Contacts of the helix formed by residues 165 - 171 (chain E) in PDB entry 3IZ0
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 SER 165 (chain E).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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196A GLU* 4.1 13.0 - - - -
264A ARG* 4.4 8.6 + - - -
152E PRO* 4.8 0.4 - - - -
163E ALA* 4.0 2.8 + - - +
164E LEU* 1.3 75.3 - - - +
166E LYS* 1.3 64.2 + - - +
167E SER* 3.7 8.4 + - - -
168E SER* 2.8 50.1 + - - -
169E MET* 3.5 7.7 + - - +
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Residues in contact with LYS 166 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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196A GLU* 4.9 23.0 + - + +
197A HIS* 6.3 0.7 - - - +
148E GLU* 3.9 36.3 + - + +
149E GLU* 3.1 37.3 + - + +
152E PRO* 5.0 1.0 - - - +
164E LEU 3.8 1.0 + - - -
165E SER* 1.3 71.6 - - - +
167E SER* 1.3 62.9 + - - +
169E MET* 3.1 20.4 + - - +
170E TYR* 3.7 22.7 - - + -
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Residues in contact with SER 167 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
196A GLU* 4.1 18.4 + - - -
263A PRO* 4.4 21.5 - - - +
264A ARG* 3.6 30.2 + - - -
165E SER* 3.2 2.9 + - - -
166E LYS* 1.3 76.4 - - - +
168E SER* 1.3 68.5 + - - +
169E MET 3.2 0.3 + - - -
170E TYR* 3.2 21.4 + - - +
171E THR* 3.3 16.0 + - - +
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Residues in contact with SER 168 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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164E LEU* 4.7 1.8 - - - +
165E SER* 2.8 40.2 + - - -
167E SER* 1.3 75.7 + - - +
169E MET* 1.3 71.9 + - - +
171E THR* 3.0 6.8 + - - -
172E VAL* 2.9 31.2 + - - -
177E THR* 4.1 14.4 - - - +
180E HIS* 6.0 0.9 - - - +
181E ILE* 4.1 13.6 - - - +
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Residues in contact with MET 169 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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122E VAL* 3.6 9.5 - - - +
125E PHE* 4.4 10.8 - - + -
147E PHE* 3.2 22.7 - - + +
148E GLU* 3.7 23.8 - - + +
151E VAL* 3.6 36.8 - - + -
152E PRO* 3.6 23.1 - - + -
164E LEU* 4.4 15.3 - - + -
165E SER 3.7 7.0 - - - +
166E LYS 3.3 9.6 - - - +
167E SER 3.1 0.8 - - - -
168E SER* 1.3 81.5 - - - +
170E TYR* 1.3 57.8 + - - +
171E THR 3.6 0.3 + - - -
172E VAL* 3.7 14.5 - - + +
181E ILE* 3.7 29.6 - - + -
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Residues in contact with TYR 170 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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263A PRO* 5.4 6.7 - - + -
122E VAL* 3.6 16.3 - - - +
147E PHE* 4.4 12.1 - + - -
148E GLU* 3.2 44.2 + - + +
166E LYS* 3.7 34.8 - - + -
167E SER* 3.2 15.8 + - - +
168E SER 3.2 0.6 - - - -
169E MET* 1.3 77.4 - - - +
171E THR* 1.3 68.7 + - + +
172E VAL 3.7 0.7 - - - -
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Residues in contact with THR 171 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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262A TYR* 5.4 3.8 - - + -
263A PRO* 3.4 38.7 - - + +
122E VAL* 4.9 1.8 - - - -
167E SER* 3.3 12.4 + - - +
168E SER* 3.0 5.9 + - - -
170E TYR* 1.3 91.4 - - + +
172E VAL* 1.3 64.9 + - - +
173E GLY 3.1 3.1 - - - -
174E ALA* 2.8 32.1 + - - +
177E THR* 3.6 15.7 + - - +
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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