Contacts of the helix formed by residues 295 - 299 (chain A) in PDB entry 2QC8
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 295 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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38A GLU* 4.9 0.9 - - - +
239A ASP* 5.1 0.9 - - - -
240A PRO* 3.6 24.6 - - + +
289A ASP* 3.5 14.6 + - + -
290A PRO* 4.1 3.3 - - - +
291A LYS* 3.5 37.4 + - - +
293A GLY 3.3 0.2 - - - -
294A LEU* 1.3 78.5 - - - +
296A ASN* 1.3 61.0 + - - +
298A ARG* 3.1 45.0 + - - +
299A ARG 4.0 0.2 + - - -
345A ASN* 2.9 26.4 + - - +
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Residues in contact with ASN 296 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
240A PRO* 4.4 1.7 - - - +
285A ILE* 5.0 4.7 + - + +
288A TYR* 3.9 11.7 + - - +
289A ASP* 3.0 21.3 + - - +
293A GLY* 3.4 4.9 + - - +
294A LEU 3.4 0.2 - - - -
295A ASP* 1.3 72.5 - - - +
297A ALA* 1.3 58.7 + - - +
298A ARG 3.1 0.2 - - - -
299A ARG* 2.9 35.6 + - - +
300A LEU* 2.7 48.7 + - + +
309A ILE* 3.8 11.4 - - + -
341A ARG 3.0 22.5 + - - -
343A SER* 3.5 21.6 - - - +
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Residues in contact with ALA 297 (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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293A GLY 3.2 12.0 + - - +
294A LEU* 3.6 19.1 - - + +
295A ASP 3.2 0.8 - - - -
296A ASN* 1.3 76.7 - - - +
298A ARG* 1.3 61.2 + - + +
299A ARG 3.5 0.2 + - - -
300A LEU 4.4 4.0 + - - +
301A THR* 4.4 11.3 - - - +
309A ILE* 3.7 20.4 - - + +
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Residues in contact with ARG 298 (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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239A ASP* 2.9 43.0 + - - -
240A PRO* 4.0 2.7 - - - +
241A LYS* 3.3 44.4 + - + +
294A LEU 4.5 6.3 + - - +
295A ASP* 3.1 44.3 + - - +
296A ASN 3.1 0.6 - - - -
297A ALA* 1.3 79.6 - - + +
299A ARG* 1.3 56.0 + - - +
301A THR* 4.0 9.6 - - - +
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Residues in contact with ARG 299 (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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240A PRO* 3.6 23.0 - - + +
241A LYS* 4.5 8.0 + - - -
249A GLY* 4.5 4.7 - - - -
250A ALA 3.3 25.2 + - - +
251A GLY* 3.3 13.4 - - - -
253A HIS* 4.4 0.2 + - - -
295A ASP 4.0 0.6 + - - -
296A ASN* 2.9 25.4 + - - +
298A ARG* 1.3 78.8 - - - +
300A LEU* 1.3 64.2 + - - +
301A THR* 2.8 22.8 + - - +
303A PHE 4.6 0.3 - - - +
306A THR* 3.4 21.5 + - + +
340A ARG 3.5 11.9 + - - -
341A ARG 2.5 34.4 + - - -
342A PRO 2.9 13.1 + - - -
343A SER* 4.3 0.2 - - - +
601A P3S 3.0 37.3 + - - +
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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