Contacts of the helix formed by residues 240 - 248 (chain A) in PDB entry 2HRB
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 SER 240 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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232A LYS* 2.7 31.2 + - - +
234A ASP* 2.9 34.8 - - - -
238A LYS 3.4 1.4 + - - -
239A ASP* 1.3 72.3 - - - +
241A ILE* 1.3 63.6 + - - +
242A ARG* 3.8 5.4 + - - +
243A THR* 2.8 41.3 + - - +
244A VAL* 3.1 8.7 + - - +
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Residues in contact with ILE 241 (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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234A ASP* 4.3 3.4 + - - +
239A ASP 3.5 3.8 + - - -
240A SER* 1.3 73.3 - - - +
242A ARG* 1.3 67.6 + - + +
244A VAL* 3.2 16.2 + - + -
245A GLU* 3.0 46.9 + - + +
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Residues in contact with ARG 242 (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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240A SER* 3.3 6.2 + - - +
241A ILE* 1.3 84.2 - - + +
243A THR* 1.3 61.4 + - + +
245A GLU* 3.3 8.4 + - - +
246A GLU* 2.8 52.7 + - + +
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Residues in contact with THR 243 (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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228A PRO 5.3 0.2 - - - +
230A PRO 5.0 3.9 - - - +
231A VAL* 3.2 28.9 - - - +
232A LYS* 3.3 31.2 + - + +
240A SER* 2.8 32.7 + - - +
242A ARG* 1.3 79.6 - - + +
244A VAL* 1.3 56.9 + - - +
246A GLU* 3.5 19.7 + - - +
247A GLY* 2.9 24.3 + - - -
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Residues in contact with VAL 244 (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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16A GLY* 3.6 37.7 - - - +
17A ILE* 3.8 15.2 - - + +
20A ALA* 3.7 9.1 - - + +
231A VAL* 4.0 7.2 - - + -
239A ASP* 3.6 31.0 - - + +
240A SER 3.1 17.2 + - - +
241A ILE* 3.4 23.8 - - + +
242A ARG 3.1 0.2 - - - -
243A THR* 1.3 78.1 - - - +
245A GLU* 1.3 63.4 + - + +
247A GLY* 3.2 13.5 + - - -
248A ALA 3.6 4.2 + - - -
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Residues in contact with GLU 245 (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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20A ALA* 3.9 17.9 - - + -
23A ARG* 3.8 22.6 + - - +
24A GLU* 5.6 2.4 - - - +
241A ILE* 3.0 36.0 + - + +
242A ARG* 3.7 8.4 - - - +
244A VAL* 1.3 73.3 - - - +
246A GLU* 1.3 62.5 + - - +
247A GLY 3.1 2.3 + - - -
248A ALA* 3.3 18.0 + - - +
249A GLU* 4.2 4.5 + - - +
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Residues in contact with GLU 246 (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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228A PRO 4.9 1.0 - - - +
242A ARG* 2.8 41.6 + - + +
243A THR* 3.6 28.7 - - - +
244A VAL 3.4 0.2 - - - -
245A GLU* 1.3 73.1 - - - +
247A GLY* 1.3 59.9 + - - +
249A GLU* 3.1 42.1 + - - +
250A THR 4.8 0.2 + - - -
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Residues in contact with GLY 247 (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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17A ILE* 3.9 12.3 - - - -
228A PRO* 3.3 35.9 - - - +
231A VAL* 5.4 0.9 - - - -
243A THR 2.9 14.5 + - - -
244A VAL 3.2 6.3 + - - -
245A GLU 3.1 1.6 - - - -
246A GLU* 1.3 77.7 - - - +
248A ALA* 1.3 55.3 + - - +
249A GLU 3.4 0.3 + - - -
250A THR* 4.4 0.9 + - - -
251A PRO* 3.1 22.0 - - - +
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Residues in contact with ALA 248 (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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17A ILE* 3.9 0.8 - - - +
20A ALA* 3.8 35.9 - - + +
21A ILE* 3.8 19.7 - - + +
24A GLU* 4.6 7.9 - - + -
244A VAL 3.6 4.0 + - - -
245A GLU 3.3 13.6 + - - +
246A GLU 3.2 0.4 - - - -
247A GLY* 1.3 75.2 - - - +
249A GLU* 1.3 56.8 + - - +
251A PRO* 3.3 2.8 - - - +
252A VAL* 2.9 36.4 + - + +
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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
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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