Contacts of the helix formed by residues 134 - 140 (chain B) in PDB entry 1EQB
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 134 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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258A PRO 3.0 23.1 + - - +
259A GLY 3.5 8.3 + - - -
260A GLY* 5.1 1.6 - - - -
261A GLN 5.2 3.6 + - - -
127B LEU* 3.5 23.8 + - + +
128B THR* 3.5 24.3 - - - +
131B SER* 3.0 14.0 + - - +
133B VAL* 1.3 82.8 - - + +
135B PHE* 1.3 77.0 + - - +
136B SER* 2.7 35.0 + - - -
137B GLY 3.1 9.4 + - - -
138B LYS* 3.2 17.9 + - - +
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Residues in contact with PHE 135 (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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103A PHE* 4.5 15.0 - + + -
107A THR* 5.9 1.8 - - + -
259A GLY 3.0 21.6 + - - +
260A GLY* 4.3 14.6 - - - -
99B SER* 4.1 7.4 - - - -
103B PHE* 3.5 53.6 - + + -
106B TYR* 3.8 30.5 - + + -
128B THR* 4.1 19.1 - - + -
134B ASN* 1.3 92.5 + - - +
136B SER* 1.3 72.4 + - - +
138B LYS* 4.4 7.9 - - - +
139B LEU* 2.9 51.4 + - + +
140B TYR* 4.9 2.7 - + - -
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Residues in contact with SER 136 (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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106B TYR* 3.6 14.6 - - - -
127B LEU 3.2 7.3 + - - -
128B THR 3.5 19.2 - - - -
130B GLY* 3.0 26.7 + - - -
131B SER 3.5 0.9 + - - -
134B ASN* 2.7 22.8 + - - -
135B PHE* 1.3 87.6 - - - +
137B GLY* 1.3 60.2 + - - +
140B TYR* 3.4 34.6 + - - +
142B ILE* 3.9 4.7 - - - +
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Residues in contact with GLY 137 (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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130B GLY 3.8 12.8 - - - -
131B SER 3.2 18.0 + - - -
132B PRO* 4.1 8.0 - - - +
134B ASN 3.1 4.0 + - - -
136B SER* 1.3 82.6 + - - +
138B LYS* 1.3 61.6 + - - +
140B TYR 3.5 11.2 - - - +
142B ILE* 4.3 6.0 - - - +
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Residues in contact with LYS 138 (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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107A THR* 5.7 9.2 - - - +
112A PRO* 5.5 2.8 - - - +
259A GLY* 5.0 5.1 - - - -
132B PRO 3.4 14.1 + - - +
133B VAL* 3.1 36.7 + - - +
134B ASN* 3.2 13.7 + - - +
135B PHE* 4.0 6.3 - - - +
137B GLY* 1.3 78.1 - - - +
139B LEU* 1.3 68.8 + - + +
140B TYR 3.5 1.0 - - - +
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Residues in contact with LEU 139 (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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103A PHE* 5.2 4.0 - - + -
107A THR* 5.9 7.0 - - + -
112A PRO* 3.9 28.3 - - + -
139A LEU* 4.5 30.3 - - + -
140A TYR* 6.1 0.9 - - - +
103B PHE* 4.6 11.7 - - + -
107B THR* 5.8 1.1 - - + -
112B PRO* 3.5 10.6 - - + +
113B GLY* 2.8 24.1 + - - -
135B PHE* 2.9 39.9 + - + +
138B LYS* 1.3 82.7 - - + +
140B TYR* 1.3 82.8 + - + +
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Residues in contact with TYR 140 (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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139A LEU* 6.1 0.7 - - - +
106B TYR* 3.5 54.5 + + + +
107B THR* 3.9 14.9 + - - +
110B LEU* 4.0 18.1 + - + -
111B GLU 3.5 28.5 - - - -
112B PRO* 3.8 13.2 - - + +
113B GLY* 3.8 4.9 - - - +
114B ASP 3.5 11.0 - - - +
116B VAL* 4.3 11.4 - - + -
135B PHE* 4.7 4.9 - + - -
136B SER* 3.4 23.9 + - - +
137B GLY 3.5 17.0 - - - +
138B LYS 4.7 0.7 - - - +
139B LEU* 1.3 104.8 - - + +
141B ASN* 1.3 62.2 + - - +
142B ILE* 3.5 6.8 + - + +
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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