Contacts of the helix formed by residues 488 - 493 (chain C) 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 C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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37C ARG 4.3 5.2 - - - +
38C LEU* 3.6 33.6 - - - +
40C GLY* 6.1 0.9 - - - -
463C LEU* 4.2 5.0 - - - +
485C ASP 5.5 3.4 - - - +
486C GLU 3.8 0.4 - - - -
487C ARG* 1.3 84.0 - - - +
489C PHE* 1.3 67.4 + - - +
490C SER* 3.1 15.4 + - - +
491C ALA* 3.2 17.3 + - + +
492C ILE 4.4 0.3 + - - -
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Residues in contact with PHE 489 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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35C PHE* 3.3 53.8 - + - -
38C LEU* 3.0 50.5 + - + +
39C ASP* 3.7 19.7 - - + +
397C LEU* 3.9 29.6 - - + +
401C ARG* 5.4 0.2 - - - +
463C LEU* 3.2 26.7 - - + -
464C LEU* 3.9 11.4 - - + -
466C GLN* 4.7 0.9 - - - -
467C PRO* 4.0 6.7 - - + -
488C ASP* 1.3 72.9 - - - +
490C SER* 1.3 60.6 + - - +
491C ALA 3.1 1.6 - - - -
492C ILE* 3.2 38.1 + - + +
493C ALA 4.5 0.5 + - - -
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Residues in contact with SER 490 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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38C LEU 4.7 0.6 + - - -
488C ASP* 4.0 13.8 - - - +
489C PHE* 1.3 77.4 - - - +
491C ALA* 1.3 59.9 + - - +
492C ILE 3.2 2.3 + - - -
493C ALA* 3.7 17.3 + - - +
494C ASN* 4.3 8.4 + - - -
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Residues in contact with ALA 491 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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459C ARG* 2.8 27.0 + - - -
463C LEU* 4.4 3.8 - - + -
482C GLN* 3.9 8.6 + - - +
486C GLU* 3.3 38.8 - - + +
487C ARG* 4.7 0.4 - - - -
488C ASP* 3.2 12.9 + - + +
489C PHE 3.1 1.2 - - - -
490C SER* 1.3 78.7 + - - +
492C ILE* 1.3 55.3 + - - +
493C ALA 3.3 1.1 - - - -
494C ASN* 3.2 21.3 + - + +
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Residues in contact with ILE 492 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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393C ALA 5.4 1.8 - - - +
394C ASP* 5.2 9.3 - - - +
397C LEU* 4.1 20.9 - - + +
456C GLU* 4.3 2.8 - - - +
459C ARG* 3.0 23.2 + - - +
460C ILE* 4.1 30.4 - - + +
463C LEU* 3.8 22.9 - - + -
464C LEU* 3.8 35.0 - - + -
489C PHE* 3.2 35.4 + - + +
491C ALA* 1.3 77.8 - - - +
493C ALA* 1.3 60.1 + - - +
494C ASN 4.2 0.2 - - - -
495C ARG* 5.3 1.2 + - - +
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Residues in contact with ALA 493 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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489C PHE 4.5 0.4 + - - -
490C SER* 3.7 12.8 + - - +
491C ALA 3.3 0.6 - - - -
492C ILE* 1.3 80.5 - - - +
494C ASN* 1.3 64.9 + - - +
495C ARG* 3.6 7.5 + - - +
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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