Contacts of the helix formed by residues 137 - 143 (chain A) in PDB entry 1LVK
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 GLN 137 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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136A THR* 1.3 74.9 - - - +
138A GLU* 1.3 75.2 + - - +
140A VAL* 3.1 12.2 + - - +
141A ASP* 2.8 52.7 + - - +
194A GLN* 4.9 4.8 + - - +
198A SER* 3.1 29.9 + - - -
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Residues in contact with GLU 138 (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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136A THR* 3.0 19.2 - - - +
137A GLN* 1.3 92.1 + - - +
139A MET* 1.3 59.5 + - + +
141A ASP* 3.4 15.9 + - - +
142A ILE* 2.8 24.3 + - + +
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Residues in contact with MET 139 (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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10A ASP* 3.7 44.9 - - + +
11A TYR* 3.8 5.2 - - + +
14A TYR* 4.8 0.2 - - + -
15A LEU* 3.6 25.4 - - + -
133A PRO 3.7 15.5 - - - +
134A ILE* 3.2 37.5 - - + +
136A THR* 2.9 25.5 + - - +
138A GLU* 1.3 75.9 - - + +
140A VAL* 1.4 67.4 + - - +
142A ILE* 3.0 26.6 + - + +
143A PHE* 3.1 22.4 - - + -
156A PHE* 4.0 6.1 - - + -
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Residues in contact with VAL 140 (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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136A THR 2.8 10.2 + - - +
137A GLN* 3.3 20.0 - - - +
139A MET* 1.4 79.2 - - - +
141A ASP* 1.3 64.0 + - - +
143A PHE 3.2 9.4 + - - -
144A LYS* 3.5 5.9 - - + +
156A PHE* 3.4 33.0 - - + -
194A GLN* 3.5 24.7 - - + +
195A TYR* 3.4 30.3 - - + -
198A SER* 3.3 29.6 - - - +
199A VAL* 4.7 5.2 - - + -
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Residues in contact with ASP 141 (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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137A GLN* 2.8 45.3 + - - +
138A GLU* 3.6 11.4 - - - +
139A MET 3.2 0.2 - - - -
140A VAL* 1.3 78.4 - - - +
142A ILE* 1.3 60.5 + - + +
144A LYS* 3.4 33.3 + - + +
198A SER* 4.8 0.2 + - - -
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Residues in contact with ILE 142 (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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3A PRO* 4.3 22.7 - - + -
4A ILE* 2.9 34.3 - - + +
11A TYR* 4.1 28.0 - - + -
138A GLU* 2.8 25.8 - - + +
139A MET* 3.0 35.0 - - + +
140A VAL 3.3 0.6 - - - -
141A ASP* 1.3 74.7 - - + +
143A PHE* 1.3 67.2 + - + +
144A LYS 3.2 1.2 + - - +
146A ARG* 3.2 21.1 + - - +
151A VAL* 4.4 3.3 - - + +
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Residues in contact with PHE 143 (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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11A TYR* 4.2 17.9 - + - -
15A LEU* 4.3 8.7 - - + -
139A MET* 3.1 28.0 - - + -
140A VAL 3.2 3.4 + - - -
142A ILE* 1.3 83.6 - - + +
144A LYS* 1.3 62.6 + - - +
145A GLY 3.2 3.1 + - - -
146A ARG* 3.2 14.8 + - - +
151A VAL* 3.6 19.5 - - + -
152A ALA 3.5 24.0 - - - -
154A HIS* 3.5 39.0 - + + -
156A PHE* 3.6 25.6 - + + +
157A ALA* 3.5 20.4 - - + -
160A ASP* 3.2 7.8 - - - +
195A TYR* 3.1 20.2 + - + +
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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