Contacts of the strand formed by residues 66 - 72 (chain X) in PDB entry 1IRA
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 CYS 66 (chain X).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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57X PHE* 6.3 0.2 - - + -
58X LEU 3.5 10.8 - - - +
59X GLY* 4.6 1.3 - - - -
63X GLY 4.3 1.1 - - - -
65X MET* 1.3 78.8 - - - +
67X LEU* 1.3 65.3 + - - +
79X GLN 3.6 0.7 - - - +
80X LEU* 3.5 3.9 - - - -
81X GLU 2.8 30.9 + - - -
83X VAL* 3.2 29.4 - - + -
85X ILE* 3.6 34.1 - - - -
88X LEU* 4.1 8.7 - - + -
98X PHE* 3.5 26.6 - - + -
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Residues in contact with LEU 67 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23X PHE* 5.9 2.2 - - + -
30X LEU* 4.5 16.2 - - + -
46X ILE* 4.8 8.7 - - + -
58X LEU* 3.0 41.6 + - + +
59X GLY* 3.8 18.8 - - - +
60X ILE* 4.4 8.3 - - + -
66X CYS* 1.3 71.4 - - - +
68X SER* 1.3 59.9 + - - +
78X LEU* 4.4 13.2 - - + -
79X GLN 3.5 5.4 - - - -
80X LEU* 3.6 24.0 - - + -
98X PHE* 3.2 24.8 - - - +
100X PHE* 3.8 15.2 - - + -
121X LEU* 4.7 20.4 - - + -
131X VAL* 6.3 0.4 - - + -
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Residues in contact with SER 68 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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67X LEU* 1.3 76.2 - - - +
69X CYS* 1.3 59.7 + - - +
70X VAL* 4.2 2.3 - - - +
77X ARG 3.7 0.7 - - - +
78X LEU* 3.3 12.3 - - - +
79X GLN* 2.9 43.9 + - - +
81X GLU* 2.7 24.9 + - - -
97X ARG* 3.0 23.3 - - - -
98X PHE* 3.4 18.8 - - - -
100X PHE* 4.6 3.1 - - - -
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Residues in contact with CYS 69 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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68X SER* 1.3 75.2 - - - +
70X VAL* 1.3 66.6 + - - +
76X THR* 3.2 24.0 - - - -
77X ARG 3.4 3.8 - - - -
97X ARG* 3.1 22.6 + - - +
100X PHE* 5.0 2.7 - - + -
113X SER* 3.3 15.7 - - - +
115X ALA* 4.6 2.5 - - + +
116X CYS* 2.0 52.7 - - - -
133X LEU* 3.3 18.2 - - + -
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Residues in contact with VAL 70 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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68X SER* 4.2 3.4 - - - +
69X CYS* 1.3 79.2 - - - +
71X LYS* 1.3 63.3 + - - +
75X GLU 3.5 1.6 - - - +
76X THR* 3.6 0.5 - - - +
77X ARG* 2.8 54.3 + - + +
79X GLN* 3.1 39.7 - - - +
81X GLU* 4.2 13.0 - - - +
97X ARG* 4.2 10.5 - - - -
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Residues in contact with LYS 71 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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70X VAL* 1.3 78.2 - - - +
72X SER* 1.3 61.1 + - - +
73X GLY 3.4 10.0 + - - +
74X ASP* 4.9 8.5 - - - +
75X GLU 3.1 7.6 - - - +
76X THR* 3.1 31.5 + - + +
77X ARG* 4.7 0.9 - - - -
115X ALA 5.3 1.3 + - - -
116X CYS* 3.7 34.2 - - - +
117X PRO* 5.3 3.4 + - - +
119X TRP* 3.9 15.5 - - - +
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Residues in contact with SER 72 (chain X).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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71X LYS* 1.3 67.9 - - - +
73X GLY* 1.3 54.6 + - - +
74X ASP 2.7 14.2 + - - -
75X GLU* 2.9 21.1 + - - +
77X ARG* 3.3 34.8 + - - +
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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