Contacts of the helix formed by residues 274 - 277 (chain B) in PDB entry 3GSB
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 274 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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68B GLY 3.4 24.7 - - - +
69B PRO* 3.8 9.8 - - - +
71B ILE* 3.8 27.6 - - + -
248B MET 5.2 2.2 - - - +
250B GLY 3.7 23.3 - - - +
251B PHE* 4.0 19.1 - - + -
252B ARG* 3.8 26.0 - - + +
272B GLY 2.9 5.3 + - - +
273B LYS* 1.3 79.3 - - + +
275B ILE* 1.3 58.2 + - - +
276B GLY 2.9 6.6 + - - -
277B GLY* 2.9 15.2 + - - -
319B THR* 3.7 28.0 - - + +
320B LEU* 4.7 1.3 - - + -
323B LEU* 4.2 3.6 - - + -
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Residues in contact with ILE 275 (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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103B LEU* 4.3 14.4 - - + +
107B VAL* 3.6 30.5 - - + -
119B PHE* 4.0 23.1 - - + -
251B PHE* 4.5 14.5 - - + -
271B LEU* 4.6 10.8 - - + -
272B GLY* 3.5 29.6 + - - +
273B LYS 3.1 0.8 + - - -
274B ILE* 1.3 78.0 - - - +
276B GLY* 1.3 57.1 + - - +
277B GLY 3.5 0.4 - - - -
281B VAL* 3.8 21.2 - - + +
282B GLY* 4.7 2.9 - - - -
283B ALA* 4.6 9.2 - - + -
312B ALA 4.5 1.4 - - - +
316B GLY* 3.1 19.3 - - - -
320B LEU* 4.7 11.0 - - + -
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Residues in contact with GLY 276 (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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273B LYS 3.0 8.5 + - - -
275B ILE* 1.3 78.9 - - - +
277B GLY* 1.3 65.1 + - - +
278B GLY 2.9 5.0 + - - -
279B LEU* 3.0 23.7 + - - +
281B VAL* 3.6 28.5 - - - +
312B ALA 4.4 5.1 - - - +
315B ALA* 3.8 12.6 - - - +
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Residues in contact with GLY 277 (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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91A THR* 3.5 12.1 + - - +
69B PRO* 5.0 8.5 - - - -
79B VAL* 4.5 13.1 - - - +
83B LEU* 5.9 0.2 - - - +
274B ILE 2.9 13.2 + - - -
275B ILE 3.5 0.8 - - - -
276B GLY* 1.3 77.3 - - - +
278B GLY* 1.3 56.6 + - - +
279B LEU* 5.3 0.3 - - - +
315B ALA* 3.8 11.9 + - - +
319B THR* 3.6 22.7 - - - -
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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