Contacts of the helix formed by residues 350 - 356 (chain A) in PDB entry 2HRC
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 ILE 350 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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125A ARG* 3.5 54.7 - - + +
126A ILE* 4.0 6.5 - - + -
345A LEU 3.5 17.7 - - - +
346A TYR* 2.9 27.7 + - + +
349A ASP* 1.3 77.2 - - + +
351A GLU* 1.3 69.3 + - - +
352A TYR 3.3 0.9 - - - -
353A SER* 3.1 2.9 + - - -
354A GLN* 3.0 49.2 + - + +
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Residues in contact with GLU 351 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
122A GLN* 4.9 4.5 + - - -
316A ASP* 5.2 2.1 - - - +
346A TYR* 2.8 43.6 + - + +
347A GLU* 3.4 20.2 - - - +
350A ILE* 1.3 76.2 - - - +
352A TYR* 1.3 76.8 + - + +
354A GLN* 3.3 6.0 + - - +
355A VAL* 2.9 46.2 + - + +
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Residues in contact with TYR 352 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
302A GLN* 3.4 15.1 - - - +
303A SER 4.1 0.3 + - - -
315A THR* 3.7 14.8 - - + -
316A ASP* 3.7 36.7 + - + +
319A ILE* 3.8 24.0 - - + -
332A LEU* 5.1 0.4 - - + -
347A GLU* 2.7 38.8 + - + -
348A LEU* 3.4 43.5 - - + +
350A ILE 3.3 0.4 - - - -
351A GLU* 1.3 99.3 - - + +
353A SER* 1.3 61.4 + - - +
355A VAL* 4.3 6.3 - - + -
356A LEU* 3.0 37.0 + - + +
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Residues in contact with SER 353 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
348A LEU 4.0 3.3 + - - -
349A ASP* 2.6 29.1 + - - -
350A ILE* 3.1 5.4 + - - -
352A TYR* 1.3 78.5 - - - +
354A GLN* 1.3 62.5 + - - +
356A LEU* 5.0 2.7 - - - -
357A ALA* 3.5 24.9 + - - +
365A ILE* 5.7 6.0 - - - +
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Residues in contact with GLN 354 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
125A ARG* 2.8 38.8 + - - +
346A TYR* 5.9 0.4 + - - -
350A ILE* 3.0 24.5 + - + +
351A GLU* 3.8 5.0 + - - +
353A SER* 1.3 79.6 - - - +
355A VAL* 1.3 64.8 + - + +
356A LEU 3.2 6.0 + - - +
357A ALA* 4.4 5.0 - - - +
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Residues in contact with VAL 355 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
316A ASP* 5.5 10.5 - - + +
351A GLU* 2.9 43.1 + - + +
352A TYR* 3.4 8.3 + - + +
354A GLN* 1.3 77.6 - - + +
356A LEU* 1.3 71.4 + - + +
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Residues in contact with LEU 356 (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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316A ASP* 4.3 11.0 - - + +
319A ILE* 3.3 39.0 - - + -
320A LYS* 4.0 33.4 - - + -
352A TYR* 3.0 24.2 + - + +
353A SER* 4.4 1.8 - - - +
354A GLN 3.2 2.3 - - - +
355A VAL* 1.3 92.6 - - + +
357A ALA* 1.3 61.8 + - - +
358A LYS* 2.6 28.5 + - - +
360A CYS 5.2 3.8 - - - +
362A VAL* 4.8 13.9 - - + -
365A ILE* 4.9 4.5 - - + -
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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
------------------------------------------------------------
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