Contacts of the helix formed by residues 321 - 324 (chain A) in PDB entry 5C4B
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 PRO 321 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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96A TRP* 3.8 18.4 - - + -
232A LEU* 3.7 30.3 - - + +
234A PRO* 4.0 5.8 - - + -
237A TYR* 3.7 33.7 - - + -
320A SER* 1.3 84.0 - - - +
322A GLU* 1.3 63.7 + - - +
323A TYR 2.9 3.1 + - - +
324A LEU 3.2 20.8 + - - +
325A TRP* 3.5 33.6 - - + +
336A LEU* 4.4 3.6 - - + -
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Residues in contact with GLU 322 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
81A ARG* 4.1 4.0 + - - -
96A TRP* 3.5 12.7 - - - +
97A GLU* 2.8 33.0 + - - +
320A SER* 3.1 17.4 + - - +
321A PRO* 1.3 76.1 - - - +
323A TYR* 1.3 64.2 + - + +
324A LEU 3.4 0.6 + - - -
325A TRP* 4.9 1.7 - - - +
336A LEU* 3.8 18.4 - - + +
337A ARG 4.5 4.2 + - - -
338A LYS 3.4 26.5 - - - +
339A LEU* 3.9 2.6 - - - +
340A ARG* 2.8 66.4 + - - +
341A PHE 3.6 3.1 + - - +
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Residues in contact with TYR 323 (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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95A VAL* 3.5 28.7 - - + +
220A VAL* 4.2 20.9 - - + -
223A GLU* 2.7 35.5 + - - +
224A ILE* 3.5 26.7 - - + -
231A THR* 4.1 3.8 - - + -
269A PHE* 3.1 33.1 - + + -
319A LEU* 3.8 23.3 - - + -
320A SER* 3.1 20.4 + - - +
321A PRO 2.9 0.8 - - - -
322A GLU* 1.3 82.5 - - + +
324A LEU* 1.3 57.6 + - - +
340A ARG* 3.3 42.5 + - - -
341A PHE* 3.2 12.8 - - - +
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Residues in contact with LEU 324 (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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214A MET* 3.7 35.7 - - + -
231A THR* 4.4 5.5 - - + +
234A PRO* 3.3 31.2 - - + +
266A LEU* 3.6 39.2 - - + +
268A GLY* 3.8 29.6 - - - +
269A PHE* 4.1 4.9 - - + -
321A PRO* 3.2 11.6 + - - +
322A GLU 3.4 0.4 - - - -
323A TYR* 1.3 80.0 - - - +
325A TRP* 1.3 67.1 + - - +
341A PHE* 3.3 14.6 - - + -
343A ALA* 5.5 2.0 - - + +
402A DA8 5.3 7.9 - - + +
404A UPG 6.2 0.2 - - - -
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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