Contacts of the helix formed by residues 301 - 305 (chain A) in PDB entry 4ACR
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 THR 301 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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223A PHE* 3.7 17.3 - - + -
297A MET 3.4 19.1 - - - +
298A VAL* 2.6 20.0 + - - +
300A ILE* 1.3 75.0 - - - +
302A ASP* 1.3 64.6 + - - +
303A LYS 3.1 2.5 - - - -
304A PHE* 3.1 38.9 + - + +
305A TRP* 3.0 20.7 + - - -
379A VAL* 4.2 17.9 - - + +
382A ALA* 6.4 0.4 - - + -
383A LYS* 3.8 20.2 - - + -
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Residues in contact with ASP 302 (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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298A VAL* 3.8 12.0 - - - +
299A LEU* 3.1 29.5 + - - +
301A THR* 1.3 81.8 + - - +
303A LYS* 1.3 60.3 + - + +
304A PHE 3.1 1.4 + - - -
305A TRP* 3.9 22.2 + - - +
383A LYS* 4.7 9.9 + - - -
471A TYR* 4.3 12.8 + - + +
377B LYS* 5.9 0.5 + - - -
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Residues in contact with LYS 303 (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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215A ARG* 5.4 7.9 - - + +
219A ALA* 4.7 7.2 - - + -
300A ILE* 3.6 18.7 + - + +
301A THR 3.1 0.6 - - - -
302A ASP* 1.3 79.2 - - + +
304A PHE* 1.3 60.8 + - - +
305A TRP 3.2 3.1 - - - +
308A SER 4.3 2.1 - - - +
309A GLY* 3.3 7.3 - - - -
310A VAL* 2.9 31.9 + - + +
470A ALA 5.6 1.8 - - - +
471A TYR* 3.6 57.4 + - + +
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Residues in contact with PHE 304 (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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107A PHE* 4.7 5.2 - + - -
111A PHE* 4.3 19.7 - + - -
219A ALA* 4.4 9.2 - - + -
220A ALA* 4.6 4.5 - - - -
223A PHE* 4.5 17.3 - + + -
300A ILE 3.3 22.4 - - - -
301A THR* 3.2 36.1 - - + +
302A ASP 3.1 1.8 - - - -
303A LYS* 1.3 78.2 - - - +
305A TRP* 1.3 72.5 + - + +
306A GLY 5.2 0.2 - - - +
309A GLY* 3.6 1.2 - - - -
310A VAL* 3.2 44.8 + - + +
311A GLU* 3.3 21.5 - - - +
375A LEU* 4.1 15.3 - - + -
379A VAL* 3.7 23.3 - - + -
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Residues in contact with TRP 305 (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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301A THR 3.0 20.7 + - - -
302A ASP* 3.9 18.6 + - - +
303A LYS 3.2 2.2 - - - +
304A PHE* 1.3 89.7 - - + +
306A GLY* 1.3 62.2 + - - +
308A SER* 4.4 0.7 - - - -
309A GLY* 3.2 14.4 + - - -
311A GLU* 3.2 35.2 - - - -
375A LEU* 3.9 14.4 - - + -
376A GLU* 3.5 47.8 - - + -
379A VAL* 3.7 33.8 - - + +
383A LYS* 5.7 3.6 - - - +
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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