Contacts of the helix formed by residues 364 - 373 (chain A) in PDB entry 2ENT
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 ARG 364 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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351A PHE* 3.2 18.0 - - - -
362A PHE* 3.5 15.4 - - - +
363A SER* 1.3 102.3 + - - +
365A SER* 1.3 66.2 + - - +
366A ASP* 4.5 5.8 - - + +
367A GLU* 3.7 26.7 - - + +
368A LEU 3.5 1.7 + - - -
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Residues in contact with SER 365 (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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351A PHE* 3.3 35.5 - - - -
364A ARG* 1.3 69.6 - - - +
366A ASP* 1.3 77.0 + - - +
367A GLU 3.1 1.6 - - - -
368A LEU* 2.7 26.6 + - - +
369A SER* 2.8 14.5 + - - -
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Residues in contact with ASP 366 (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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364A ARG* 3.6 5.9 - - + +
365A SER* 1.3 92.0 + - - +
367A GLU* 1.3 57.7 + - + +
369A SER* 3.8 8.2 - - - -
370A ARG* 2.9 36.2 + - - +
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Residues in contact with GLU 367 (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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362A PHE* 3.1 51.2 - - + -
363A SER 5.6 0.2 - - - +
364A ARG* 3.7 32.0 + - + +
365A SER 3.1 0.2 - - - -
366A ASP* 1.3 79.4 - - + +
368A LEU* 1.3 58.0 + - - +
370A ARG* 3.0 44.6 + - - +
371A HIS 3.6 0.5 + - - -
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Residues in contact with LEU 368 (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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351A PHE* 3.6 39.5 - - + +
352A ALA 3.7 5.2 - - - +
353A CYS* 3.5 37.0 - - + +
362A PHE* 3.2 29.6 - - + -
364A ARG 3.5 1.2 + - - +
365A SER* 2.7 14.5 + - - +
367A GLU* 1.3 74.0 - - - +
369A SER* 1.3 65.0 + - - +
371A HIS* 3.1 5.1 + - + +
372A ARG* 3.0 48.8 + - + +
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Residues in contact with SER 369 (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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365A SER 2.8 11.0 + - - -
366A ASP* 3.8 11.2 - - - -
368A LEU* 1.3 78.2 - - - +
370A ARG* 1.3 63.0 + - - +
371A HIS 3.2 0.7 + - - -
372A ARG* 3.2 25.3 + - - +
373A ARG* 3.7 9.1 + - - +
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Residues in contact with ARG 370 (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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362A PHE* 5.5 0.4 - - + -
366A ASP* 2.9 12.6 + - - +
367A GLU* 3.0 55.0 + - - +
369A SER* 1.3 77.2 - - - +
371A HIS* 1.3 57.9 + - + +
373A ARG* 3.2 36.7 - - - +
374A SER* 4.5 0.7 + - - -
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Residues in contact with HIS 371 (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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200A ZN 2.0 36.8 - - - -
353A CYS* 3.6 11.6 - - + -
358A CYS* 3.6 2.2 - - - -
360A TRP* 3.6 27.2 - + + +
362A PHE* 3.0 42.3 - + + -
367A GLU 3.7 2.0 - - - +
368A LEU* 3.1 7.8 + - + +
369A SER 3.1 0.6 - - - -
370A ARG* 1.3 80.1 - - + +
372A ARG* 1.3 57.6 + - - +
373A ARG 2.6 17.2 + - - -
374A SER* 2.7 33.9 + - - -
375A HIS* 3.2 9.3 + + - -
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Residues in contact with ARG 372 (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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353A CYS* 4.3 10.5 - - - -
354A THR* 3.1 51.1 + - - +
355A TRP* 5.2 0.4 - - - +
368A LEU* 3.0 48.3 + - + +
369A SER* 3.4 11.8 - - - +
371A HIS* 1.3 77.7 - - - +
373A ARG* 1.3 63.0 + - - +
375A HIS* 2.9 28.9 + - - +
377A GLY 5.5 0.2 + - - -
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Residues in contact with ARG 373 (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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369A SER* 3.8 8.2 + - - +
370A ARG* 3.2 28.8 - - - +
371A HIS 2.6 4.4 + - - -
372A ARG* 1.3 74.3 - - - +
374A SER* 1.3 56.4 + - - +
375A HIS 2.6 20.4 - - - +
385A SER* 5.1 8.9 + - - -
386A GLY 5.4 9.1 - - - -
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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