Contacts of the helix formed by residues 257 - 261 (chain B) in PDB entry 4GSA
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 GLY 257 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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246B GLU* 3.5 11.9 - - - -
249B THR 4.3 3.8 - - - -
250B GLY* 4.3 13.0 - - - -
251B PHE 4.3 1.4 - - - +
253B ILE* 4.5 2.9 - - - -
254B ALA* 3.3 26.1 + - - +
255B TYR 3.3 1.6 + - - -
256B GLY* 1.3 77.4 - - - +
258B VAL* 1.3 65.4 + - - -
259B GLN 3.2 0.2 - - - -
260B GLU 3.2 9.9 + - - -
261B LYS* 3.2 9.7 + - - +
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Residues in contact with VAL 258 (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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213B PRO* 3.5 32.3 - - + +
214B ILE* 4.0 11.0 - - + -
228B LEU* 4.3 5.4 - - + -
244B PHE* 5.0 0.7 - - + -
246B GLU* 2.8 18.1 + - - +
249B THR* 3.6 25.6 - - + +
253B ILE* 3.9 20.6 - - + -
257B GLY* 1.3 71.2 - - - -
259B GLN* 1.3 56.7 + - - +
261B LYS* 4.3 1.1 - - - -
262B PHE* 2.9 61.5 + - + +
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Residues in contact with GLN 259 (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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111B VAL* 3.5 14.5 - - - +
112B PRO* 3.7 12.0 - - + +
113B SER* 2.7 37.7 + - - -
244B PHE* 4.2 6.8 - - + -
246B GLU* 2.9 23.2 + - - +
256B GLY 3.1 18.8 + - - +
258B VAL* 1.3 75.5 - - - +
260B GLU* 1.3 56.3 + - - +
263B GLY* 3.1 26.5 + - - -
264B VAL* 3.2 27.1 + - - +
265B THR* 4.7 2.9 + - - -
266B PRO* 3.7 12.9 - - + +
269B THR* 3.3 29.5 + - - +
271B LEU* 5.9 0.6 - - - +
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Residues in contact with GLU 260 (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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110B ALA 4.3 6.4 - - - +
112B PRO* 4.4 14.8 - - + +
254B ALA* 3.6 7.3 - - + +
255B TYR* 3.6 16.0 + - - +
256B GLY* 3.0 39.9 + - - +
257B GLY 3.2 3.8 + - - +
259B GLN* 1.3 80.5 - - - +
261B LYS* 1.3 67.8 + - - +
262B PHE 3.3 0.7 + - - -
263B GLY* 3.4 8.8 + - - -
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Residues in contact with LYS 261 (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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253B ILE* 4.2 27.5 + - + +
254B ALA* 4.2 8.0 - - + +
257B GLY 3.2 13.1 + - - +
258B VAL* 3.8 3.6 - - - +
260B GLU* 1.3 83.1 - - - +
262B PHE* 1.3 81.6 + - + +
263B GLY 3.9 0.2 + - - -
333B ASP* 5.5 5.7 + - - -
359B VAL* 4.4 19.3 - - + -
360B SER* 6.0 2.2 - - - -
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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