Contacts of the helix formed by residues 356 - 361 (chain A) in PDB entry 3A61
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 ASN 356 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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354A HIS 3.9 3.2 + - - -
355A ILE* 1.3 72.2 - - - +
357A TRP* 1.3 53.3 + - - +
358A GLU* 3.4 14.1 + - - +
359A GLU* 2.4 77.6 + - + +
360A LEU* 3.1 10.8 + - - +
365A VAL* 5.8 0.8 - - + +
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Residues in contact with TRP 357 (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 ALA* 3.2 36.6 - - + -
203A SER* 4.0 7.2 - - - -
204A MET* 3.8 28.9 - - + +
347A GLN* 3.1 64.1 + - + +
348A ALA* 5.6 0.2 - - - +
352A PHE* 3.8 17.6 + + + -
355A ILE* 3.1 34.0 + - + -
356A ASN* 1.3 71.5 - - - +
358A GLU* 1.3 60.7 + - + +
360A LEU* 3.8 9.3 - - + +
361A LEU* 3.4 22.5 + - - +
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Residues in contact with GLU 358 (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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356A ASN* 2.8 12.8 + - - +
357A TRP* 1.3 76.6 - - + +
359A GLU* 1.3 68.3 + - - +
360A LEU 3.1 0.7 + - - -
361A LEU* 3.6 6.7 + - - +
362A ALA* 3.6 15.4 + - - +
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Residues in contact with GLU 359 (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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356A ASN* 2.4 56.6 + - + +
358A GLU* 1.3 68.0 - - - +
360A LEU* 1.3 61.6 + - - +
362A ALA* 3.1 19.5 + - - +
364A LYS* 3.5 34.5 + - + +
365A VAL* 3.3 23.7 - - + +
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Residues in contact with LEU 360 (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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154A PHE* 3.7 11.6 - - + -
197A PHE* 4.0 13.2 - - + +
200A ALA* 3.6 31.4 - - + -
201A GLU* 3.8 26.8 - - + +
204A MET* 4.4 6.3 - - - -
231A HIS* 5.2 0.2 - - - -
355A ILE* 4.1 17.5 - - + -
356A ASN 3.1 10.1 + - - +
357A TRP* 3.9 22.9 - - + +
358A GLU 3.1 0.4 - - - -
359A GLU* 1.3 73.9 - - - +
361A LEU* 1.3 54.8 + - - +
362A ALA 2.7 14.9 + - - -
363A ARG* 2.8 16.8 + - - -
365A VAL* 3.6 35.3 - - + +
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Residues in contact with LEU 361 (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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152A HIS* 4.0 20.4 - - + +
153A PRO* 3.4 42.8 - - + +
154A PHE* 4.4 11.2 - - + -
204A MET* 4.1 23.3 - - + -
357A TRP 3.4 15.1 + - - +
358A GLU* 3.6 4.5 + - - +
359A GLU 3.5 0.2 - - - -
360A LEU* 1.3 76.1 - - - +
362A ALA* 1.3 55.8 + - - +
363A ARG 3.5 1.3 - - - -
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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