Contacts of the helix formed by residues 314 - 320 (chain A) in PDB entry 3KXM
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 THR 314 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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10A ARG* 5.4 13.0 - - + +
11A VAL* 4.1 37.7 - - + +
215A MET* 4.3 4.0 - - - -
312A ARG 4.5 3.8 - - - +
313A LEU* 1.4 75.2 - - - +
315A ALA* 1.3 65.1 + - - +
316A LEU* 3.7 6.9 + - - +
317A GLU* 3.0 37.8 + - - +
318A ALA* 3.0 20.4 + - - +
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Residues in contact with ALA 315 (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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141A LEU* 4.1 10.0 - - + +
144A LEU* 4.1 7.2 - - + -
145A ASP* 3.6 36.1 - - + +
148A HIS* 4.3 9.0 + - - +
215A MET* 3.8 28.3 - - - +
314A THR* 1.3 72.4 - - - +
316A LEU* 1.3 63.6 + - - +
318A ALA* 3.2 3.5 + - - +
319A MET* 3.2 26.5 + - - +
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Residues in contact with LEU 316 (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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12A TYR* 4.6 11.2 - - + +
145A ASP* 3.7 32.2 + - - +
314A THR* 3.2 7.4 + - - +
315A ALA* 1.3 78.5 - - - +
317A GLU* 1.3 61.7 + - + +
319A MET* 3.4 21.6 + - + +
320A THR* 3.6 17.2 + - + +
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Residues in contact with GLU 317 (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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10A ARG* 5.0 10.6 + - - -
312A ARG 4.3 1.4 - - - +
313A LEU* 3.5 29.4 - - + +
314A THR* 3.0 41.3 + - - +
316A LEU* 1.3 75.6 - - + +
318A ALA* 1.3 64.9 + - - +
320A THR* 2.8 24.8 + - - +
321A HIS* 3.6 6.1 + - - +
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Residues in contact with ALA 318 (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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141A LEU* 3.6 23.1 - - + -
215A MET* 4.3 6.3 - - + -
300A PHE* 3.6 25.1 - - + -
313A LEU* 4.0 10.5 - - + +
314A THR 3.0 12.9 + - - +
315A ALA 3.2 9.4 + - - +
317A GLU* 1.3 76.3 - - - +
319A MET* 1.4 59.1 + - - +
320A THR 3.0 0.4 - - - -
321A HIS* 3.0 25.8 + - - +
324A PHE* 3.3 12.6 - - - -
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Residues in contact with MET 319 (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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138A TYR* 3.3 50.9 - - + +
141A LEU* 3.5 27.6 - - + +
142A LYS* 3.5 44.6 - - + +
145A ASP* 4.6 10.5 - - - +
315A ALA 3.2 9.5 + - - +
316A LEU* 3.7 16.2 - - + +
317A GLU 3.1 0.8 - - - -
318A ALA* 1.4 78.4 - - - +
320A THR* 1.3 59.7 + - + +
324A PHE* 4.0 3.0 - - - +
328A ARG* 2.9 19.5 + - - -
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Residues in contact with THR 320 (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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316A LEU* 3.6 13.9 + - + +
317A GLU* 2.8 22.8 + - - +
318A ALA 3.0 1.4 - - - -
319A MET* 1.3 79.7 - - + +
321A HIS* 1.3 67.1 + - - +
322A PRO* 3.4 4.3 - - - +
328A ARG* 3.2 23.5 + - - +
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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