Contacts of the helix formed by residues 222 - 227 (chain E) in PDB entry 1QDU
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 ASP 222 (chain E).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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221E MET* 1.3 75.0 - - - +
224E HIS* 1.3 58.4 + - - +
225E SER* 2.6 46.8 + - - -
226E ASN* 4.6 2.1 + - - +
227E MET* 5.0 1.6 - - - +
272E SER* 3.5 6.1 - - - -
220K LEU 3.2 20.7 + - - +
221K MET 3.7 4.7 - - - +
222K ASP* 3.5 23.7 - - + +
271K PRO* 5.2 7.1 - - - +
272K SER* 3.4 17.3 + - - -
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Residues in contact with HIS 224 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
164E TYR* 4.1 20.4 + + - -
218E TYR* 2.7 33.1 + - + -
221E MET* 3.7 17.1 - - + +
222E ASP* 1.3 70.7 - - - +
225E SER* 1.3 54.7 + - - +
226E ASN 3.1 2.9 - - - -
227E MET* 2.6 51.9 + - + +
229E CYS 5.4 0.2 + - - -
230E PHE* 4.1 26.3 - + - +
265E PHE* 5.6 0.2 - + - -
270E CYS* 3.8 11.4 - - - -
272E SER* 2.9 33.0 + - - +
273E LEU* 3.6 22.1 - - + +
276E LYS* 3.1 8.8 + - - -
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Residues in contact with SER 225 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
222E ASP* 2.6 30.5 + - - -
224E HIS* 1.3 77.4 - - - +
226E ASN* 1.3 68.6 + - - +
227E MET 3.5 1.7 + - - +
272E SER* 3.6 9.7 + - - -
276E LYS* 3.9 16.0 + - - +
222K ASP* 4.9 0.9 + - - -
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Residues in contact with ASN 226 (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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157E SER* 3.3 20.6 + - - -
160E LYS* 5.6 4.2 - - + +
161E PRO* 4.8 3.9 - - + +
222E ASP 4.6 2.2 + - - +
224E HIS 3.1 0.8 - - - -
225E SER* 1.3 86.0 - - - +
227E MET* 1.3 65.5 + - + +
228E ASP* 5.2 0.2 - - - +
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Residues in contact with MET 227 (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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157E SER* 4.2 0.4 - - - -
161E PRO* 3.5 31.4 - - + -
162E ARG 3.8 3.8 - - - +
163E GLY* 3.5 26.2 - - - -
164E TYR* 3.5 45.1 - - + +
199E GLU* 5.1 0.4 - - - +
222E ASP 5.0 1.1 - - - +
224E HIS* 2.6 46.7 + - + +
225E SER 4.0 0.7 - - - +
226E ASN* 1.3 81.4 - - + +
228E ASP* 1.3 62.5 + - - +
229E CYS 4.4 4.3 - - - +
273E LEU* 5.4 0.9 - - + -
276E LYS* 2.8 28.7 - - + -
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Residues in contact with ASP 228 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
154E GLN* 3.4 38.8 - - - +
155E MET* 4.4 8.5 - - - -
156E LYS* 2.9 11.4 + - - +
157E SER* 2.7 37.3 + - - -
162E ARG* 2.6 16.5 + - - +
227E MET* 1.3 77.0 - - - +
229E CYS* 1.3 60.3 + - - +
276E LYS* 3.6 15.6 - - - +
277E PRO* 3.3 19.1 - - - +
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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