Contacts of the helix formed by residues 351 - 355 (chain E) in PDB entry 3IFS
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 LEU 351 (chain E).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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341E ILE* 4.9 2.1 - - + +
347E ASP* 3.1 2.8 + - - -
349E ASP* 3.1 24.1 + - - +
350E GLY* 1.3 81.8 - - - +
352E ASN* 1.3 59.6 + - - +
353E TYR* 3.1 12.1 - - + +
354E LEU* 2.9 45.8 + - + +
355E ALA 3.9 1.7 + - - -
148F THR 5.5 3.1 - - - +
150F THR* 4.5 17.3 - - + +
153F ALA* 4.0 16.2 - - + -
154F LEU* 3.9 43.5 - - + +
157F ARG* 3.7 15.7 + - - +
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Residues in contact with ASN 352 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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343E SER* 3.5 9.7 - - - -
344E GLU 2.9 39.4 + - - -
345E GLU 5.0 0.8 + - - -
347E ASP* 2.9 38.4 + - - +
350E GLY 3.6 0.8 - - - -
351E LEU* 1.3 76.5 - - - +
353E TYR* 1.3 57.4 + - - +
354E LEU 3.0 0.2 - - - -
355E ALA* 3.0 27.6 + - - +
157F ARG* 2.7 26.9 + - - +
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Residues in contact with TYR 353 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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347E ASP* 5.1 1.0 + - - -
350E GLY 3.3 27.6 + - - -
351E LEU* 3.0 10.3 + - + +
352E ASN* 1.3 78.1 - - - +
354E LEU* 1.3 88.3 + - + +
355E ALA 3.4 3.2 + - - +
357E GLU* 5.0 3.6 - - - +
430F PHE* 4.8 2.1 - - - -
433F LEU* 3.7 29.3 - - - +
434F GLY 3.9 14.1 - - - -
435F LYS* 3.6 48.7 - - + +
436F PRO* 4.2 19.3 - - + -
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Residues in contact with LEU 354 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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341E ILE* 3.7 21.6 - - + +
351E LEU* 2.9 32.5 + - + +
353E TYR* 1.3 115.7 - - + +
355E ALA* 1.3 66.5 + - - +
356E GLY 3.2 0.3 + - - -
357E GLU* 2.9 27.1 + - + +
361E PHE* 4.1 20.2 - - + -
362E VAL* 4.0 20.9 - - + -
150F THR* 5.7 2.7 - - + -
154F LEU* 5.5 2.9 - - + -
433F LEU* 4.0 24.7 - - + +
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Residues in contact with ALA 355 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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341E ILE* 3.4 11.2 - - - +
342E GLU 4.0 0.7 - - - +
343E SER* 3.7 37.5 - - - +
351E LEU 3.9 1.6 + - - -
352E ASN* 3.0 19.1 + - - +
353E TYR 3.4 3.3 - - - +
354E LEU* 1.3 77.9 - - - +
356E GLY* 1.3 58.7 + - - +
357E GLU* 3.5 3.3 + - - +
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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