Contacts of the helix formed by residues 388 - 395 (chain B) in PDB entry 3IH9
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 388 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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314B GLY* 3.9 3.1 - - - -
317B VAL* 3.5 29.4 - - + +
342B ALA* 3.5 23.1 - - + +
345B ASP* 3.3 21.1 - - - +
346B ALA* 3.6 17.7 - - - -
349B ASP* 4.1 10.7 - - - +
385B GLY* 3.2 18.9 + - - +
387B ALA* 1.3 76.1 - - - +
389B HIS* 1.3 58.3 + - - +
391B ALA* 2.8 28.9 + - - +
392B ALA 4.1 0.7 + - - -
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Residues in contact with HIS 389 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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349B ASP* 5.2 2.7 - - - -
376B ARG* 3.6 45.9 + - + +
377B ALA* 4.0 26.6 - - + +
380B SER* 4.0 11.9 + - - -
385B GLY 4.8 0.2 + - - -
386B GLY 3.0 28.4 + - - -
387B ALA* 3.6 11.4 - - + -
388B VAL* 1.3 74.5 + - - +
390B GLU* 1.3 78.0 + - + +
392B ALA* 3.1 17.6 + - - +
393B ALA* 3.2 8.0 + - - +
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Residues in contact with GLU 390 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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318B ARG 5.2 0.2 - - - +
319B PHE* 3.2 12.4 - - - +
320B VAL* 2.6 53.8 + - + +
387B ALA* 3.1 28.4 + - - +
388B VAL 2.9 0.4 + - - -
389B HIS* 1.3 97.6 + - + +
391B ALA* 1.3 60.4 + - - +
393B ALA* 3.2 12.6 - - + +
394B ALA* 3.1 17.7 + - - +
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Residues in contact with ALA 391 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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320B VAL* 3.6 23.3 - - + +
329B LEU* 5.2 1.1 - - + -
346B ALA* 3.1 35.4 - - + +
349B ASP* 3.7 5.1 - - + +
350B LEU* 3.2 25.5 - - + +
388B VAL 2.8 13.9 + - - +
390B GLU* 1.3 77.0 - - - +
392B ALA* 1.3 64.9 + - - +
394B ALA* 3.3 8.3 + - - +
395B ALA 3.3 3.6 + - - -
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Residues in contact with ALA 392 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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349B ASP* 3.6 30.7 + - + +
351B ARG* 5.4 8.4 + - - +
376B ARG* 3.2 40.7 + - - +
389B HIS 3.1 4.9 + - - +
391B ALA* 1.3 77.9 - - - +
393B ALA* 1.3 62.5 + - - +
395B ALA* 3.3 11.0 + - - +
396B ALA* 3.3 11.8 + - - +
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Residues in contact with ALA 393 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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376B ARG* 4.2 13.9 - - - +
389B HIS* 3.2 8.4 + - + +
390B GLU* 3.2 20.8 + - + +
391B ALA 3.1 0.4 - - - -
392B ALA* 1.3 75.3 - - - +
394B ALA* 1.3 60.4 + - - +
396B ALA* 2.9 28.3 + - - +
397B ARG* 3.9 8.5 + - - +
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Residues in contact with ALA 394 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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320B VAL* 4.3 15.0 - - + +
322B ARG* 2.9 57.8 + - + +
327B VAL* 4.5 3.8 - - + -
350B LEU* 4.3 8.1 - - + -
390B GLU 3.1 9.1 + - - +
391B ALA 3.3 9.4 + - - +
393B ALA* 1.3 77.9 - - - +
395B ALA* 1.3 58.3 + - - +
396B ALA 3.1 3.3 + - - -
397B ARG* 3.4 10.5 + - - +
404B ILE* 5.1 1.3 - - - -
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Residues in contact with ALA 395 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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322B ARG* 4.9 1.1 - - - +
349B ASP 3.7 23.1 - - - +
350B LEU* 4.2 3.6 - - + +
351B ARG* 4.0 40.9 + - + +
391B ALA 3.3 3.2 + - - +
392B ALA* 3.3 7.8 + - - +
393B ALA 3.2 1.0 - - - -
394B ALA* 1.3 76.8 - - - +
396B ALA* 1.3 59.5 + - - +
397B ARG 3.3 1.1 + - - -
398B ASP* 3.7 18.1 + - - +
404B ILE* 5.0 7.0 - - + -
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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