Contacts of the helix formed by residues 305 - 312 (chain K) 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 305 (chain K).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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301K HIS* 5.5 0.7 - - - -
304K VAL* 1.3 77.6 - - - +
306K ASN* 1.3 63.7 + - - +
307K GLN* 3.5 10.3 + - - +
308K PHE* 3.0 18.6 + - - +
309K LEU* 3.0 22.2 + - - +
326K LEU* 4.2 3.6 - - - -
440K GLN* 3.0 23.6 + - - -
452K SER* 5.4 0.7 + - - -
3011K ZAR 6.1 0.7 - - - -
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Residues in contact with ASN 306 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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305K SER* 1.3 73.6 - - - +
307K GLN* 1.3 59.4 + - - +
309K LEU* 3.1 8.1 + - - +
310K ILE* 2.8 41.9 + - + +
324K SER* 4.3 3.2 - - - +
325K VAL* 3.5 14.6 - - + +
326K LEU* 2.8 41.7 + - - +
327K GLU* 2.9 31.5 + - - -
369K ASP* 4.0 12.1 + - - -
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Residues in contact with GLN 307 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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305K SER* 3.5 9.5 + - - +
306K ASN* 1.3 79.8 - - - +
308K PHE* 1.3 57.1 + - - +
310K ILE* 3.2 21.7 + - - +
311K ASN* 2.8 71.0 + - - +
452K SER* 5.9 3.1 - - - +
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Residues in contact with PHE 308 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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304K VAL* 3.5 22.9 - - + -
305K SER* 3.0 26.0 + - - +
307K GLN* 1.3 76.7 - - - +
309K LEU* 1.3 62.7 + - + +
311K ASN* 3.1 6.7 + - - +
312K THR* 2.8 65.5 + - + +
440K GLN* 3.8 14.8 - - + +
443K ARG* 3.3 50.9 - - + -
444K GLU* 3.6 39.7 - - + -
447K ARG* 4.0 8.7 - - - -
449K MET* 4.2 6.3 - - + -
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Residues in contact with LEU 309 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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302K PRO* 4.6 6.1 - - + -
304K VAL* 3.8 23.3 - - + -
305K SER 3.0 15.7 + - - +
306K ASN* 3.4 8.7 - - - +
308K PHE* 1.3 79.5 - - + +
310K ILE* 1.3 58.6 + - - +
312K THR* 3.6 4.4 + - - +
313K ASN 3.5 1.2 + - - -
314K SER* 2.7 56.5 + - - +
316K LEU* 4.5 11.0 - - + -
317K ALA* 3.3 6.9 - - + +
325K VAL* 4.1 17.0 - - + -
326K LEU* 3.6 39.0 - - + -
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Residues in contact with ILE 310 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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306K ASN* 2.8 29.0 + - + +
307K GLN* 3.6 24.0 - - - +
308K PHE 3.1 0.2 - - - -
309K LEU* 1.3 77.3 - - - +
311K ASN* 1.3 68.3 + - - +
313K ASN* 3.1 20.3 + - - +
317K ALA* 3.8 9.7 - - + +
322K ASP* 3.6 59.3 - - + +
325K VAL* 4.3 5.8 - - + -
358L ARG* 6.2 0.2 - - - -
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Residues in contact with ASN 311 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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307K GLN* 2.8 55.1 + - - +
308K PHE* 3.8 1.2 - - - +
310K ILE* 1.3 78.8 - - - +
312K THR* 1.3 58.5 + - - +
313K ASN* 3.1 13.3 + - - +
444K GLU* 5.7 1.0 + - - -
449K MET* 3.8 27.1 - - + +
452K SER* 6.0 0.4 + - - -
351L LYS* 5.8 6.2 + - - +
355L GLN* 5.0 9.4 - - - +
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Residues in contact with THR 312 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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308K PHE* 2.8 59.7 + - + +
309K LEU* 3.6 12.0 + - - +
311K ASN* 1.3 74.7 - - - +
313K ASN* 1.3 71.8 + - - +
314K SER* 3.2 8.3 + - - -
447K ARG* 4.1 16.6 - - - +
449K MET* 3.8 20.0 - - + -
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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