Contacts of the helix formed by residues 154 - 158 (chain A) 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 ALA 154 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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124A THR* 4.8 3.8 - - - +
128A MET* 4.1 23.3 - - + -
131A LEU* 5.3 4.0 - - + -
151A HIS 5.3 0.7 - - - +
152A GLY 3.4 3.6 - - - -
153A HIS* 1.3 77.8 - - - +
155A ASP* 1.3 54.8 + - - +
156A MET 3.2 2.5 - - - +
157A PHE* 2.7 53.8 + - + -
158A LEU* 3.4 2.0 + - - -
128B MET* 3.5 24.7 - - + +
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Residues in contact with ASP 155 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
153A HIS 3.2 2.4 + - - -
154A ALA* 1.3 68.1 - - - +
156A MET* 1.3 62.1 + - + +
158A LEU* 3.3 21.3 + - - +
159A VAL* 4.9 1.2 - - - +
175A GLY 4.7 1.2 - - - +
176A VAL* 3.7 41.1 - - + +
177A PRO* 4.2 8.5 - - - +
180A THR* 5.0 7.9 + - + +
128B MET* 4.9 5.8 - - - +
132B ARG* 2.6 41.0 + - - +
135B ARG* 4.7 8.5 + - - -
156B MET* 4.9 8.0 - - + +
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Residues in contact with MET 156 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
131A LEU* 3.8 26.0 - - + -
135A ARG* 3.0 43.1 - - - +
141A ASP 4.5 0.4 - - - +
143A ILE* 4.2 17.3 - - + -
154A ALA* 2.9 3.8 + - - +
155A ASP* 1.3 77.3 - - + +
157A PHE* 1.3 63.7 + - + +
158A LEU 3.3 0.4 - - - -
159A VAL* 3.6 6.3 - - - +
180A THR* 3.5 29.2 - - - +
181A THR* 5.5 2.7 - - - +
183A ASN* 3.7 27.1 - - + +
184A THR* 2.9 47.6 + - - +
180B THR* 5.8 2.7 - - + -
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Residues in contact with PHE 157 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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127A CYS* 3.8 25.4 - - + -
131A LEU* 3.5 35.2 - - + -
143A ILE* 5.0 10.1 - - + -
145A LYS* 4.2 18.9 - - + +
150A TYR* 5.9 0.3 - - - -
151A HIS* 3.5 42.6 + - + +
152A GLY 3.9 14.1 - - - +
154A ALA* 2.7 35.6 + - + +
156A MET* 1.3 73.4 - - + +
158A LEU* 1.3 56.1 + - - +
159A VAL 2.8 18.0 + - - +
161A ALA* 4.1 12.5 - - - +
184A THR* 5.9 0.7 - - + -
210A ILE* 4.2 33.7 - - + -
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Residues in contact with LEU 158 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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150A TYR* 5.1 0.4 - - + -
152A GLY 4.7 2.5 - - - +
153A HIS* 2.8 48.0 - - + +
154A ALA 3.4 6.2 + - - +
155A ASP* 3.3 11.1 + - - +
156A MET 3.3 2.8 - - - -
157A PHE* 1.3 77.1 - - - +
159A VAL* 1.3 59.7 + - - +
160A LYS 4.3 0.2 - - - -
161A ALA* 4.9 12.8 - - + -
165A VAL* 5.0 2.2 - - + -
172A SER* 3.7 2.6 - - - -
173A SER* 2.8 48.4 + - - +
176A VAL* 4.2 2.2 - - + -
132B ARG* 3.5 25.6 - - - +
301B TYR* 4.1 29.4 - - + +
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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
------------------------------------------------------------
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