Contacts of the helix formed by residues 322 - 328 (chain M) in PDB entry 4K4I
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 322 (chain M).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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259M LYS* 4.3 15.6 - - + +
260M LEU* 4.2 20.6 - - + -
263M LEU* 4.2 18.6 - - + -
312M LYS* 3.8 44.9 - - + +
315M GLU* 3.6 11.4 - - - +
316M ILE* 3.8 13.5 - - + -
321M HIS* 1.3 93.7 + - - +
323M ARG* 1.3 67.1 + - - +
324M LYS* 3.0 9.8 + - + +
325M LEU* 3.1 32.2 + - + +
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Residues in contact with ARG 323 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
315M GLU* 3.0 39.0 + - - +
321M HIS* 4.2 6.3 - - + -
322M LEU* 1.3 73.3 - - - +
324M LYS* 1.3 62.8 + - - +
325M LEU 3.1 0.2 - - - -
326M ASP* 3.0 25.6 + - - +
327M HIS* 3.2 22.0 + - + -
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Residues in contact with LYS 324 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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263M LEU* 4.2 30.3 - - + +
267M TYR* 3.0 25.6 + - - +
308M ARG* 5.1 4.6 - - - +
312M LYS* 4.3 11.0 - - - +
315M GLU* 5.5 0.6 + - - -
322M LEU* 3.0 9.5 - - + +
323M ARG* 1.3 79.7 - - - +
325M LEU* 1.3 60.2 + - - +
327M HIS* 3.1 19.8 + - + +
328M ILE* 3.6 13.6 + - - +
1P G 3.1 21.2 + - - -
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Residues in contact with LEU 325 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
259M LYS* 3.7 50.7 - - + +
262M VAL* 3.6 38.4 - - + -
263M LEU* 4.0 12.6 - - + +
321M HIS* 4.1 11.4 - - + -
322M LEU* 3.1 25.7 + - + +
324M LYS* 1.3 80.1 - - - +
326M ASP* 1.3 61.0 + - - +
327M HIS 3.2 0.6 + - - -
328M ILE* 4.0 23.6 + - + +
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Residues in contact with ASP 326 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
321M HIS* 2.8 35.6 + - - -
323M ARG* 3.0 17.0 + - + +
325M LEU* 1.3 77.9 - - - +
327M HIS* 1.3 73.7 + - + +
328M ILE 3.6 1.1 - - - -
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Residues in contact with HIS 327 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
323M ARG* 3.2 25.7 + - + -
324M LYS* 3.1 15.8 + - + +
326M ASP* 1.3 91.9 + - + +
328M ILE* 1.3 63.4 + - - +
329M SER* 3.3 3.1 + - - -
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Residues in contact with ILE 328 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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262M VAL* 3.9 29.6 - - + +
263M LEU* 4.6 9.4 - - + -
266M ALA* 4.0 22.0 - - + -
270M GLN* 5.4 1.1 - - - +
324M LYS 3.8 11.4 - - - +
325M LEU* 4.0 25.9 + - + +
326M ASP 3.6 2.2 - - - -
327M HIS* 1.3 77.4 - - - +
329M SER* 1.3 77.4 + - - +
330M GLU* 3.5 4.5 + - - +
332M VAL* 3.5 25.1 - - + -
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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