Contacts of the helix formed by residues 295 - 300 (chain B) in PDB entry 1EQR
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 295 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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293B THR* 3.8 18.8 - - + +
294B ASP* 1.3 81.3 - - - +
296B ALA* 1.3 66.8 + - - +
297B ASP* 3.3 8.1 - - - -
298B LEU* 3.0 31.1 + - + +
299B LEU* 3.5 13.6 - - + +
318B VAL* 3.1 29.7 + - + +
320B ALA* 4.0 12.6 - - + -
380B ILE* 4.3 16.6 - - + -
383B ARG* 4.2 7.4 - - + +
384B THR* 4.7 1.3 - - + -
394B PHE* 4.1 17.5 - - + -
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Residues in contact with ALA 296 (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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294B ASP* 3.7 6.4 - - + +
295B VAL* 1.3 78.4 - - - +
297B ASP* 1.3 58.0 + - - +
299B LEU* 2.7 28.0 + - - +
300B LYS* 3.2 13.2 + - - +
310B PRO 5.2 0.2 - - - +
311B ALA* 3.7 31.2 - - - +
317B ARG* 5.1 3.6 - - - -
318B VAL* 3.9 24.9 + - + +
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Residues in contact with ASP 297 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
294B ASP* 4.5 2.6 - - - +
295B VAL* 3.6 5.7 - - - -
296B ALA* 1.3 75.9 + - - +
298B LEU* 1.3 64.3 + - - +
299B LEU 3.2 0.4 - - - -
300B LYS* 4.2 11.1 - - - +
383B ARG* 2.5 40.2 + - - -
590C ASN* 3.4 44.3 + - - +
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Residues in contact with LEU 298 (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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295B VAL* 3.0 17.4 + - + +
296B ALA 2.9 1.2 + - - -
297B ASP* 1.3 85.0 - - - +
299B LEU* 1.3 62.0 + - + +
300B LYS 3.7 0.4 - - - -
376B ILE* 3.7 27.2 - - + +
379B ASP* 3.7 29.2 - - + +
380B ILE* 3.5 43.5 - - + +
383B ARG* 3.6 39.9 - - - +
590C ASN* 4.9 3.2 + - - +
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Residues in contact with LEU 299 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
295B VAL* 3.5 19.1 - - + +
296B ALA 2.7 7.0 + - - +
298B LEU* 1.3 82.3 - - + +
300B LYS* 1.3 61.3 + - - +
301B SER 3.1 4.8 + - - -
302B VAL* 3.5 28.0 + - + +
307B PHE* 4.0 28.9 - - + -
308B ALA* 3.9 8.1 - - - -
311B ALA* 4.2 4.5 - - + -
318B VAL* 3.5 33.7 - - + -
372B LEU* 3.9 24.0 - - + -
376B ILE* 3.6 26.2 - - + -
380B ILE* 4.3 7.6 - - + -
394B PHE* 5.3 1.6 - - + -
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Residues in contact with LYS 300 (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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296B ALA* 3.2 10.6 + - - +
297B ASP* 4.3 10.6 - - - +
298B LEU 3.7 0.2 - - - -
299B LEU* 1.3 76.8 - - - +
301B SER* 1.3 58.5 + - - +
302B VAL 4.9 0.2 - - - +
308B ALA* 4.7 2.7 - - - +
311B ALA* 3.4 24.3 + - - +
312B ASN* 2.7 57.6 + - - +
588C GLU* 4.4 9.4 - - + +
589C ASN* 3.4 22.9 - - - +
590C ASN* 3.0 52.5 + - - +
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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