Contacts of the helix formed by residues 486 - 490 (chain A) in PDB entry 3IAD
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 SER 486 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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268A TRP* 3.8 23.6 - - - -
333A ASP* 3.8 8.8 + - - -
337A SER* 3.8 12.1 + - - -
482A CYS 3.3 9.6 - - - -
483A ALA* 2.8 24.9 + - - -
484A ASP 3.4 2.6 + - - -
485A LEU* 1.3 75.0 - - - +
487A ASN* 1.3 69.0 + - - +
488A PRO* 3.2 4.3 - - - -
489A THR* 2.8 26.2 + - - -
490A LYS* 3.5 9.8 + - - +
547A TRP* 4.0 4.0 - - - +
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Residues in contact with ASN 487 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
325A TYR* 2.6 39.9 + - - -
330A HIS* 5.2 1.9 + - - -
333A ASP* 4.0 10.0 - - - +
484A ASP 4.7 3.8 + - - +
485A LEU 5.8 0.2 - - - -
486A SER* 1.3 78.3 + - - +
488A PRO* 1.3 67.9 - - + +
490A LYS* 3.2 21.6 + - - +
495A TYR* 3.4 24.2 - - + +
498A TRP* 3.1 44.1 + - + +
901A 15X 3.8 17.1 - - - -
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Residues in contact with PRO 488 (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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485A LEU 3.9 12.3 - - - +
486A SER 3.3 5.2 - - - -
487A ASN* 1.3 93.0 - - + +
489A THR* 1.3 55.4 + - - +
490A LYS 3.4 0.2 - - - -
495A TYR* 3.6 35.2 - - + +
538A PHE* 3.8 28.3 - - + -
539A ILE* 4.2 5.2 - - + -
543A VAL* 4.1 9.0 - - + -
565A LEU* 3.4 28.9 - - + +
568A ASN* 2.8 24.8 + - - +
901A 15X 5.8 0.4 - - + -
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Residues in contact with THR 489 (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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268A TRP* 2.9 36.0 + - - -
486A SER* 2.8 18.2 + - - +
488A PRO* 1.3 76.0 - - - +
490A LYS* 1.3 62.5 + - - +
543A VAL* 4.6 2.0 - - + -
547A TRP* 3.7 40.4 - - + +
561A ILE* 3.5 19.2 - - + +
562A LEU* 6.1 0.2 - - - -
564A THR* 3.4 18.6 - - - +
565A LEU* 4.0 23.1 - - + +
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Residues in contact with LYS 490 (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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268A TRP* 3.4 46.7 - - + +
269A GLY* 4.1 14.3 - - - +
270A LEU 5.7 2.4 + - - +
333A ASP* 3.0 30.0 + - - +
336A GLN* 4.4 8.5 + - - -
337A SER* 3.2 17.3 + - - -
486A SER* 3.6 15.3 - - - +
487A ASN* 3.2 18.2 + - - +
489A THR* 1.3 78.5 - - - +
491A PRO* 1.3 75.7 - - + +
494A LEU* 4.2 15.8 - - + +
495A TYR* 4.3 0.7 - - - +
498A TRP* 5.5 3.8 - - - +
564A THR* 3.4 2.7 - - - +
568A ASN* 2.8 25.3 + - - -
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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