Contacts of the helix formed by residues 252 - 257 (chain U) in PDB entry 2FD6
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 LEU 252 (chain U).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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49U GLU* 3.8 41.7 - - + +
51U THR* 5.0 7.6 - - + -
53U ARG* 5.2 2.0 - - - +
151U PRO* 4.0 37.5 + - + +
152U GLY* 5.6 3.4 - - - +
157U ASN* 5.7 1.6 - - - +
246U MET* 4.4 19.0 - - - +
248U GLN 5.2 10.3 - - - +
253U GLY* 1.3 67.0 + - - +
254U ASP* 3.3 8.8 + - - +
255U ALA* 3.6 11.6 + - - +
256U PHE* 3.8 13.3 - - - -
261U ILE* 4.2 19.5 - - + -
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Residues in contact with GLY 253 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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252U LEU* 1.3 73.9 - - - +
254U ASP* 1.3 54.8 + - - +
255U ALA 3.0 3.4 - - - -
256U PHE* 2.7 24.5 + - - -
257U SER 2.8 10.6 + - - -
258U MET* 3.1 22.6 + - - -
259U ASN 4.5 3.4 + - - -
261U ILE* 3.5 31.2 - - - +
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Residues in contact with ASP 254 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23A LYS* 3.4 35.8 - - - +
24A TYR* 3.6 24.2 - - + -
50U LYS* 3.2 25.8 + - - +
53U ARG* 2.6 36.3 + - - -
151U PRO* 3.5 10.5 - - + +
252U LEU* 3.3 6.5 - - - +
253U GLY* 1.3 74.7 - - - +
255U ALA* 1.3 60.6 + - - +
257U SER* 3.4 12.4 + - - +
258U MET 4.3 4.7 + - - +
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Residues in contact with ALA 255 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23A LYS* 4.2 11.0 + - - +
24A TYR* 4.9 2.4 - - - +
159U PHE* 6.0 1.9 - - + -
164U THR* 5.1 8.3 - - - +
166U HIS* 3.6 50.6 - - + +
246U MET* 5.2 4.5 - - + -
252U LEU 3.6 10.9 + - - +
253U GLY 3.0 0.6 - - - -
254U ASP* 1.3 79.1 - - - +
256U PHE* 1.3 70.8 + - + +
257U SER* 3.4 2.2 + - - -
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Residues in contact with PHE 256 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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159U PHE* 3.7 43.1 - + + -
223U LEU* 4.1 29.2 - - + -
225U ALA* 4.6 0.2 - - + -
236U TYR* 4.0 11.6 - - - -
238U VAL* 4.3 18.9 - - + +
246U MET* 4.3 18.6 - - + -
252U LEU 3.8 15.7 - - - -
253U GLY* 2.7 9.7 + - - +
255U ALA* 1.3 81.3 - - + +
257U SER* 1.3 68.4 + - - +
258U MET* 3.0 36.8 + - + +
261U ILE* 3.6 27.6 - - + -
263U VAL* 5.2 0.9 - - + -
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Residues in contact with SER 257 (chain U).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23A LYS* 5.5 5.8 - - - +
229U HIS* 3.1 41.3 - - - -
253U GLY 2.8 4.4 + - - -
254U ASP* 3.4 13.3 + - - +
255U ALA 3.4 1.9 + - - -
256U PHE* 1.3 80.5 - - - +
258U MET* 1.3 61.8 + - - +
259U ASN* 5.1 1.7 - - - +
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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