Contacts of the helix formed by residues 344 - 350 (chain A) in PDB entry 2IVF
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 SER 344 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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342A PHE 3.3 5.1 + - - -
343A LEU* 1.3 74.2 - - - +
345A ALA* 1.3 64.0 + - - +
346A GLU* 3.2 12.0 + - - +
347A ASP* 3.1 36.1 + - - +
348A VAL* 3.0 24.6 + - - +
353A ALA* 3.1 29.7 + - - -
355A GLN 3.1 7.4 - - - -
356A PHE* 4.3 2.5 - - - -
357A TYR* 3.6 3.8 - - - -
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Residues in contact with ALA 345 (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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344A SER* 1.3 71.4 - - - +
346A GLU* 1.3 59.5 + - - +
348A VAL 4.3 0.4 - - - +
349A ASP* 2.8 42.7 + - - +
350A GLY 3.0 2.1 + - - -
351A GLY* 3.5 3.8 - - - -
352A GLU 3.3 19.8 + - - +
355A GLN* 2.9 30.2 + - + -
357A TYR* 3.4 22.2 - - - +
368A LYS* 4.5 6.7 - - - +
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Residues in contact with GLU 346 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
344A SER* 3.3 10.7 + - - +
345A ALA* 1.3 75.6 - - - +
347A ASP* 1.3 65.6 + - - +
350A GLY* 3.2 10.8 + - - -
351A GLY 3.3 21.7 + - - +
352A GLU 3.1 5.9 + - - -
353A ALA* 3.5 25.7 - - - +
391A LYS* 3.0 33.9 + - - +
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Residues in contact with ASP 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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336A ARG* 3.3 39.8 + - - +
342A PHE 3.8 4.0 - - - +
343A LEU* 4.1 2.5 - - + -
344A SER* 3.1 34.5 + - - +
346A GLU* 1.3 80.8 - - - +
348A VAL* 1.3 52.7 + - - +
390A LEU* 3.5 19.9 - - + +
391A LYS* 2.7 43.0 + - - +
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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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343A LEU* 3.6 32.1 - - + -
344A SER 3.0 16.1 + - - +
345A ALA 3.2 0.2 + - - -
347A ASP* 1.3 78.4 - - - +
349A ASP* 1.3 64.3 + - + +
357A TYR* 3.7 27.1 - - + +
366A VAL* 5.0 10.3 - - + -
388A ALA* 5.3 3.6 - - + -
389A ARG 3.8 14.5 - - - +
390A LEU* 3.7 8.4 - - + +
391A LYS* 3.3 20.5 + - - +
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Residues in contact with ASP 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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345A ALA* 2.8 27.7 + - - +
348A VAL* 1.3 78.5 - - + +
350A GLY* 1.3 58.8 + - - +
351A GLY* 3.2 11.8 + - - -
357A TYR* 4.1 12.7 + - - -
368A LYS* 4.2 15.4 + - - -
391A LYS* 4.2 7.6 - - - -
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Residues in contact with GLY 350 (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 ALA 3.0 2.8 + - - -
346A GLU* 3.2 20.2 + - - -
349A ASP* 1.3 77.9 - - - +
351A GLY* 1.3 62.2 + - - +
391A LYS* 4.0 15.5 - - - +
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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