Contacts of the helix formed by residues 366 - 372 (chain A) in PDB entry 2XH1
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 366 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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360A VAL* 3.8 26.7 - - + -
363A ILE* 4.4 9.4 - - + -
365A ASP* 1.3 72.7 - - - +
367A LYS* 1.3 60.6 + - - +
368A GLU 3.2 2.9 - - - -
369A LEU* 2.8 35.0 + - + -
370A ILE* 2.8 15.5 + - - +
383A PRO* 4.6 6.5 - - + -
395A SER 3.0 16.5 + - - +
396A PRO* 3.7 22.0 - - + +
397A TYR 3.3 24.9 - - - +
398A LEU* 4.3 16.8 - - + -
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Residues in contact with LYS 367 (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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365A ASP* 3.1 21.4 + - - +
366A VAL* 1.3 79.4 - - - +
368A GLU* 1.3 61.1 + - - +
370A ILE* 4.5 0.7 - - - -
371A GLU* 3.1 68.4 + - - +
372A GLU* 5.6 0.2 - - - +
383A PRO* 3.9 11.9 - - + -
385A ASN* 3.4 32.6 - - + +
391A SER 4.6 8.1 + - - -
392A SER* 5.8 2.0 - - - +
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Residues in contact with GLU 368 (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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365A ASP* 3.7 11.7 + - - +
366A VAL 3.2 0.2 - - - -
367A LYS* 1.3 77.4 - - - +
369A LEU* 1.3 61.5 + - - +
372A GLU* 3.3 43.1 + - + +
373A LYS* 3.5 34.9 + - - +
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Residues in contact with LEU 369 (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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360A VAL* 5.4 0.2 - - + -
363A ILE* 4.0 29.2 - - + -
365A ASP 5.4 0.9 - - - +
366A VAL* 2.8 29.7 + - + +
368A GLU* 1.3 75.8 - - - +
370A ILE* 1.3 62.6 + - + +
373A LYS* 3.4 26.9 - - - +
374A ALA* 3.0 25.7 + - + +
398A LEU* 5.7 0.9 - - + -
417A LEU* 4.0 20.2 - - + -
420A LEU* 3.8 40.8 - - + +
421A ILE* 4.2 7.0 - - + -
424A SER* 4.1 6.5 - - - +
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Residues in contact with ILE 370 (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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366A VAL 2.8 19.2 + - - +
367A LYS 4.3 0.4 - - - +
369A LEU* 1.3 80.9 - - + +
371A GLU* 1.3 70.7 + - - +
372A GLU 2.8 10.6 + - - -
374A ALA* 3.7 23.7 + - + +
375A VAL* 3.8 6.7 - - + +
380A LEU* 3.4 20.0 - - + -
381A MET* 3.2 42.2 - - + +
383A PRO* 3.4 35.9 - - + -
398A LEU* 3.7 26.9 - - + -
417A LEU* 6.1 1.8 - - + -
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Residues in contact with GLU 371 (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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367A LYS* 3.1 47.3 + - - +
370A ILE* 1.3 82.0 - - + +
372A GLU* 1.3 62.3 + - + +
375A VAL* 3.7 15.2 - - - +
382A LEU* 6.0 0.5 - - - +
383A PRO* 3.6 23.1 - - + +
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Residues in contact with GLU 372 (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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368A GLU* 3.3 28.6 + - + +
370A ILE 2.8 2.0 + - - -
371A GLU* 1.3 83.9 - - + +
373A LYS* 1.3 69.2 + - + +
374A ALA 3.5 1.1 - - - -
375A VAL* 3.2 19.0 - - - +
376A LYS* 3.4 22.9 - - - +
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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