Contacts of the helix formed by residues 402 - 408 (chain A) in PDB entry 4YKN
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 VAL 402 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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331A ALA* 4.9 11.7 - - + -
333A TRP* 4.2 27.1 - - + -
401A VAL* 1.3 79.8 - - + +
403A GLU* 1.3 64.5 + - - +
405A ILE* 3.4 1.4 + - - +
406A ASN* 2.8 44.2 + - - +
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Residues in contact with GLU 403 (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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397A THR 6.0 1.8 - - - +
401A VAL* 3.2 17.2 - - + +
402A VAL* 1.3 82.3 - - - +
404A LEU* 1.3 61.7 + - - +
406A ASN* 3.4 6.1 + - - +
407A HIS* 3.3 18.5 + - - +
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Residues in contact with LEU 404 (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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370A LEU* 5.8 0.4 - - + -
383A ILE* 4.3 22.0 - - + -
390A TYR 4.1 24.7 - - - +
391A GLY* 4.3 5.6 - - - -
392A PHE* 3.5 39.7 - - + -
397A THR 6.0 2.9 - - - +
401A VAL* 3.6 28.3 - - + +
402A VAL 3.4 0.2 - - - -
403A GLU* 1.3 77.4 - - + +
405A ILE* 1.3 71.4 + - + +
406A ASN 3.3 0.2 - - - -
407A HIS* 3.5 9.6 + - + +
408A TYR* 3.3 36.4 + - + -
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Residues in contact with ILE 405 (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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333A TRP* 3.6 45.1 - - + +
355A PHE* 3.9 24.0 - - + -
357A VAL* 5.2 4.3 - - + -
370A LEU* 5.9 2.9 - - + -
401A VAL 3.8 5.8 + - - +
402A VAL 3.4 4.4 + - - +
403A GLU 3.3 1.0 - - - -
404A LEU* 1.3 86.8 - - + +
406A ASN* 1.3 62.0 + - - +
408A TYR* 3.5 5.0 + - - +
409A ARG* 3.2 23.3 + - + +
424A LEU* 4.7 2.2 - - + +
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Residues in contact with ASN 406 (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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333A TRP* 5.0 8.9 - - - +
402A VAL* 2.8 35.7 + - - +
403A GLU* 3.9 6.0 - - - +
404A LEU 3.3 0.4 - - - -
405A ILE* 1.3 80.9 - - - +
407A HIS* 1.3 65.5 + - - +
409A ARG* 3.1 20.1 + - - +
410A ASN* 3.2 10.4 + - - -
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Residues in contact with HIS 407 (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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403A GLU 3.3 11.5 + - - +
404A LEU* 3.8 11.0 - - + +
405A ILE 3.3 0.4 - - - -
406A ASN* 1.3 79.2 - - - +
408A TYR* 1.3 96.8 + + - +
410A ASN* 3.3 23.7 - - + +
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Residues in contact with TYR 408 (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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392A PHE* 3.3 41.0 - + - -
404A LEU* 3.3 31.1 + - + +
405A ILE* 4.2 4.0 - - - +
406A ASN 3.2 0.8 - - - -
407A HIS* 1.3 105.6 + + - +
409A ARG* 1.3 61.1 + - - +
410A ASN* 3.2 13.4 - - - +
423A LYS* 3.7 9.9 + - + +
424A LEU* 3.3 16.5 - - + +
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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
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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