Contacts of the helix formed by residues 417 - 421 (chain A) in PDB entry 1MKD
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 417 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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199A TRP* 3.9 17.0 - - - -
264A ASP* 4.4 1.7 + - - -
268A SER* 3.7 4.0 + - - -
413A CYS 3.3 9.4 - - - -
414A ALA* 2.8 24.6 + - - -
415A ASP 3.4 1.4 + - - -
416A LEU* 1.3 75.9 - - - +
418A ASN* 1.3 71.1 + - - +
419A PRO* 3.4 3.1 - - - -
420A THR* 2.7 32.8 + - - -
421A LYS* 3.4 24.1 + - - +
478A TRP* 4.0 4.7 - - - +
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Residues in contact with ASN 418 (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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256A TYR* 2.5 42.2 + - - -
261A HIS* 5.3 2.4 + - - -
264A ASP* 3.3 24.5 + - - -
414A ALA 5.5 0.2 + - - -
415A ASP 5.2 3.4 + - - -
416A LEU* 3.6 0.8 - - - -
417A SER* 1.3 79.8 + - - +
419A PRO* 1.3 60.3 - - + +
420A THR 2.9 6.1 + - - -
421A LYS* 3.0 18.7 + - - +
426A TYR* 3.5 17.7 - - + +
429A TRP* 3.5 29.0 - - + +
3001A ZAR 3.1 26.0 - - - -
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Residues in contact with PRO 419 (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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416A LEU 4.0 12.1 - - - +
417A SER 3.6 3.6 - - - -
418A ASN* 1.3 94.3 - - + +
420A THR* 1.3 55.7 + - - +
421A LYS 3.4 0.4 - - - -
426A TYR* 3.5 39.5 - - + +
469A PHE* 4.1 19.7 - - + -
470A ILE* 4.0 5.4 - - + -
474A VAL* 4.1 7.4 - - + -
496A LEU* 3.4 31.7 - - + +
499A ASN* 2.8 24.7 + - - +
3001A ZAR 3.7 8.5 - - - -
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Residues in contact with THR 420 (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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199A TRP* 3.3 34.0 + - - -
417A SER* 2.7 19.4 + - - +
419A PRO* 1.3 79.7 - - - +
421A LYS* 1.3 61.8 + - - +
474A VAL* 4.4 2.5 - - + -
478A TRP* 3.6 38.1 - - + +
492A ILE* 3.4 20.7 - - + +
495A THR* 3.4 17.6 - - - +
496A LEU* 3.9 24.5 - - + +
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Residues in contact with LYS 421 (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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199A TRP* 3.4 57.8 + - + +
200A GLY* 4.6 1.1 - - - -
264A ASP* 2.9 31.3 + - - -
267A GLN* 5.0 1.0 + - - -
268A SER* 3.1 18.9 + - - -
417A SER* 3.4 22.4 + - - +
418A ASN* 3.0 16.0 + - - +
420A THR* 1.3 79.2 - - - +
422A PRO* 1.3 79.3 - - + +
423A LEU* 4.2 0.3 - - - -
425A LEU* 4.2 18.4 - - + -
426A TYR* 4.2 1.1 - - - +
429A TRP* 5.4 3.1 - - + +
495A THR* 3.6 3.0 - - - +
499A ASN* 2.9 21.0 + - - -
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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