Contacts of the helix formed by residues 117 - 121 (chain A) in PDB entry 1EBF
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 LYS 117 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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94A SER* 5.6 0.6 - - - +
115A PRO 3.3 4.1 + - - +
116A ASN* 1.3 73.0 + - - +
118A LYS* 1.3 61.0 - - + +
119A ALA 3.6 0.2 - - - -
120A PHE* 3.1 7.4 + - - +
121A SER* 2.6 35.4 + - - +
145A THR* 3.4 42.4 + - - +
219A ASP* 3.0 30.6 + - - +
222A ARG* 4.1 23.3 - - + +
223A LYS* 3.6 21.4 - - + +
226A ILE* 4.2 5.8 - - + +
2109A NAD 3.8 25.7 + - - -
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Residues in contact with LYS 118 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
94A SER* 2.8 33.0 + - - +
95A SER 3.8 10.3 - - - +
96A ALA* 4.1 16.5 - - + +
99A ALA* 3.3 18.6 - - + -
116A ASN* 2.9 19.4 + - - +
117A LYS* 1.3 76.0 - - + +
119A ALA* 1.3 59.0 + - - +
121A SER* 2.9 22.4 + - - -
122A SER* 3.3 16.1 + - - -
222A ARG* 3.8 35.0 + - - +
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Residues in contact with ALA 119 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
99A ALA* 3.5 20.5 - - + +
102A TYR* 3.3 40.4 - - + -
116A ASN 4.6 1.0 + - - -
117A LYS 3.6 0.6 - - - -
118A LYS* 1.3 78.1 - - - +
120A PHE* 1.3 60.0 + - + +
121A SER 3.8 0.2 + - - -
122A SER* 3.8 11.2 + - - -
123A ASP 5.0 0.7 - - - +
126A THR* 3.8 18.1 - - + +
127A TRP* 4.6 4.0 + - - -
130A LEU* 3.7 17.6 - - + +
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Residues in contact with PHE 120 (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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102A TYR* 3.7 17.5 - + - -
114A THR* 3.6 13.7 - - + -
116A ASN 3.3 26.2 - - - -
117A LYS 3.1 1.5 + - - +
118A LYS 3.1 1.0 - - - -
119A ALA* 1.3 78.0 - - - +
121A SER* 1.3 59.6 + - - +
122A SER 3.7 1.1 - - - -
127A TRP* 3.3 19.5 - - + -
130A LEU* 3.9 10.8 - - + -
131A PHE* 3.7 23.1 - + - -
140A VAL* 3.4 33.4 - - + -
142A HIS* 3.4 39.7 - + + -
145A THR* 4.0 7.4 - - + -
225A THR* 4.3 1.9 - - - +
226A ILE* 3.5 27.0 - - + +
229A ARG* 3.2 16.6 + - - -
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Residues in contact with SER 121 (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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117A LYS 2.6 22.3 + - - -
118A LYS 2.9 4.6 + - - -
120A PHE* 1.3 79.9 - - - +
122A SER* 1.3 60.3 + - - +
222A ARG* 3.1 56.6 + - - +
225A THR* 4.1 5.6 - - - -
226A ILE* 4.4 0.4 - - - -
229A ARG* 4.0 3.6 - - - +
238A PRO* 3.0 32.2 - - - +
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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