Contacts of the strand formed by residues 251 - 256 (chain C) in PDB entry 3IXK
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 ILE 251 (chain C).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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249C VAL* 4.9 0.9 - - + -
250C ILE* 1.3 71.9 - - - +
252C VAL* 1.3 61.5 + - - +
253C ARG 3.8 13.5 - - - +
254C VAL* 3.9 18.2 - - + -
268C TYR* 3.9 19.6 - - + +
269C ASN* 2.8 36.1 + - - +
273C SER* 3.8 13.9 - - - +
284C LEU* 6.2 0.4 - - + -
333C LEU* 4.2 25.4 - - + -
334C TYR 3.4 11.7 - - - +
335C LEU* 3.7 17.9 - - + -
379C THR* 3.8 29.6 - - + +
381C MET* 4.4 5.6 - - - -
430C CYS* 3.9 5.0 - - - +
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Residues in contact with VAL 252 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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250C ILE* 3.8 18.4 - - + +
251C ILE* 1.3 75.4 - - - +
253C ARG* 1.3 72.7 + - + +
265C CYS* 3.4 18.5 - - - +
268C TYR* 4.3 1.1 - - - -
334C TYR* 2.6 31.5 + - + +
335C LEU 4.5 0.9 - - - -
336C MET* 4.3 6.5 - - - +
343C SER* 4.1 9.9 - - - -
424C THR* 3.7 33.1 - - + +
427C MET* 3.8 22.7 - - + -
430C CYS* 3.7 24.4 - - - -
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Residues in contact with ARG 253 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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251C ILE* 3.8 1.8 - - - +
252C VAL* 1.3 99.4 + - + +
254C VAL* 1.3 66.4 - - - +
260C ASP* 2.8 39.4 + - - +
263C MET 6.0 1.8 - - - -
265C CYS* 5.5 1.8 - - - -
268C TYR* 3.9 8.0 - - - -
334C TYR* 2.9 52.0 + - + +
423C VAL 5.7 2.6 + - - -
424C THR* 4.5 19.4 - - + +
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Residues in contact with VAL 254 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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251C ILE* 3.9 11.9 - - + -
253C ARG* 1.3 77.9 - - - +
255C GLU* 1.3 73.6 + - - +
256C ILE* 5.0 3.1 - - + -
260C ASP* 3.4 9.8 + - - +
261C LEU* 3.1 44.5 + - + +
268C TYR* 3.6 45.4 + - + -
288C VAL* 5.4 3.8 - - + -
331C ILE* 4.9 6.3 - - + -
332C SER 3.6 9.6 - - - +
333C LEU* 4.0 15.0 - - + -
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Residues in contact with GLU 255 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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253C ARG* 5.7 0.2 - - + -
254C VAL* 1.3 78.5 - - - +
256C ILE* 1.3 64.4 + - - +
258C GLY* 3.7 27.7 - - - +
259C GLN 3.3 7.6 - - - +
260C ASP* 4.1 20.9 - - + +
330C VAL 4.7 0.2 - - - -
331C ILE* 3.5 4.9 - - - +
332C SER* 2.8 46.8 + - - +
334C TYR* 2.7 40.9 + - + -
345C ARG* 3.9 9.5 + - - -
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Residues in contact with ILE 256 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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254C VAL* 5.0 2.7 - - + -
255C GLU* 1.3 77.7 - - - +
257C ASN* 1.3 72.5 + - + +
258C GLY 3.2 0.9 - - - -
259C GLN* 2.9 27.7 + - - +
261C LEU* 3.9 17.6 - - + +
292C ALA* 3.6 42.4 - - + +
295C SER* 3.4 25.4 + - - +
296C ILE* 4.1 9.6 - - + -
329C PRO* 3.7 27.6 - - + -
330C VAL 3.5 4.7 - - - +
331C ILE* 3.9 22.0 - - + -
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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