Contacts of the helix formed by residues 259 - 263 (chain X) in PDB entry 1G3I
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 ILE 259 (chain X).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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54X LEU* 5.2 2.9 - - + -
83X ALA* 5.0 1.8 - - - -
256X ILE* 4.4 24.2 - - + +
257X ASP 4.3 1.1 - - - -
258X GLU* 1.3 71.6 - - - +
260X ASP* 1.3 73.5 + - - +
261X LYS 2.9 3.0 - - - -
262X ILE* 2.6 50.8 + - + +
263X CYS* 4.1 0.6 - - - -
282X LEU* 6.1 1.8 - - + -
307X ALA* 4.1 22.4 - - + -
308X SER 3.0 22.6 + - - +
311X PHE* 3.6 22.2 - - + -
319X LEU* 4.5 14.6 - - + -
323X LEU* 4.5 20.4 - - + -
327X LEU* 5.2 3.6 - - + -
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Residues in contact with ASP 260 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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258X GLU* 3.9 6.4 - - - +
259X ILE* 1.3 79.8 + - - +
261X LYS* 1.3 73.4 + - - +
262X ILE 2.6 12.3 + - - -
263X CYS* 2.9 26.6 + - - +
309X GLY* 3.0 27.7 - - - -
310X ALA* 3.2 9.0 + - - +
311X PHE* 3.1 42.4 + - + +
312X GLN* 5.1 3.8 + - - -
313X VAL* 4.6 19.3 - - + +
314X ALA* 5.1 3.4 - - + +
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Residues in contact with LYS 261 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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276W GLU* 5.3 5.9 + - - -
280W ARG* 3.4 36.5 - - - +
82X GLU* 5.2 1.3 - - - +
83X ALA* 5.5 5.2 - - + -
258X GLU* 4.0 33.2 - - + +
259X ILE 2.7 4.0 + - - -
260X ASP* 1.3 83.9 - - - +
262X ILE* 1.3 62.1 + - + +
263X CYS 3.6 0.9 - - - -
275X ARG* 3.7 26.9 + - - +
312X GLN* 5.3 9.3 - - - +
313X VAL* 6.5 0.9 - - + -
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Residues in contact with ILE 262 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
83X ALA* 3.4 33.9 - - + -
256X ILE* 6.1 0.2 - - + -
259X ILE* 2.6 41.8 + - + +
260X ASP 2.6 5.1 + - - -
261X LYS* 1.3 79.5 - - + +
263X CYS* 1.3 59.3 + - - +
264X LYS 4.2 0.2 + - - -
275X ARG* 2.6 41.3 - - + +
276X GLU* 4.2 0.5 + - - -
278X VAL* 4.4 14.6 - - + -
279X GLN* 3.0 49.1 - - + +
282X LEU* 5.5 7.0 - - + -
323X LEU* 5.7 0.7 - - + -
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Residues in contact with CYS 263 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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259X ILE 4.1 1.1 - - - -
260X ASP* 2.9 33.6 + - - +
261X LYS 3.6 0.2 - - - -
262X ILE* 1.3 82.1 - - - +
264X LYS* 1.3 65.3 + - - +
265X LYS 3.3 11.4 + - - +
275X ARG* 4.4 14.6 + - - -
279X GLN* 4.1 2.2 - - - -
311X PHE* 4.4 7.4 - - - -
314X ALA* 3.9 23.3 - - + -
315X ARG 4.9 0.2 - - - -
318X ASP* 3.6 14.6 - - + +
319X LEU* 3.3 32.3 - - - -
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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