3.0 32.0 + - + -
126A LEU* 3.4 9.3 - - - +
127A LEU* 1.3 80.3 - - + +
129A GLU* 1.3 72.4 + - - +
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Residues in contact with GLU 129 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17A PHE* 4.7 0.2 - - - -
116A ARG* 3.7 25.3 + - - +
117A PHE 3.1 10.1 - - - +
118A SER* 3.7 11.5 + - - +
126A LEU* 4.0 24.7 - - + +
128A ILE* 1.3 84.7 - - - +
130A GLN* 1.3 67.9 + - - +
131A VAL* 6.3 0.4 - - + -
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Residues in contact with GLN 130 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17A PHE* 4.1 6.5 - - + -
20A LEU* 3.8 25.5 - - + +
116A ARG* 3.5 1.6 - - - +
117A PHE* 2.7 34.8 + - - -
128A ILE* 5.9 0.2 - - - +
129A GLU* 1.3 80.5 - - - +
131A VAL* 1.3 87.7 + - - +
132A TYR* 3.4 39.5 - - + +
142A THR* 3.5 14.2 - - - +
143A GLU* 4.1 0.8 - - - +
144A GLU* 2.9 33.6 + - - +
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Residues in contact with VAL 131 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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108A LEU* 3.7 28.9 - - + -
115A MSE 3.2 3.8 - - - +
116A ARG* 3.8 36.6 - - + +
129A GLU* 6.3 0.7 - - + -
130A GLN* 1.3 98.9 + - - +
132A TYR* 1.3 65.4 + - - +
133A TYR* 3.7 26.2 - - + -
142A THR* 3.4 1.9 - - - -
143A GLU* 3.1 39.7 + - + +
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Residues in contact with TYR 132 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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13A ALA* 3.8 27.6 - - + -
16A ALA* 3.5 25.1 + - + +
17A PHE* 3.4 25.1 + - + -
20A LEU* 4.1 8.0 - - - +
114A GLY* 3.7 2.1 - - - -
115A MSE 2.9 38.0 + - + +
117A PHE* 3.6 29.8 - + - -
130A GLN* 3.4 26.4 - - + +
131A VAL* 1.3 80.5 - - - +
133A TYR* 1.3 66.8 + - - +
140A ILE* 4.1 16.8 - - + -
141A THR 3.2 13.9 - - - +
142A THR* 3.7 22.8 - - + +
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Residues in contact with TYR 133 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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108A LEU* 3.4 21.9 - - + +
109A PRO* 3.5 0.3 - - - +
110A LYS* 3.2 31.9 + - + +
111A HIS* 3.3 42.2 - - + -
113A ASN 3.2 13.9 - - - +
114A GLY* 3.7 5.6 - - - -
115A MSE 4.2 3.6 - - - -
131A VAL* 3.7 19.7 - - + -
132A TYR* 1.3 75.6 - - - +
134A SER* 1.3 60.5 - - - +
135A ILE* 3.9 17.1 + - + -
140A ILE* 3.2 6.2 - - - +
141A THR* 2.9 38.4 + - + +
143A GLU* 2.7 33.3 + - - -
146A PHE* 3.8 20.2 - + + -
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Residues in contact with SER 134 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5A SER* 3.0 37.7 + - - -
9A GLY* 3.4 10.0 - - - -
10A PRO* 4.2 6.7 - - - -
41A LEU* 4.6 2.5 - - - -
113A ASN* 2.8 47.7 + - - +
115A MSE 3.8 20.1 - - - +
133A TYR* 1.3 71.4 - - - +
135A ILE* 1.3 60.3 + - - +
136A GLY* 3.8 1.3 - - - -
139A PHE 3.5 4.5 - - - -
140A ILE* 4.3 2.0 - - - -
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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