Contacts of the helix formed by residues 346 - 354 (chain A) in PDB entry 4KM5
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 ALA 346 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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341A GLN* 4.1 27.8 + - + -
345A SER* 1.3 71.0 - - - +
347A LYS* 1.3 64.9 + - + +
349A ARG* 3.8 5.8 - - - +
350A LYS* 3.0 24.4 + - - +
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Residues in contact with LYS 347 (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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345A SER* 3.2 12.0 - - - +
346A ALA* 1.3 78.4 - - + +
348A VAL* 1.3 58.7 + - + +
350A LYS* 3.2 7.7 + - - +
351A GLN* 3.0 39.3 + - + +
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Residues in contact with VAL 348 (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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340A ILE* 4.3 2.0 - - + -
344A LEU* 3.1 40.8 - - + +
345A SER* 3.5 6.3 + - - +
346A ALA 3.4 0.4 - - - -
347A LYS* 1.3 74.6 - - + +
349A ARG* 1.3 60.3 + - - +
351A GLN* 3.1 19.6 + - - +
352A LEU* 2.9 48.1 + - + +
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Residues in contact with ARG 349 (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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335A GLN 2.9 25.7 + - - -
336A GLU* 4.3 1.6 - - - +
337A GLY 2.7 22.6 + - - +
338A LEU* 2.8 33.9 + - + +
339A ARG* 5.8 0.2 - - - +
340A ILE* 3.7 21.3 - - + +
341A GLN* 3.3 31.4 - - + +
345A SER 3.5 7.8 + - - +
346A ALA* 3.8 10.3 - - - +
347A LYS 3.3 0.4 - - - -
348A VAL* 1.3 77.7 - - - +
350A LYS* 1.3 63.7 + - - +
352A LEU* 3.3 5.9 + - - +
353A ARG* 3.1 59.4 + - - +
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Residues in contact with LYS 350 (chain A).
Click here for Legend to table.
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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346A ALA 3.0 18.4 + - - +
347A LYS* 3.5 7.9 - - - +
348A VAL 3.2 0.2 - - - -
349A ARG* 1.3 77.8 - - - +
351A GLN* 1.3 64.5 + - + +
353A ARG* 3.5 9.0 + - + +
354A LEU* 3.3 46.7 + - + +
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Residues in contact with GLN 351 (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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347A LYS* 3.0 22.8 + - - +
348A VAL* 3.1 24.2 + - + +
350A LYS* 1.3 81.0 - - + +
352A LEU* 1.3 62.3 + - + +
354A LEU* 3.2 24.8 + - + +
355A LYS* 3.2 30.5 + - - +
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Residues in contact with LEU 352 (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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330A TRP* 3.3 12.5 - - - -
338A LEU* 4.2 11.7 - - + -
340A ILE* 3.9 23.8 - - + -
348A VAL* 2.9 31.4 + - + +
349A ARG 3.3 4.7 + - - +
351A GLN* 1.3 80.2 - - + +
353A ARG* 1.3 56.8 + - - +
354A LEU 3.1 0.4 - - - -
355A LYS* 3.2 34.2 + - + +
382A ILE* 3.7 33.4 - - + +
385A GLU* 4.2 27.4 - - + +
386A ILE* 4.2 13.2 - - + -
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Residues in contact with ARG 353 (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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329A SER* 5.3 3.1 - - - -
330A TRP* 3.7 59.4 + - + +
331A PRO 4.5 2.4 + - - -
334A THR* 3.1 40.0 + - - -
335A GLN* 3.9 8.5 - - - +
337A GLY 5.2 0.2 + - - -
338A LEU* 4.2 7.3 - - + +
349A ARG* 3.1 58.6 + - - +
350A LYS* 3.5 7.8 + - - +
351A GLN 3.3 0.2 - - - -
352A LEU* 1.3 75.6 - - - +
354A LEU* 1.3 63.5 + - - +
355A LYS 3.3 2.0 - - - +
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Residues in contact with LEU 354 (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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327A LYS* 5.3 4.9 - - - +
350A LYS* 3.3 40.6 - - + +
351A GLN* 3.3 17.9 - - + +
352A LEU 3.1 0.6 - - - -
353A ARG* 1.3 77.7 - - - +
355A LYS* 1.3 67.9 + - + +
356A PRO* 3.8 2.1 - - - +
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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