Contacts of the helix formed by residues 488 - 494 (chain B) in PDB entry 2X1L
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 ASP 488 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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37B ARG 4.8 4.4 - - - +
38B LEU* 3.7 30.8 - - - +
40B GLY* 6.1 1.1 - - - -
463B LEU* 4.4 4.0 - - - +
485B ASP 5.7 2.6 - - - +
486B GLU 3.7 0.2 - - - -
487B ARG* 1.3 84.2 - - - +
489B PHE* 1.3 65.7 + - - +
490B SER* 3.1 18.7 + - - +
491B ALA* 3.1 18.1 + - - +
492B ILE* 4.3 1.0 + - - +
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Residues in contact with PHE 489 (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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35B PHE* 3.3 56.3 - + - -
38B LEU* 2.9 41.2 + - + +
39B ASP* 3.5 20.6 - - + +
397B LEU* 3.8 28.2 - - + +
401B ARG* 5.2 0.2 - - - +
463B LEU* 3.2 26.0 - - + -
464B LEU* 3.9 11.2 - - + -
466B GLN* 5.0 0.7 - - - -
467B PRO* 4.0 12.8 - - + -
488B ASP* 1.3 72.6 - - - +
490B SER* 1.3 60.2 + - - +
491B ALA 3.2 0.4 - - - -
492B ILE* 3.3 38.8 + - + +
493B ALA 4.5 0.7 + - - -
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Residues in contact with SER 490 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
38B LEU 4.7 0.4 + - - -
488B ASP* 3.9 14.8 + - - +
489B PHE* 1.3 78.4 - - - +
491B ALA* 1.3 63.3 + - - +
492B ILE 3.2 0.7 + - - -
493B ALA* 3.5 18.7 + - - +
494B ASN* 4.0 8.4 + - - -
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Residues in contact with ALA 491 (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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459B ARG* 2.8 20.2 + - - -
463B LEU* 4.4 4.9 - - + -
482B GLN* 3.9 9.8 + - - +
486B GLU* 3.3 37.2 - - + +
488B ASP 3.1 14.5 + - - +
490B SER* 1.3 79.3 + - - +
492B ILE* 1.3 61.9 + - - +
493B ALA 3.2 0.4 - - - -
494B ASN* 3.1 25.2 + - + +
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Residues in contact with ILE 492 (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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393B ALA 5.6 1.1 - - - +
394B ASP* 5.1 9.6 - - - +
397B LEU* 4.1 20.9 - - + -
456B GLU* 4.4 2.3 - - - +
459B ARG* 3.0 24.7 + - - +
460B ILE* 3.9 30.0 - - + +
463B LEU* 3.7 24.0 - - + -
464B LEU* 3.8 27.1 - - + -
489B PHE* 3.4 43.3 - - + +
490B SER 3.2 1.0 - - - -
491B ALA* 1.3 76.7 - - - +
493B ALA* 1.3 59.0 + - - +
495B ARG* 5.1 1.7 + - - -
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Residues in contact with ALA 493 (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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397B LEU* 6.0 0.4 - - - +
489B PHE 4.5 0.8 + - - +
490B SER* 3.5 12.6 + - - +
491B ALA 3.2 0.4 - - - -
492B ILE* 1.3 78.4 - - - +
494B ASN* 1.3 64.5 + - - +
495B ARG* 3.6 8.5 + - - +
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Residues in contact with ASN 494 (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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459B ARG* 2.9 25.9 + - - -
482B GLN* 5.7 0.2 + - - -
486B GLU* 5.3 9.5 + - - +
490B SER 4.0 14.4 + - - -
491B ALA* 3.1 13.6 + - + +
493B ALA* 1.3 80.4 - - - +
495B ARG* 1.3 67.0 + - - +
496B ILE* 4.6 0.2 - - - -
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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