Contacts of the helix formed by residues 251 - 255 (chain A) in PDB entry 6A08
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 ASN 251 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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34A SER* 3.6 14.3 + - - +
38A ASN* 3.0 41.2 + - - -
156A ASP* 4.2 1.8 - - - -
231A LEU* 3.8 10.4 - - + +
250A SER* 1.3 72.4 + - - +
252A HIS* 1.3 68.1 + - - +
253A GLY 3.4 1.4 + - - +
254A GLY* 3.1 16.9 + - - -
255A ARG 4.0 1.7 + - - -
256A GLN* 4.2 7.3 + - - +
257A LEU 5.2 2.1 + - - +
260A ALA* 3.4 31.3 + - + -
261A VAL 3.4 20.2 + - - +
262A PRO* 3.6 4.1 - - - +
263A GLY 4.5 2.4 - - - +
283A ASP* 4.6 2.1 + - - +
284A GLY* 5.4 0.5 - - - -
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Residues in contact with HIS 252 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
128A TYR* 3.2 21.3 - - - -
154A THR* 3.9 2.2 - - + -
156A ASP* 2.9 28.8 + - - +
157A VAL* 3.4 16.0 - - + +
228A LYS* 4.1 5.0 + - - +
250A SER* 2.9 15.3 + - - -
251A ASN* 1.3 80.5 - - - +
253A GLY* 1.3 61.5 + - - +
255A ARG* 3.0 20.9 + - + +
256A GLN* 3.6 21.9 + - + +
402A FMN 3.4 35.7 + + - -
404A 173 2.6 34.6 + - - -
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Residues in contact with GLY 253 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
35A LEU* 3.4 10.4 - - - +
38A ASN* 3.8 16.3 - - - +
250A SER* 4.5 0.4 + - - -
251A ASN* 3.3 2.8 + - - -
252A HIS* 1.3 76.5 - - - +
254A GLY* 1.3 59.0 + - - +
283A ASP* 4.8 1.0 + - - -
284A GLY* 5.2 0.2 - - - -
307A ARG* 2.9 32.0 + - - -
402A FMN 3.4 31.1 + - - -
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Residues in contact with GLY 254 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
28A GLY* 3.2 5.6 - - - -
29A SER* 2.8 26.4 + - - +
32A GLU* 5.2 0.7 - - - -
34A SER* 3.9 16.1 - - - -
35A LEU* 3.8 23.7 + - - +
38A ASN* 3.8 0.4 - - - +
251A ASN* 3.1 16.8 + - - -
252A HIS 3.1 1.0 - - - -
253A GLY* 1.3 77.8 - - - +
255A ARG* 1.3 58.9 + - - +
256A GLN 3.5 2.9 - - - -
257A LEU 5.3 0.9 - - - -
258A ASP* 5.4 0.3 - - - +
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Residues in contact with ARG 255 (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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24A PHE* 2.8 41.0 + - - -
25A LEU 3.5 2.4 + - - -
27A GLY 2.9 34.3 + - - +
28A GLY* 4.2 0.9 - - - -
29A SER* 3.6 13.9 - - - +
161A GLY* 3.5 14.6 + - - -
163A ARG* 3.5 28.8 + - - +
252A HIS* 3.0 24.2 + - + +
253A GLY* 3.7 0.7 - - - +
254A GLY* 1.3 77.7 - - - +
256A GLN* 1.3 70.3 + - - +
307A ARG* 3.6 12.3 - - - +
402A FMN 3.5 38.4 - - - +
404A 173 2.5 36.7 + - - +
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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