Contacts of the helix formed by residues 401 - 407 (chain A) in PDB entry 5I4A
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 LYS 401 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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304A GLN* 4.2 14.6 - - + +
307A GLU* 3.5 29.7 + - - +
308A VAL* 4.0 11.9 - - + +
375A LEU* 4.9 7.9 - - + -
376A LEU 2.7 20.1 + - - +
377A ASP* 2.9 50.0 + - - +
399A ILE 3.5 2.1 + - - -
400A LEU* 1.3 71.6 - - - +
402A GLU* 1.3 61.5 + - - +
404A LEU* 3.1 10.3 + - - +
405A GLU* 2.9 45.7 + - - +
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Residues in contact with GLU 402 (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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377A ASP 3.2 23.7 - - - +
378A LYS* 4.3 9.1 - - - +
379A TYR 5.0 0.9 + - - -
400A LEU* 3.9 24.1 - - + +
401A LYS* 1.3 84.9 + - + +
403A LYS* 1.3 66.5 + - + +
405A GLU* 3.2 27.1 + - - +
406A ASP* 3.3 21.4 + - - +
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Residues in contact with LYS 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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399A ILE* 4.5 4.4 - - + +
400A LEU* 3.0 26.8 + - + +
402A GLU* 1.3 81.0 - - + +
404A LEU* 1.3 65.0 + - - +
406A ASP* 4.2 2.0 - - - +
407A ILE* 3.4 19.6 + - - +
408A LYS 4.6 2.3 + - - -
411A ILE* 4.4 26.1 - - + +
412A ILE* 4.8 4.3 - - - +
2B A 2.8 73.9 + - + +
3B U 4.2 12.7 + - - -
4B A 5.8 2.2 - - - +
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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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308A VAL* 5.1 6.5 - - + -
311A SER* 3.1 22.7 - - - -
312A LEU* 4.4 16.6 - - + -
315A LEU* 3.6 25.7 - - + +
316A PHE* 5.2 7.4 - - + -
373A ILE* 5.0 5.6 - - + -
375A LEU* 3.8 37.2 - - + -
399A ILE* 3.8 34.8 - - + -
400A LEU 3.3 6.7 + - - +
401A LYS* 3.1 10.6 + - - +
403A LYS* 1.3 77.9 - - - +
405A GLU* 1.3 64.5 + - - +
406A ASP 3.4 0.2 - - - -
407A ILE* 3.1 10.7 - - - +
412A ILE* 5.1 7.0 - - + -
415A TYR* 5.6 4.3 - - + -
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Residues in contact with GLU 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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307A GLU* 4.2 17.1 - - - +
308A VAL* 3.7 19.5 - - + +
311A SER* 3.1 18.8 + - - +
401A LYS* 2.9 35.8 + - - +
402A GLU* 3.2 21.7 + - - +
404A LEU* 1.3 77.9 - - - +
406A ASP* 1.3 66.1 + - - +
407A ILE* 4.0 1.9 - - - +
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Residues in contact with ASP 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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402A GLU* 3.3 18.2 + - - +
403A LYS* 5.1 2.0 - - - +
405A GLU* 1.3 83.2 - - - +
407A ILE* 1.3 74.1 + - - +
408A LYS* 3.6 20.0 - - + +
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Residues in contact with ILE 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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311A SER* 3.6 24.0 - - - +
314A GLU* 3.4 28.0 - - + +
315A LEU* 3.9 27.6 - - + -
322A VAL* 4.5 8.7 - - + -
403A LYS 3.4 9.6 + - - -
404A LEU 3.1 17.5 - - - +
405A GLU 4.0 3.4 - - - +
406A ASP* 1.3 82.9 - - - +
408A LYS* 1.3 61.3 + - - +
409A PRO* 3.6 7.9 - - + +
412A ILE* 3.5 24.5 - - + -
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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